unsuccussful navigation; we stop at this point

attempt to add navigation to plugin (partial success)
fixed enum objects wrong package
2026-01-03 17:53:54 +01:00 · 2026-01-03 11:59:50 +01:00 · 2026-01-02 16:10:05 +01:00 · 2026-01-02 16:03:57 +01:00 · 2026-01-02 11:20:52 +01:00 · 2026-01-02 10:41:16 +01:00
347 changed files with 82749 additions and 1413 deletions
@@ -0,0 +1 @@
 *.zip filter=lfs diff=lfs merge=lfs -text
@@ -15,3 +15,8 @@ xcuserdata
 /kotlin-js-store/yarn.lock
 /test.lyng
 /sample_texts/1.txt.gz
 /kotlin-js-store/wasm/yarn.lock
 /distributables
 .output*.txt
 debug.log
 /build.log
@@ -0,0 +1,28 @@
 <component name="ProjectRunConfigurationManager">
  <configuration default="false" name="Tests in 'lyng.lynglib.jvmTest'" type="GradleRunConfiguration" factoryName="Gradle">
    <ExternalSystemSettings>
      <option name="executionName" />
      <option name="externalProjectPath" value="$PROJECT_DIR$" />
      <option name="externalSystemIdString" value="GRADLE" />
      <option name="scriptParameters" value="" />
      <option name="taskDescriptions">
        <list />
      </option>
      <option name="taskNames">
        <list>
          <option value=":lynglib:cleanJvmTest" />
          <option value=":lynglib:jvmTest" />
        </list>
      </option>
      <option name="vmOptions" />
    </ExternalSystemSettings>
    <ExternalSystemDebugServerProcess>false</ExternalSystemDebugServerProcess>
    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
    <ExternalSystemDebugDisabled>false</ExternalSystemDebugDisabled>
    <DebugAllEnabled>false</DebugAllEnabled>
    <RunAsTest>true</RunAsTest>
    <GradleProfilingDisabled>false</GradleProfilingDisabled>
    <GradleCoverageDisabled>false</GradleCoverageDisabled>
    <method v="2" />
  </configuration>
 </component>
@@ -0,0 +1,44 @@
 <!--
  ~ Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
  ~
  ~ Licensed under the Apache License, Version 2.0 (the "License");
  ~ you may not use this file except in compliance with the License.
  ~ You may obtain a copy of the License at
  ~
  ~     http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  ~
  -->
 <component name="ProjectRunConfigurationManager">
  <configuration default="false" name="lyng:site [jsBrowserDevelopmentRun]" type="GradleRunConfiguration" factoryName="Gradle">
    <ExternalSystemSettings>
      <option name="executionName" />
      <option name="externalProjectPath" value="$PROJECT_DIR$/site" />
      <option name="externalSystemIdString" value="GRADLE" />
      <option name="scriptParameters" value="--continuous" />
      <option name="taskDescriptions">
        <list />
      </option>
      <option name="taskNames">
        <list>
          <option value="jsBrowserDevelopmentRun" />
        </list>
      </option>
      <option name="vmOptions" />
    </ExternalSystemSettings>
    <ExternalSystemDebugServerProcess>true</ExternalSystemDebugServerProcess>
    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
    <ExternalSystemDebugDisabled>false</ExternalSystemDebugDisabled>
    <DebugAllEnabled>false</DebugAllEnabled>
    <RunAsTest>false</RunAsTest>
    <GradleProfilingDisabled>true</GradleProfilingDisabled>
    <GradleCoverageDisabled>true</GradleCoverageDisabled>
    <method v="2" />
  </configuration>
 </component>
@@ -0,0 +1,92 @@
 ## Changelog
 ### Unreleased
 - Language: Class properties with accessors
  - Support for `val` (read-only) and `var` (read-write) properties in classes.
  - Syntax: `val name [ : Type ] get() { body }` or `var name [ : Type ] get() { body } set(value) { body }`.
  - Laconic Expression Shorthand: `val prop get() = expression` and `var prop get() = read set(v) = write`.
  - Properties are pure accessors and do **not** have automatic backing fields.
  - Validation: `var` properties must have both accessors; `val` must have only a getter.
  - Integration: Updated TextMate grammar and IntelliJ plugin (highlighting + keywords).
  - Documentation: New "Properties" section in `docs/OOP.md`.
 - Docs: Scopes and Closures guidance
  - New page: `docs/scopes_and_closures.md` detailing `ClosureScope` resolution order, recursion‑safe helpers (`chainLookupIgnoreClosure`, `chainLookupWithMembers`, `baseGetIgnoreClosure`), cycle prevention, and capturing lexical environments for callbacks (`snapshotForClosure`).
  - Updated: `docs/advanced_topics.md` (link to the new page), `docs/parallelism.md` (closures in `launch`/`flow`), `docs/OOP.md` (visibility from closures with preserved `currentClassCtx`), `docs/exceptions_handling.md` (compatibility alias `SymbolNotFound`).
  - Tutorial: added quick link to Scopes and Closures.
 - IDEA plugin: Lightweight autocompletion (experimental)
  - Global completion: local declarations, in‑scope parameters, imported modules, and stdlib symbols.
  - Member completion: after a dot, suggests only members of the inferred receiver type (incl. chained calls like `Path(".." ).lines().` → `Iterator` methods). No global identifiers appear after a dot.
  - Inheritance-aware: direct class members first, then inherited (e.g., `List` includes `Collection`/`Iterable` methods).
  - Heuristics: handles literals (`"…"` → `String`, numbers → `Int/Real`, `[...]` → `List`, `{...}` → `Dict`) and static `Namespace.` members.
  - Performance: capped results, early prefix filtering, per‑document MiniAst cache, cancellation checks.
  - Toggle: Settings | Lyng Formatter → "Enable Lyng autocompletion (experimental)" (default ON).
  - Stabilization: DEBUG completion/Quick Doc logs are OFF by default; behavior aligned between IDE and isolated engine tests.
 - Language: Named arguments and named splats
  - New call-site syntax for named arguments using colon: `name: value`.
    - Positional arguments must come before named; positionals after a named argument inside parentheses are rejected.
    - Trailing-lambda interaction: if the last parameter is already assigned by name (or via a named splat), a trailing `{ ... }` block is illegal.
  - Named splats: `...` can now expand a Map into named arguments.
    - Only string keys are allowed; non-string keys raise a clear error.
    - Duplicate assignment across named args and named splats is an error.
    - Ellipsis (variadic) parameters remain positional-only and cannot be named.
  - Rationale: `=` is assignment and an expression in Lyng; `:` at call sites avoids ambiguity. Declarations keep `name: Type`; call-site casts continue to use `as` / `as?`.
  - Documentation updated: proposals and declaring-arguments sections now cover named args/splats and error cases.
  - Tests added covering success cases and errors for named args/splats and trailing-lambda interactions.
 - Tooling: Highlighters and TextMate bundle updated for named args
  - Website/editor highlighter (lyngweb + site) works with `name: value` and `...Map("k" => v)`; added JS tests covering punctuation/operator spans for `:` and `...`.
  - TextMate grammar updated to recognize named call arguments: `name: value` after `(` or `,` with `name` highlighted as `variable.parameter.named.lyng` and `:` as punctuation; excludes `::`.
  - TextMate bundle version bumped to 0.0.3; README updated with details and guidance.
 - Multiple Inheritance (MI) completed and enabled by default:
  - Active C3 Method Resolution Order (MRO) for deterministic, monotonic lookup across complex hierarchies and diamonds.
  - Qualified dispatch:
    - `this@Type.member(...)` inside class bodies starts lookup at the specified ancestor.
    - Cast-based disambiguation: `(expr as Type).member(...)`, `(expr as? Type)?.member(...)` (works with existing safe-call `?.`).
  - Field inheritance (`val`/`var`) under MI:
    - Instance storage is disambiguated per declaring class; unqualified read/write resolves to the first match in MRO.
    - Qualified read/write targets the chosen ancestor’s storage.
  - Constructors and initialization:
    - Direct bases are initialized left-to-right; each ancestor is initialized at most once (diamond-safe de-duplication).
    - Header-specified constructor arguments are passed to direct bases.
  - Visibility enforcement under MI:
    - `private` visible only inside the declaring class body.
    - `protected` visible inside the declaring class and any of its transitive subclasses; unrelated contexts cannot access it (qualification/casts do not bypass).
  - Diagnostics improvements:
    - Missing member/field messages include receiver class and linearization order; hints for `this@Type` or casts when helpful.
    - Invalid `this@Type` reports that the qualifier is not an ancestor and shows the receiver lineage.
    - `as`/`as?` cast errors include actual and target type names.
 - Documentation updated (docs/OOP.md and tutorial quick-start) to reflect MI with active C3 MRO.
 Notes:
 - Existing single-inheritance code continues to work; resolution reduces to the single base.
 - If code previously relied on non-deterministic parent set iteration, C3 MRO provides a predictable order; disambiguate explicitly if needed using `this@Type`/casts.
 # Changelog
 All notable changes to this project will be documented in this file.
 ## Unreleased
 - CLI: Added `fmt` as a first-class Clikt subcommand.
  - Default behavior: formats files to stdout (no in-place edits by default).
  - Options:
    - `--check`: check only; print files that would change; exit with code 2 if any changes are needed.
    - `-i, --in-place`: write formatted result back to files.
    - `--spacing`: apply spacing normalization.
    - `--wrap`, `--wrapping`: enable line wrapping.
  - Mutually exclusive: `--check` and `--in-place` together now produce an error and exit with code 1.
  - Multi-file stdout prints headers `--- <path> ---` per file.
  - `lyng --help` shows `fmt`; `lyng fmt --help` displays dedicated help.
 - CLI: Preserved legacy script invocation fast-paths:
  - `lyng script.lyng [args...]` executes the script directly.
  - `lyng -- -file.lyng [args...]` executes a script whose name begins with `-`.
 - CLI: Fixed a regression where the root help banner could print before subcommands.
  - Root command no longer prints help when a subcommand (e.g., `fmt`) is invoked.
@@ -1,14 +1,18 @@
 # Lyng: modern scripting for kotlin multiplatform
-A KMP library and a standalone interpreter
+Please visit the project homepage: [https://lynglang.com](https://lynglang.com) and a [telegram channel](https://t.me/lynglang) for updates.
 - simple, compact, intuitive and elegant modern code:
-```
+```lyng
 class Point(x, y) {
   fun dist() { sqrt(x*x + y*y) } 
 }
-Point(3,4).dist() //< 5
+
 // Auto-named arguments shorthand (x: is x: x):
 val x = 3
 val y = 4
 Point(x:, y:).dist() //< 5
 fun swapEnds(first, args..., last, f) {
    f( last, ...args, first)
@@ -37,8 +41,12 @@ and it is multithreaded on platforms supporting it (automatically, no code chang
 ## Resources: 
 - [Language home](https://lynglang.com)
 - [introduction and tutorial](docs/tutorial.md) - start here please
 - [Testing and Assertions](docs/Testing.md)
 - [Efficient Iterables in Kotlin Interop](docs/EfficientIterables.md)
 - [Samples directory](docs/samples)
 - [Formatter (core + CLI + IDE)](docs/formatter.md)
 - [Books directory](docs)
 ## Integration in Kotlin multiplatform
@@ -115,6 +123,28 @@ scope.eval("sumOf(1,2,3)") // <- 6
 ```
 Note that the scope stores all changes in it so you can make calls on a single scope to preserve state between calls.
 ## IntelliJ IDEA plugin: Lightweight autocompletion (experimental)
 The IDEA plugin provides a fast, lightweight BASIC completion for Lyng code (IntelliJ IDEA 2024.3+).
 What it does:
 - Global suggestions: in-scope parameters, same-file declarations (functions/classes/vals), imported modules, and stdlib symbols.
 - Member completion after dot: offers only members of the inferred receiver type. It works for chained calls like `Path(".." ).lines().` (suggests `Iterator` methods), and for literals like `"abc".` (String methods) or `[1,2,3].` (List/Iterable methods).
 - Inheritance-aware: shows direct class members first, then inherited. For example, `List` also exposes common `Collection`/`Iterable` methods.
 - Static/namespace members: `Name.` lists only static members when `Name` is a known class or container (e.g., `Math`).
 - Performance: suggestions are capped; prefix filtering is early; parsing is cached; computation is cancellation-friendly.
 What it does NOT do (yet):
 - No heavy resolve or project-wide indexing. It’s best-effort, driven by a tiny MiniAst + built-in docs registry.
 - No control/data-flow type inference.
 Enable/disable:
 - Settings | Lyng Formatter → "Enable Lyng autocompletion (experimental)" (default: ON).
 Tips:
 - After a dot, globals are intentionally suppressed (e.g., `lines().Path` is not valid), only the receiver’s members are suggested.
 - If completion seems sparse, make sure related modules are imported (e.g., `import lyng.io.fs` so that `Path` and its methods are known).
 ## Why? 
 Designed to add scripting to kotlin multiplatform application in easy and efficient way. This is attempt to achieve what Lua is for C/++.
@@ -134,21 +164,8 @@ Designed to add scripting to kotlin multiplatform application in easy and effici
 # Language Roadmap
-```mermaid
+We are now at **v1.0**: basic optimization performed, battery included: standard library is 90% here, initial
-flowchart
+support in HTML, popular editors, and IDEA; tools to syntax highlight and format code are ready. It was released closed to schedule.
    v0([the idea])
    v1([v1: make it happen])
    v2([v1.5: testmake it fasted and rich featured])
    v3([v2: ideal script language])
    v0 --code MVP--> v1
    v1 --refine and extend--> v2
    v2 -- optimize --> v3
 ```
 ## v1.0.0 "Make it happen"
 Planned autumn 2025. Complete dynamic language with sufficient standard library:
 Ready features:
@@ -171,31 +188,34 @@ Ready features:
 - [x] dynamic fields
 - [x] function annotations
 - [x] better stack reporting
 - [x] regular exceptions + extended `when`
 - [x] multiple inheritance for user classes
 - [x] class properties (accessors)
-###  Under way: 
+## plan: towards v1.5 Enhancing
 - [ ] regular exceptions + extended `when`
 - [ ] multiple inheritance for user classes
 - [ ] site with integrated interpreter to give a try
 - [ ] kotlin part public API good docs, integration focused
 ## plan: v1.0 - v1.5 "Rich and stable"
 Estimated spring of 2026
 Planned features.
 - [x] site with integrated interpreter to give a try
 - [x] kotlin part public API good docs, integration focused
 - [ ] type specifications
- [ ] language server or compose-based lyng-aware editor
+- [x] Textmate Bundle
 - [x] IDEA plugin
 - [ ] source docs and maybe lyng.md to a standard
 - [ ] metadata first class access from lyng
 - [x] aggressive optimizations
 - [ ] compile to JVM bytecode optimization
 ## After 1.5 "Ideal scripting"
-Estimated winter 2027
+Estimated summer 2026
- [ ] client with GUI support based on compose multiplatform somehow
+- propose your feature! 
- [ ] notebook - style workbooks with graphs, formulae, etc.
+
- [ ] aggressive optimizations
+## Authors
@-links are for contacting authors on [project home](https://gitea.sergeych.net/SergeychWorks/lyng): this simplest s to open issue for the person you need to convey any information about this project.
 __Sergey Chernov__ @sergeych: Initial idea and architecture, language concept, design, implementation.
 __Yulia Nezhinskaya__ @AlterEgoJuliaN: System analysis, math and features design.
 [parallelism]: docs/parallelism.md
@@ -0,0 +1,177 @@
 #!/bin/bash
 #
 # Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
 #
 function checkState() {
  if [[ $? != 0 ]]; then
    echo
    echo -- rsync failed. deploy was not finished. deployed version has not been affected
    echo
    exit 100
  fi
 }
 # Update docs/idea_plugin.md to point to the latest built IDEA plugin zip
 # from ./distributables before building the site. The change is temporary and
 # the original file is restored right after the build.
 DOC_IDEA_PLUGIN="docs/idea_plugin.md"
 DOC_IDEA_PLUGIN_BACKUP="${DOC_IDEA_PLUGIN}.deploy_backup"
 function updateIdeaPluginDownloadLink() {
  if [[ ! -f "$DOC_IDEA_PLUGIN" ]]; then
    echo "WARN: $DOC_IDEA_PLUGIN not found; skipping plugin link update"
    return 0
  fi
  # Find the most recently modified plugin zip
  local latest
  latest=$(ls -t distributables/lyng-idea-*.zip 2>/dev/null | head -n 1)
  if [[ -z "$latest" ]]; then
    echo "WARN: no distributables/lyng-idea-*.zip found; leaving $DOC_IDEA_PLUGIN unchanged"
    return 0
  fi
  local base
  base=$(basename "$latest")
  local version
  version="${base#lyng-idea-}"
  version="${version%.zip}"
  local url
  url="https://lynglang.com/distributables/${base}"
  local newline
  newline="### [Download plugin v${version}](${url})"
  # Backup and rewrite the specific markdown line if present
  cp "$DOC_IDEA_PLUGIN" "$DOC_IDEA_PLUGIN_BACKUP" || {
    echo "ERROR: can't backup $DOC_IDEA_PLUGIN"; return 1; }
  # Replace the line that starts with the download header; if not found, append it
  awk -v repl="$newline" 'BEGIN{done=0} \
    /^### \[Download plugin v/ { print repl; done=1; next } \
    { print } \
    END { if (done==0) exit 42 }' "$DOC_IDEA_PLUGIN_BACKUP" > "$DOC_IDEA_PLUGIN"
  local rc=$?
  if [[ $rc -eq 42 ]]; then
    echo "WARN: download link not found in $DOC_IDEA_PLUGIN; appending generated link"
    echo >> "$DOC_IDEA_PLUGIN"
    echo "$newline" >> "$DOC_IDEA_PLUGIN"
  elif [[ $rc -ne 0 ]]; then
    echo "ERROR: failed to update $DOC_IDEA_PLUGIN; restoring original"
    mv -f "$DOC_IDEA_PLUGIN_BACKUP" "$DOC_IDEA_PLUGIN" 2>/dev/null
    return 1
  fi
 }
 # default target settings
 case "com" in
  com)
    SSH_HOST=sergeych@d.lynglang.com # host to deploy to
    SSH_PORT=22                             # ssh port on it
    ROOT=/bigstore/sergeych_pub/lyng                 # directory to rsync to
    ;;
 #  com)
 #    SSH_HOST=vvk@front-01.neurodatalab.com
 #    ROOT=/home/vvk
 #    ;;
  *)
    echo "*** ERROR: target not specified (use deploy com | dev)"
    echo "*** stop"
    exit 101
 esac
 die() { echo "ERROR: $*" 1>&2 ; exit 1; }
 function refreshTextmateZip() {
  echo "Refreshing distributables/lyng-textmate.zip from editors/..."
  mkdir -p distributables
  # We use -r for recursive and -q for quiet (optional)
  # -j can be used if we want to junk paths, but the request says "contents of editors/"
  # usually we want to preserve the structure inside editors/
  (cd editors && zip -rq ../distributables/lyng-textmate.zip .)
 }
 # Update the IDEA plugin download link in docs (temporarily), then build, then restore the doc
 refreshTextmateZip
 updateIdeaPluginDownloadLink || echo "WARN: proceeding without updating IDEA plugin download link"
 ./gradlew site:jsBrowserDistribution
 BUILD_RC=$?
 # Always restore original doc if backup exists
 if [[ -f "$DOC_IDEA_PLUGIN_BACKUP" ]]; then
  mv -f "$DOC_IDEA_PLUGIN_BACKUP" "$DOC_IDEA_PLUGIN"
 fi
 if [[ $BUILD_RC -ne 0 ]]; then
  echo
  echo -- build failed. deploy aborted.
  echo
  exit 100
 fi
 #exit 0
 # Prepare working dir
 ssh -p ${SSH_PORT} ${SSH_HOST} "
  cd ${ROOT}
  rm -rd build 2>/dev/null
  if [ -d release ]; then
    echo copying current release
    cp -r release build
  else
    echo creating first release
    mkdir release
    mkdir build
  fi
 ";
 # sync files
 SRC=./site/build/dist/js/productionExecutable
 rsync -e "ssh -p ${SSH_PORT}" -avz -r -d --delete ${SRC}/* ${SSH_HOST}:${ROOT}/build/dist
 checkState
 #rsync -e "ssh -p ${SSH_PORT}" -avz  ./static/* ${SSH_HOST}:${ROOT}/build/dist
 #checkState
 rsync -e "ssh -p ${SSH_PORT}" -avz -r -d --delete distributables/* ${SSH_HOST}:${ROOT}/build/dist/distributables
 checkState
 echo
 echo finalizing the deploy...
 ssh -p ${SSH_PORT} ${SSH_HOST} "
  cd ${ROOT}
  rm -rd release~
  mv release release~
  mv build release
  cd release
  # in this project we needn't restart back when we deploy the front
  #  ~/bin/restart_service
 ";
 if [[ $? != 0 ]]; then
  echo
  echo -- finalization failed. the rease might be corrupt. rolling back is not yet implemented.
  echo
  exit 100
 fi
 echo
 echo Deploy successful
 echo
@@ -0,0 +1,256 @@
 #!/bin/bash
 #
 # Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
 #
 set -e
 # Configuration
 DOCS_DIR="docs"
 OUTPUT_DIR="distributables"
 TEMP_DIR="build/temp_docs"
 MERGED_MD="$TEMP_DIR/merged.md"
 OUTPUT_HTML="$OUTPUT_DIR/lyng_documentation.html"
 mkdir -p "$OUTPUT_DIR"
 mkdir -p "$TEMP_DIR"
 # Files that should come first in specific order
 PRIORITY_FILES=(
    "tutorial.md"
    "OOP.md"
    "advanced_topics.md"
    "declaring_arguments.md"
    "scopes_and_closures.md"
    "exceptions_handling.md"
    "when.md"
    "parallelism.md"
    "Testing.md"
 )
 # Files that should come next (reference)
 REFERENCE_FILES=(
    "Collection.md"
    "Iterable.md"
    "Iterator.md"
    "List.md"
    "Set.md"
    "Map.md"
    "Array.md"
    "Buffer.md"
    "RingBuffer.md"
    "Range.md"
    "Real.md"
    "Regex.md"
    "math.md"
    "time.md"
 )
 # Files that are about integration/tools
 INTEGRATION_FILES=(
    "serialization.md"
    "json_and_kotlin_serialization.md"
    "embedding.md"
    "lyng_cli.md"
    "lyng.io.fs.md"
    "formatter.md"
    "EfficientIterables.md"
 )
 # Tracking processed files to avoid duplicates
 PROCESSED_PATHS=()
 is_excluded() {
    local full_path="$1"
    if grep -q "excludeFromIndex" "$full_path"; then
        return 0 # true in bash
    fi
    return 1 # false
 }
 process_file() {
    local rel_path="$1"
    local full_path="$DOCS_DIR/$rel_path"
    if [[ ! -f "$full_path" ]]; then
        return
    fi
    if is_excluded "$full_path"; then
        echo "Skipping excluded: $rel_path"
        return
    fi
    # Check for duplicates
    for p in "${PROCESSED_PATHS[@]}"; do
        if [[ "$p" == "$rel_path" ]]; then
            return
        fi
    done
    PROCESSED_PATHS+=("$rel_path")
    echo "Processing: $rel_path"
    # 1. Add an anchor for the file based on its path
    local anchor_name=$(echo "$rel_path" | sed 's/\//_/g')
    echo "<div id=\"$anchor_name\"></div>" >> "$MERGED_MD"
    echo "" >> "$MERGED_MD"
    # 2. Append content with fixed links
    # - [text](file.md) -> [text](#file.md)
    # - [text](dir/file.md) -> [text](#dir_file.md)
    # - [text](file.md#anchor) -> [text](#anchor)
    # - Fix image links: [alt](../images/...) -> [alt](images/...) if needed, but none found yet.
    cat "$full_path" | \
    perl -pe 's/\[([^\]]+)\]\(([^)]+)\.md\)/"[$1](#" . ($2 =~ s|\/|_|gr) . ".md)"/ge' | \
    perl -pe 's/\[([^\]]+)\]\(([^)]+)\.md#([^)]+)\)/[$1](#$3)/g' >> "$MERGED_MD"
    echo -e "\n\n---\n\n" >> "$MERGED_MD"
 }
 # Start with an empty merged file
 echo "% Lyng Language Documentation" > "$MERGED_MD"
 echo "" >> "$MERGED_MD"
 # 1. Process priority files
 for f in "${PRIORITY_FILES[@]}"; do
    process_file "$f"
 done
 # 2. Process reference files
 for f in "${REFERENCE_FILES[@]}"; do
    process_file "$f"
 done
 # 3. Process integration files
 for f in "${INTEGRATION_FILES[@]}"; do
    process_file "$f"
 done
 # 4. Process remaining files in docs root
 for f in "$DOCS_DIR"/*.md; do
    rel_f=${f#"$DOCS_DIR/"}
    process_file "$rel_f"
 done
 # 5. Process remaining files in subdirs (like samples)
 find "$DOCS_DIR" -name "*.md" | sort | while read -r f; do
    rel_f=${f#"$DOCS_DIR/"}
    process_file "$rel_f"
 done
 echo "Running pandoc to generate $OUTPUT_HTML..."
 # Use a basic but clean CSS
 pandoc "$MERGED_MD" -o "$OUTPUT_HTML" \
    --toc --toc-depth=2 \
    --standalone \
    --embed-resources \
    --metadata title="Lyng Language Documentation" \
    --css <(echo "
        body { 
            font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Helvetica, Arial, sans-serif;
            line-height: 1.6; 
            max-width: 1000px; 
            margin: 0 auto; 
            padding: 2em; 
            color: #24292e;
            background-color: #fff;
        }
        code { 
            background-color: rgba(27,31,35,0.05); 
            padding: 0.2em 0.4em; 
            border-radius: 3px; 
            font-family: SFMono-Regular, Consolas, \"Liberation Mono\", Menlo, monospace;
            font-size: 85%;
        }
        pre { 
            background-color: #f6f8fa; 
            padding: 16px; 
            overflow: auto; 
            border-radius: 3px;
            line-height: 1.45;
        }
        pre code {
            background-color: transparent;
            padding: 0;
            font-size: 100%;
        }
        h1 { 
            border-bottom: 1px solid #eaecef; 
            padding-bottom: 0.3em; 
            margin-top: 24px;
            margin-bottom: 16px;
            font-weight: 600;
        }
        h2 { 
            border-bottom: 1px solid #eaecef; 
            padding-bottom: 0.3em; 
            margin-top: 24px;
            margin-bottom: 16px;
            font-weight: 600;
        }
        hr { 
            height: 0.25em;
            padding: 0;
            margin: 24px 0;
            background-color: #e1e4e8;
            border: 0;
        }
        blockquote {
            padding: 0 1em;
            color: #6a737d;
            border-left: 0.25em solid #dfe2e5;
            margin: 0 0 16px 0;
        }
        nav#TOC { 
            background: #f9f9f9; 
            padding: 1em; 
            border: 1px solid #eee; 
            margin-bottom: 2.5em; 
            border-radius: 6px;
        }
        nav#TOC ul { 
            list-style: none; 
            padding-left: 1.5em; 
        }
        nav#TOC > ul {
            padding-left: 0;
        }
        table {
            border-spacing: 0;
            border-collapse: collapse;
            margin-top: 0;
            margin-bottom: 16px;
        }
        table th, table td {
            padding: 6px 13px;
            border: 1px solid #dfe2e5;
        }
        table tr {
            background-color: #fff;
            border-top: 1px solid #c6cbd1;
        }
        table tr:nth-child(2n) {
            background-color: #f6f8fa;
        }
    ")
 echo "-------------------------------------------------------"
 echo "Done! Documentation generated successfully."
 echo "Location: $OUTPUT_HTML"
 echo "-------------------------------------------------------"
@@ -25,3 +25,6 @@ file=./lyng/build/bin/linuxX64/releaseExecutable/lyng.kexe
 strip $file
 upx   $file
 cp $file ~/bin/lyng
 cp $file ./distributables/lyng
 zip ./distributables/lyng-linuxX64 ./distributables/lyng
 rm ./distributables/lyng
@@ -1,5 +1,5 @@
 /*
- * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
+ * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -20,3 +20,18 @@ plugins {
    alias(libs.plugins.kotlinMultiplatform) apply  false
    alias(libs.plugins.vanniktech.mavenPublish) apply false
 }
 // Convenience alias to run the IntelliJ IDE with the Lyng plugin from the project root.
 // Usage: ./gradlew runIde
 // It simply delegates to :lyng-idea:runIde provided by the Gradle IntelliJ Plugin.
 tasks.register<org.gradle.api.DefaultTask>("runIde") {
    group = "intellij"
    description = "Run IntelliJ IDEA with the Lyng plugin (:lyng-idea)"
    dependsOn(":lyng-idea:runIde")
 }
 tasks.register<Exec>("generateDocs") {
    group = "documentation"
    description = "Generates a single-file documentation HTML using bin/generate_docs.sh"
    commandLine("./bin/generate_docs.sh")
 }
@@ -12,7 +12,7 @@ Is a [Iterable] with known `size`, a finite [Iterable]:
 (1)
 : `comparator(a,b)` should return -1 if `a < b`, +1 if `a > b` or zero.
-See [List], [Set] and [Iterable]
+See [List], [Set], [Iterable] and [Efficient Iterables in Kotlin Interop](EfficientIterables.md)
 [Iterable]: Iterable.md
 [List]: List.md
@@ -0,0 +1,92 @@
 # Efficient Iterables in Kotlin Interop
 Lyng provides high-performance iteration mechanisms that allow Kotlin-side code to interact with Lyng iterables efficiently and vice versa.
 ## 1. Enumerating Lyng Objects from Kotlin
 To iterate over a Lyng object (like a `List`, `Set`, or `Range`) from Kotlin code, use the virtual `enumerate` method:
 ```kotlin
 val lyngList: Obj = ... 
 lyngList.enumerate(scope) { item ->
    println("Processing $item")
    true // return true to continue, false to break
 }
 ```
 ### Why it's efficient:
 - **Zero allocation**: Unlike traditional iterators, it doesn't create a `LyngIterator` object or any intermediate wrappers.
 - **Direct access**: Subclasses like `ObjList` override `enumerate` to iterate directly over their internal Kotlin collections.
 - **Reduced overhead**: It avoids multiple `invokeInstanceMethod` calls for `hasNext()` and `next()` on every step, which would normally involve dynamic dispatch and scope overhead.
 ## 2. Reactive Enumeration with Flow
 If you prefer a reactive approach or need to integrate with Kotlin Coroutines flows, use `toFlow()`:
 ```kotlin
 lyngList.toFlow(scope).collect { item ->
    // ...
 }
 ```
 *Note: `toFlow()` internally uses the Lyng iterator protocol (`iterator()`, `hasNext()`, `next()`), so it's slightly less efficient than `enumerate()` for performance-critical loops, but more idiomatic for flow-based processing.*
 ## 3. Creating Efficient Iterables for Lyng in Kotlin
 When implementing a custom object in Kotlin that should be iterable in Lyng (e.g., usable in `for (x in myObj) { ... }`), follow these steps to ensure maximum performance.
 ### A. Inherit from `Obj` and use `ObjIterable`
 Ensure your object's class has `ObjIterable` as a parent so the Lyng compiler recognizes it as an iterable.
 ```kotlin
 class MyCollection(val items: List<Obj>) : Obj() {
    override val objClass = MyCollection.type
    companion object {
        val type = ObjClass("MyCollection", ObjIterable).apply {
            // Provide a Lyng-side iterator for compatibility with 
            // manual iterator usage in Lyng scripts.
            // Using ObjKotlinObjIterator if items are already Obj instances:
            addFn("iterator") { 
                ObjKotlinObjIterator(thisAs<MyCollection>().items.iterator()) 
            }
        }
    }
 }
 ```
 ### B. Override `enumerate` for Maximum Performance
 The Lyng compiler's `for` loops use the `enumerate` method. By overriding it in your Kotlin class, you provide a "fast path" for iteration.
 ```kotlin
 class MyCollection(val items: List<Obj>) : Obj() {
    // ...
    override suspend fun enumerate(scope: Scope, callback: suspend (Obj) -> Boolean) {
        for (item in items) {
            // If callback returns false, it means 'break' was called in Lyng
            if (!callback(item)) break
        }
    }
 }
 ```
 ### C. Use `ObjInt.of()` for Numeric Data
 If your iterable contains integers, always use `ObjInt.of(Long)` instead of the `ObjInt(Long)` constructor. Lyng maintains a cache for small integers (-128 to 127), which significantly reduces object allocations and GC pressure during tight loops.
 ```kotlin
 // Efficiently creating an integer object
 val obj = ObjInt.of(42L) 
 // Or using extension methods which also use the cache:
 val obj2 = 42.toObj()
 val obj3 = 42L.toObj()
 ```
 #### Note on `toObj()` extensions:
 While `<reified T> T.toObj()` is convenient, using specific extensions like `Int.toObj()` or `Long.toObj()` is slightly more efficient as they use the `ObjInt` cache.
 ## 4. Summary of Best Practices
 - **To Consume**: Use `enumerate(scope) { item -> ... true }`.
 - **To Implement**: Override `enumerate` in your `Obj` subclass.
 - **To Register**: Use `ObjIterable` (or `ObjCollection`) as a parent class in your `ObjClass` definition.
 - **To Optimize**: Use `ObjInt.of()` (or `.toObj()`) for all integer object allocations.
@@ -40,13 +40,13 @@ available, for example
 ## joinToString
 This methods convert any iterable to a string joining string representation of each element, optionally transforming it
-and joining using specified suffix.
+and joining using specified separator.
-    Iterable.joinToString(suffux=' ', transform=null)
+    Iterable.joinToString(separator=' ', transformer=null)
 - if `Iterable` `isEmpty`, the empty string `""` is returned.
- `suffix` is inserted between items when there are more than one.
+- `separator` is inserted between items when there are more than one.
- `transform` of specified is applied to each element, otherwise its `toString()` method is used.
+- `transformer` of specified is applied to each element, otherwise its `toString()` method is used.
 Here is the sample:
@@ -55,7 +55,7 @@ Here is the sample:
    assertEquals( (1..3).joinToString { it * 10 }, "10 20 30")
    >>> void
-## `sum` and `sumBy`
+## `sum` and `sumOf`
 These, again, does the thing:
@@ -68,6 +68,80 @@ These, again, does the thing:
    >>> void
 ## map, filter and their variations
 Used to transform or filter the whole iterable stream:
    val source = [1,2,3,4]
    // map: transform every element to something else
    assertEquals(["n1", "n2", "n3", "n4"], source.map { "n"+it } )
    // filter: keep only elements matching the predicate
    assertEquals([2, 4], source.filter { it % 2 == 0 } )
    // count: count elements matching the predicate
    assertEquals(2, source.count { it % 2 == 0 } )
    // mapNotNull: transform every element, skipping null results:
    assertEquals(["n1", "n2", "n4"], source.mapNotNull { if( it == 3 ) null else "n"+it } )
    // filterNotNull: skip all null elements:
    assertEquals([1, 2, 4], [1, 2, null, 4].filterNotNull())
    >>> void
 You can also use flow variations that return a cold `Flow` instead of a `List`, which is useful for large or infinite sequences:
    val source = [1, 2, 3, 4]
    // filterFlow: returns a Flow of filtered elements
    assert( source.filterFlow { it % 2 == 0 } is Flow )
    // filterFlowNotNull: returns a Flow of non-null elements
    assert( [1, null, 2].filterFlowNotNull() is Flow )
    >>> void
 ## minOf and maxOf
 Find the minimum or maximum value of a function applied to each element:
    val source = ["abc", "de", "fghi"]
    assertEquals(2, source.minOf { it.length })
    assertEquals(4, source.maxOf { it.length })
    >>> void
 ## flatten and flatMap
 Work with nested collections:
    val nested = [[1, 2], [3, 4]]
    // flatten: combine nested collections into one list
    assertEquals([1, 2, 3, 4], nested.flatten())
    // flatMap: map each element to a collection and flatten the result
    assertEquals([1, 10, 2, 20], [1, 2].flatMap { [it, it*10] })
    >>> void
 ## findFirst and findFirstOrNull
 Search for the first element that satisfies the given predicate:
    val source = [1, 2, 3, 4]
    assertEquals( 2, source.findFirst { it % 2 == 0 } )
    assertEquals( 2, source.findFirstOrNull { it % 2 == 0 } )
    // findFirst throws if not found:
    assertThrows( NoSuchElementException ) { source.findFirst { it > 10 } }
    // findFirstOrNull returns null if not found:
    assertEquals( null, source.findFirstOrNull { it > 10 } )
    >>> void
 ## Instance methods:
 | fun/method             | description                                                                     |
@@ -75,52 +149,56 @@ These, again, does the thing:
 | toList()               | create a list from iterable                                                     |
 | toSet()                | create a set from iterable                                                      |
 | contains(i)            | check that iterable contains `i`                                                |
-| `i in iterator`        | same as `contains(i)`                                                           |
+| `i in iterable`        | same as `contains(i)`                                                           |
 | isEmpty()              | check iterable is empty                                                         |
 | forEach(f)             | call f for each element                                                         |
 | toMap()                | create a map from list of key-value pairs (arrays of 2 items or like)           |
 | any(p)                 | true if any element matches predicate `p`                        |
 | all(p)                 | true if all elements match predicate `p`                         |
 | map(f)                 | create a list of values returned by `f` called for each element of the iterable |
 | indexOf(i)             | return index if the first encounter of i or a negative value if not found       |
 | associateBy(kf)        | create a map where keys are returned by kf that will be called for each element |
 | filter(p)              | create a list of elements matching predicate `p`                |
 | count(p)               | count elements matching predicate `p`                            |
 | filterFlow(p)          | create a [Flow] of elements matching predicate `p`               |
 | filterNotNull()        | create a list of non-null elements                               |
 | filterFlowNotNull()    | create a [Flow] of non-null elements                             |
 | minOf(f)               | return minimum value of `f` applied to elements                  |
 | maxOf(f)               | return maximum value of `f` applied to elements                  |
 | flatten()              | flatten nested collections into a single [List]                  |
 | flatMap(f)             | map each element with `f` and flatten results into a [List]      |
 | findFirst(p)           | return first element matching predicate `p` or throw (1)         |
 | findFirstOrNull(p)     | return first element matching predicate `p` or `null`                            |
 | first                  | first element (1)                                                               |
 | last                   | last element (1)                                                                |
 | take(n)                | return [Iterable] of up to n first elements                                     |
-| taleLast(n)            | return [Iterable] of up to n last elements                                      |
+| takeLast(n)            | return [Iterable] of up to n last elements                                      |
 | drop(n)                | return new [Iterable] without first n elements                                  |
 | dropLast(n)            | return new [Iterable] without last n elements                                   |
 | sum()                  | return sum of the collection applying `+` to its elements (3)                   |
-| sumOf(predicate)       | sum of the modified collection items (3)                                        |
+| sumOf(f)               | sum of the modified collection items (3)                                        |
 | sorted()               | return [List] with collection items sorted naturally                            |
 | sortedWith(comparator) | sort using a comparator that compares elements (1)                              |
 | sortedBy(predicate)    | sort by comparing results of the predicate function                             |
 | joinToString(s,t)      | convert iterable to string, see (2)                                             |
 | reversed()             | create a list containing items from this in reverse order                       |
-| shuffled()             | create a listof shiffled elements                                               |
+| shuffled()             | create a list of shuffled elements                                              |
 (1)
-: throws `NoSuchElementException` if there is no such element
+:: throws `NoSuchElementException` if there is no such element
 (2)
-: `joinToString(suffix=" ",transform=null)`: suffix is inserted between items if there are more than one, trasnfom is
+:: `joinToString(separator=" ", transformer=null)`: separator is inserted between items if there are more than one, transformer is
 optional function applied to each item that must return result string for an item, otherwise `item.toString()` is used.
 (3)
-: sum of empty collection is `null`
+:: sum of empty collection is `null`
    fun Iterable.toList(): List
    fun Iterable.toSet(): Set
    fun Iterable.indexOf(element): Int
    fun Iterable.contains(element): Bool
    fun Iterable.isEmpty(element): Bool
    fun Iterable.forEach(block: (Any?)->Void ): Void
    fun Iterable.map(block: (Any?)->Void ): List
    fun Iterable.associateBy( keyMaker: (Any?)->Any): Map
 ## Abstract methods:
    fun iterator(): Iterator
-Creates a list by iterating to the end. So, the Iterator should be finite to be used with it.
+For high-performance Kotlin-side interop and custom iterable implementation details, see [Efficient Iterables in Kotlin Interop](EfficientIterables.md).
 ## Included in interfaces:
@@ -134,6 +212,8 @@ Creates a list by iterating to the end. So, the Iterator should be finite to be
 [List]: List.md
 [Flow]: parallelism.md#flow
 [Range]: Range.md
 [Set]: Set.md
@@ -9,6 +9,9 @@ To implement the iterator you need to implement only two abstract methods:
 ### hasNext(): Bool
    // lets test
    // offset
 Should return `true` if call to `next()` will return valid next element.
 ### next(): Obj
@@ -20,6 +23,8 @@ must throw `ObjIterationFinishedError`.
 Iterators are returned when implementing [Iterable] interface.
 For high-performance Kotlin-side interop and custom iterable implementation details, see [Efficient Iterables in Kotlin Interop](EfficientIterables.md).
 ## Implemented for classes:
 - [List], [Range]
@@ -92,6 +92,34 @@ Open end ranges remove head and tail elements:
    assert( [1, 2, 3] !== [1, 2, 3])
    >>> void
 ## Destructuring
 Lists can be used as L-values for destructuring assignments. This allows you to unpack list elements into multiple variables.
 ### Basic Destructuring
 ```lyng
 val [a, b, c] = [1, 2, 3]
 ```
 ### With Splats (Variadic)
 A single ellipsis `...` can be used to capture remaining elements into a list. It can be placed at the beginning, middle, or end of the pattern.
 ```lyng
 val [head, rest...] = [1, 2, 3] // head=1, rest=[2, 3]
 val [first, middle..., last] = [1, 2, 3, 4, 5] // first=1, middle=[2, 3, 4], last=5
 ```
 ### Nested Patterns
 Destructuring patterns can be nested to unpack multi-dimensional lists.
 ```lyng
 val [a, [b, c...], d] = [1, [2, 3, 4], 5]
 ```
 ### Reassignment
 Destructuring can also be used to reassign existing variables:
 ```lyng
 [x, y] = [y, x] // Swap values
 ```
 ## In-place sort
 List could be sorted in place, just like [Collection] provide sorted copies, in a very like way:
@@ -130,7 +158,8 @@ List could be sorted in place, just like [Collection] provide sorted copies, in
 | `sort()`                      | in-place sort, natural order                 | void        |
 | `sortBy(predicate)`           | in-place sort bu `predicate` call result (3) | void        |
 | `sortWith(comparator)`        | in-place sort using `comarator` function (4) | void        |
-| `shiffle()`                   | in-place shiffle contents                    |             |
+| `shuffle()`                   | in-place shuffle contents                    |             |
 | `toString()`                 | string representation like `[a,b,c]`         |             |
 (1)
 : optimized implementation that override `Array` one
@@ -1,19 +1,22 @@
 # Map
-Map is a mutable collection of key-value pars, where keys are unique. Maps could be created with
+Map is a mutable collection of key-value pairs, where keys are unique. You can create maps in two ways:
-constructor or `.toMap` methods. When constructing from a list, each list item must be a [Collection] with exactly 2 elements, for example, a [List].
+- with the constructor `Map(...)` or `.toMap()` helpers; and
 - with map literals using braces: `{ "key": value, id: expr, id: }`.
 When constructing from a list, each list item must be a [Collection] with exactly 2 elements, for example, a [List].
 Important thing is that maps can't contain `null`: it is used to return from missing elements.
-Constructed map instance is of class `Map` and implements `Collection` (and therefore `Iterable`)
+Constructed map instance is of class `Map` and implements `Collection` (and therefore `Iterable`).
-    val map = Map( "foo" => 1, "bar" => "buzz" )
+    val oldForm = Map( "foo" => 1, "bar" => "buzz" )
-    assert(map is Map)
+    assert(oldForm is Map)
-    assert(map.size == 2)
+    assert(oldForm.size == 2)
-    assert(map is Iterable)
+    assert(oldForm is Iterable)
    >>> void
-Notice usage of the `=>` operator that creates `MapEntry`, which implements also [Collection] of
+Notice usage of the `=>` operator that creates `MapEntry`, which also implements [Collection] of
 two items, first, at index zero, is a key, second, at index 1, is the value. You can use lists too.
 Map keys could be any objects (hashable, e.g. with reasonable hashCode, most of standard types are). You can access elements with indexing operator:
@@ -29,6 +32,36 @@ Map keys could be any objects (hashable, e.g. with reasonable hashCode, most of
    assert( map["foo"] == -1)
    >>> void
 ## Map literals { ... }
 Lyng supports JavaScript-like map literals. Keys can be string literals or identifiers, and there is a handy identifier shorthand:
 - String key: `{ "a": 1 }`
 - Identifier key: `{ foo: 2 }` is the same as `{ "foo": 2 }`
 - Identifier shorthand: `{ foo: }` is the same as `{ "foo": foo }`
 Access uses brackets: `m["a"]`.
    val x = 10
    val y = 10
    val m = { "a": 1, x: x * 2, y: }
    assertEquals(1, m["a"])      // string-literal key
    assertEquals(20, m["x"])     // identifier key
    assertEquals(10, m["y"])     // identifier shorthand expands to y: y
    >>> void
 Trailing commas are allowed for nicer diffs and multiline formatting:
    val m = {
        "a": 1,
        b: 2,
    }
    assertEquals(1, m["a"]) 
    assertEquals(2, m["b"]) 
    >>> void
 Empty `{}` is reserved for blocks/lambdas; use `Map()` for an empty map.
 To remove item from the collection. use `remove`. It returns last removed item or null. Be careful if you 
 hold nulls in the map - this is not a recommended practice when using `remove` returned value. `clear()` 
 removes all.
@@ -110,4 +143,36 @@ is equal.
    assert( m1 != m3 )
    >>> void
 ## Spreads and merging
 Inside map literals you can spread another map with `...` and items will be merged left-to-right; rightmost wins:
    val base = { a: 1, b: 2 }
    val m = { a: 0, ...base, b: 3, c: 4 }
    assertEquals(1, m["a"])  // base overwrites a:0
    assertEquals(3, m["b"])  // literal overwrites spread
    assertEquals(4, m["c"])  // new key
    >>> void
 Maps and entries can also be merged with `+` and `+=`:
    val m1 = ("x" => 1) + ("y" => 2)
    assertEquals(1, m1["x"])
    assertEquals(2, m1["y"])
    val m2 = { "a": 10 } + ("b" => 20)
    assertEquals(10, m2["a"])
    assertEquals(20, m2["b"])
    var m3 = { a: 1 }
    m3 += ("b" => 2)
    assertEquals(1, m3["a"])
    assertEquals(2, m3["b"])
    >>> void
 Notes:
 - Map literals always use string keys (identifier keys are converted to strings).
 - Spreads inside map literals and `+`/`+=` merges allow any objects as keys.
 - When you need computed or non-string keys, use the constructor form `Map(...)`, map literals with computed keys (if supported), or build entries with `=>` and then merge.
 [Collection](Collection.md)
@@ -1,6 +1,10 @@
-# OO implementation in Lyng
+# Object-oriented programming
-## Declaration 
+[//]: # (topMenu)
 Lyng supports first class OOP constructs, based on classes with multiple inheritance.
 ## Class Declaration 
 The class clause looks like
@@ -38,6 +42,92 @@ a _constructor_ that requires two parameters for fields. So when creating it wit
 Form now on `Point` is a class, it's type is `Class`, and we can create instances with it as in the
 example above.
 ## Properties
 Properties allow you to define member accessors that look like fields but execute code when read or written. Unlike regular fields, properties in Lyng do **not** have automatic backing fields; they are pure accessors.
 ### Basic Syntax
 Properties are declared using `val` (read-only) or `var` (read-write) followed by a name and `get()`/`set()` blocks:
 ```kotlin
 class Person(private var _age: Int) {
    // Read-only property
    val ageCategory 
        get() {
            if (_age < 18) "Minor" else "Adult"
        }
    // Read-write property
    var age: Int
        get() { _age }
        set(value) {
            if (value >= 0) _age = value
        }
 }
 val p = Person(15)
 assertEquals("Minor", p.ageCategory)
 p.age = 20
 assertEquals("Adult", p.ageCategory)
 ```
 ### Laconic Expression Shorthand
 For simple accessors and methods, you can use the `=` shorthand for a more elegant and laconic form:
 ```kotlin
 class Circle(val radius: Real) {
    val area get() = π * radius * radius
    val circumference get() = 2 * π * radius
    fun diameter() = radius * 2
 }
 fun median(a, b) = (a + b) / 2
 class Counter {
    private var _count = 0
    var count get() = _count set(v) = _count = v
 }
 ```
 ### Key Rules
 - **`val` properties** must have a `get()` accessor and cannot have a `set()`.
 - **`var` properties** must have both `get()` and `set()` accessors.
 - **Functions and methods** can use the `=` shorthand to return the result of a single expression.
 - **No Backing Fields**: There is no magic `field` identifier. If you need to store state, you must declare a separate (usually `private`) field.
 - **Type Inference**: You can omit the type declaration if it can be inferred or if you don't need strict typing.
 ## Instance initialization: init block
 In addition to the primary constructor arguments, you can provide an `init` block that runs on each instance creation. This is useful for more complex initializations, side effects, or setting up fields that depend on multiple constructor parameters.
    class Point(val x, val y) {
       var magnitude
       init {
          magnitude = Math.sqrt(x*x + y*y)
       }
    }
 Key features of `init` blocks:
 - **Scope**: They have full access to `this` members and all primary constructor parameters.
 - **Order**: In a single-inheritance scenario, `init` blocks run immediately after the instance fields are prepared but before the primary constructor body logic.
 - **Multiple blocks**: You can have multiple `init` blocks; they will be executed in the order they appear in the class body.
 ### Initialization in Multiple Inheritance
 In cases of multiple inheritance, `init` blocks are executed following the constructor chaining rule:
 1. All ancestors are initialized first, following the inheritance hierarchy (diamond-safe: each ancestor is initialized exactly once).
 2. The `init` blocks of each class are executed after its parents have been fully initialized.
 3. For a hierarchy `class D : B, C`, the initialization order is: `B`'s chain, then `C`'s chain (skipping common ancestors with `B`), and finally `D`'s own `init` blocks.
 ### Initialization during Deserialization
 When an object is restored from a serialized form (e.g., using `Lynon`), `init` blocks are **re-executed**. This ensures that transient state or derived fields are correctly recalculated upon restoration. However, primary constructors are **not** re-called during deserialization; only the `init` blocks and field initializers are executed to restore the instance state.
 Class point has a _method_, or a _member function_ `length()` that uses its _fields_ `x` and `y` to
 calculate the magnitude. Length is called
@@ -49,8 +139,20 @@ statements discussed later, there could be default values, ellipsis, etc.
    class Point(x=0,y=0) 
    val p = Point()
    assert( p.x == 0 && p.y == 0 )
    // Named arguments in constructor calls use colon syntax:
    val p2 = Point(y: 10, x: 5)
    assert( p2.x == 5 && p2.y == 10 )
    // Auto-substitution shorthand for named arguments:
    val x = 1
    val y = 2
    val p3 = Point(x:, y:)
    assert( p3.x == 1 && p3.y == 2 )
    >>> void
 Note that unlike **Kotlin**, which uses `=` for named arguments, Lyng uses `:` to avoid ambiguity with assignment expressions.
 ## Methods
 Functions defined inside a class body are methods, and unless declared
@@ -71,6 +173,173 @@ Functions defined inside a class body are methods, and unless declared
    void
    >>> void
 ## Multiple Inheritance (MI)
 Lyng supports declaring a class with multiple direct base classes. The syntax is:
 ```
 class Foo(val a) {
    var tag = "F"
    fun runA() { "ResultA:" + a }
    fun common() { "CommonA" }
    private fun privateInFoo() {}
    protected fun protectedInFoo() {}
 }
 class Bar(val b) {
    var tag = "B"
    fun runB() { "ResultB:" + b }
    fun common() { "CommonB" }
 }
 // Multiple inheritance with per‑base constructor arguments
 class FooBar(a, b) : Foo(a), Bar(b) {
    // You can disambiguate via qualified this or casts
    fun fromFoo() { this@Foo.common() }
    fun fromBar() { this@Bar.common() }
 }
 val fb = FooBar(1, 2)
 assertEquals("ResultA:1", fb.runA())
 assertEquals("ResultB:2", fb.runB())
 // Unqualified ambiguous member resolves to the first base (leftmost)
 assertEquals("CommonA", fb.common())
 // Disambiguation via casts
 assertEquals("CommonB", (fb as Bar).common())
 assertEquals("CommonA", (fb as Foo).common())
 // Field inheritance with name collisions
 assertEquals("F", fb.tag)            // unqualified: leftmost base
 assertEquals("F", (fb as Foo).tag)   // qualified read: Foo.tag
 assertEquals("B", (fb as Bar).tag)   // qualified read: Bar.tag
 fb.tag = "X"                         // unqualified write updates leftmost base
 assertEquals("X", (fb as Foo).tag)
 assertEquals("B", (fb as Bar).tag)
 (fb as Bar).tag = "Y"                 // qualified write updates Bar.tag
 assertEquals("X", (fb as Foo).tag)
 assertEquals("Y", (fb as Bar).tag)
 ```
 Key rules and features:
 - Syntax
  - `class Derived(args) : Base1(b1Args), Base2(b2Args)`
  - Each direct base may receive constructor arguments specified in the header. Only direct bases receive header args; indirect bases must either be default‑constructible or receive their args through their direct child (future extensions may add more control).
 - Resolution order (C3 MRO — active)
  - Member lookup is deterministic and follows C3 linearization (Python‑like), which provides a monotonic, predictable order for complex hierarchies and diamonds.
  - Intuition: for `class D() : B(), C()` where `B()` and `C()` both derive from `A()`, the C3 order is `D → B → C → A`.
  - The first visible match along this order wins.
 - Qualified dispatch
  - Inside a class body, use `this@Type.member(...)` to start lookup at the specified ancestor.
  - For arbitrary receivers, use casts: `(expr as Type).member(...)` or `(expr as? Type)?.member(...)` (safe‑call `?.` is already available in Lyng).
  - Qualified access does not relax visibility.
 - Field inheritance (`val`/`var`) and collisions
  - Instance storage is kept per declaring class, internally disambiguated; unqualified read/write resolves to the first match in the resolution order (leftmost base).
  - Qualified read/write (via `this@Type` or casts) targets the chosen ancestor’s storage.
  - `val` remains read‑only; attempting to write raises an error as usual.
 - Constructors and initialization
  - During construction, direct bases are initialized left‑to‑right in the declaration order. Each ancestor is initialized at most once (diamond‑safe de‑duplication).
  - Arguments in the header are evaluated in the instance scope and passed to the corresponding direct base constructor.
  - The most‑derived class’s constructor runs after the bases.
 - Visibility
  - `private`: accessible only inside the declaring class body; not visible in subclasses and cannot be accessed via `this@Type` or casts.
  - `protected`: accessible in the declaring class and in any of its transitive subclasses (including MI), but not from unrelated contexts; qualification/casts do not bypass it.
 - Diagnostics
  - When a member/field is not found, error messages include the receiver class name and the considered linearization order, with suggestions to disambiguate using `this@Type` or casts if appropriate.
  - Qualifying with a non‑ancestor in `this@Type` reports a clear error mentioning the receiver lineage.
  - `as`/`as?` cast errors mention the actual and target types.
 Compatibility notes:
 - Existing single‑inheritance code continues to work unchanged; its resolution order reduces to the single base.
 - If your previous code accidentally relied on non‑deterministic parent set iteration, it may change behavior — the new deterministic order is a correctness fix.
 ### Migration note (declaration‑order → C3)
 Earlier drafts and docs described a declaration‑order depth‑first linearization. Lyng now uses C3 MRO for member lookup and disambiguation. Most code should continue to work unchanged, but in rare edge cases involving diamonds or complex multiple inheritance, the chosen base for an ambiguous member may change to reflect C3. If needed, disambiguate explicitly using `this@Type.member(...)` inside class bodies or casts `(expr as Type).member(...)` from outside.
 ## Enums
 Lyng provides lightweight enums for representing a fixed set of named constants. Enums are classes whose instances are predefined and singletons.
 Current syntax supports simple enum declarations with just entry names:
    enum Color {
        RED, GREEN, BLUE
    }
 Usage:
 - Type of entries: every entry is an instance of its enum type.
      assert( Color.RED is Color )
 - Order and names: each entry has zero‑based `ordinal` and string `name`.
      assertEquals(0, Color.RED.ordinal)
      assertEquals("BLUE", Color.BLUE.name)
 - All entries as a list in declaration order: `EnumType.entries`.
      assertEquals([Color.RED, Color.GREEN, Color.BLUE], Color.entries)
 - Lookup by name: `EnumType.valueOf("NAME")` → entry.
      assertEquals(Color.GREEN, Color.valueOf("GREEN"))
 - Equality and comparison:
  - Equality uses identity of entries, e.g., `Color.RED == Color.valueOf("RED")`.
  - Cross‑enum comparisons are not allowed.
  - Ordering comparisons use `ordinal`.
      assert( Color.RED == Color.valueOf("RED") )
      assert( Color.RED.ordinal < Color.BLUE.ordinal )
      >>> void
 ### Enums with `when`
 Use `when(subject)` with equality branches for enums. See full `when` guide: [The `when` statement](when.md).
    enum Color { RED, GREEN, BLUE }
    fun describe(c) {
        when(c) {
            Color.RED, Color.GREEN -> "primary-like"
            Color.BLUE -> "blue"
            else -> "unknown"   // if you pass something that is not a Color
        }
    }
    assertEquals("primary-like", describe(Color.RED))
    assertEquals("blue", describe(Color.BLUE))
    >>> void
 ### Serialization
 Enums are serialized compactly with Lynon: the encoded value stores just the entry ordinal within the enum type, which is both space‑efficient and fast.
    import lyng.serialization
    enum Color { RED, GREEN, BLUE }
    val e = Lynon.encode(Color.BLUE)
    val decoded = Lynon.decode(e)
    assertEquals(Color.BLUE, decoded)
    >>> void
 Notes and limitations (current version):
 - Enum declarations support only simple entry lists: no per‑entry bodies, no custom constructors, and no user‑defined methods/fields on the enum itself yet.
 - `name` and `ordinal` are read‑only properties of an entry.
 - `entries` is a read‑only list owned by the enum type.
 ## fields and visibility
 It is possible to add non-constructor fields:
@@ -130,6 +399,25 @@ Private fields are visible only _inside the class instance_:
    void
    >>> void
 ### Protected members
 Protected members are available to the declaring class and all of its transitive subclasses (including via MI), but not from unrelated contexts:
 ```
 class A() {
    protected fun ping() { "pong" }
 }
 class B() : A() {
    fun call() { this@A.ping() }
 }
 val b = B()
 assertEquals("pong", b.call())
 // Unrelated access is forbidden, even via cast
 assertThrows { (b as A).ping() }
 ```
 It is possible to provide private constructor parameters so they can be
 set at construction but not available outside the class:
@@ -203,9 +491,11 @@ As usual, private statics are not accessible from the outside:
 # Extending classes
-It sometimes happen that the class is missing some particular functionality that can be _added to it_ without rewriting its inner logic and using its private state. In this case _extension methods_ could be used, for example. we want to create an extension method
+It sometimes happen that the class is missing some particular functionality that can be _added to it_ without rewriting its inner logic and using its private state. In this case _extension members_ could be used.
-that would test if some object of unknown type contains something that can be interpreted
+
-as an integer. In this case we _extend_ class `Object`, as it is the parent class for any instance of any type:
+## Extension methods
 For example, we want to create an extension method that would test if some object of unknown type contains something that can be interpreted as an integer. In this case we _extend_ class `Object`, as it is the parent class for any instance of any type:
        fun Object.isInteger() {
            when(this) {
@@ -230,10 +520,67 @@ as an integer. In this case we _extend_ class `Object`, as it is the parent clas
        assert( ! "5.2".isInteger() )
        >>> void
-__Important note__ as for version 0.6.9, extensions are in __global scope__. It means, that once applied to a global type (Int in our sample), they will be available for _all_ contexts, even new created, 
+## Extension properties
 as they are modifying the type, not the context.
-Beware of it. We might need to reconsider it later.
+Just like methods, you can extend existing classes with properties. These can be defined using simple initialization (for `val` only) or with custom accessors.
 ### Simple val extension
 A read-only extension can be defined by assigning an expression:
 ```kotlin
 val String.isLong = length > 10
 val s = "Hello, world!"
 assert(s.isLong)
 ```
 ### Properties with accessors
 For more complex logic, use `get()` and `set()` blocks:
 ```kotlin
 class Box(var value: Int)
 var Box.doubledValue
    get() = value * 2
    set(v) = value = v / 2
 val b = Box(10)
 assertEquals(20, b.doubledValue)
 b.doubledValue = 30
 assertEquals(15, b.value)
 ```
 Extension members are strictly barred from accessing private members of the class they extend, maintaining encapsulation.
 ### Extension Scoping and Isolation
 Extensions in Lyng are **scope-isolated**. This means an extension is only visible within the scope where it is defined and its child scopes. This reduces the "attack surface" and prevents extensions from polluting the global space or other modules.
 #### Scope Isolation Example
 You can define different extensions with the same name in different scopes:
 ```kotlin
 fun scopeA() {
    val Int.description = "Number: " + toString()
    assertEquals("Number: 42", 42.description)
 }
 fun scopeB() {
    val Int.description = "Value: " + toString()
    assertEquals("Value: 42", 42.description)
 }
 scopeA()
 scopeB()
 // Outside those scopes, Int.description is not defined
 assertThrows { 42.description }
 ```
 This isolation ensures that libraries can use extensions internally without worrying about name collisions with other libraries or the user's code. When a module is imported using `use`, its top-level extensions become available in the importing scope.
 ## dynamic symbols
@@ -414,3 +761,8 @@ Regular methods are called on instances as usual `instance.method()`. The method
 TBD
 [argument list](declaring_arguments.md)
 ### Visibility from within closures and instance scopes
 When a closure executes within a method, the closure retains the lexical class context of its creation site. This means private/protected members of that class remain accessible where expected (subject to usual visibility rules). Field resolution checks the declaring class and validates access using the preserved `currentClassCtx`.
 See also: [Scopes and Closures: resolution and safety](scopes_and_closures.md)
@@ -0,0 +1,109 @@
 # Testing and Assertions
 Lyng provides several built-in functions for testing and verifying code behavior. These are available in all scripts.
 ## Basic Assertions
 ### `assert`
 Assert that a condition is true.
    assert(condition, message=null)
 - `condition`: A boolean expression.
 - `message` (optional): A string message to include in the exception if the assertion fails.
 If the condition is false, it throws an `AssertionFailedException`.
 ```lyng
 assert(1 + 1 == 2)
 assert(true, "This should be true")
 ```
 ### `assertEquals` and `assertEqual`
 Assert that two values are equal. `assertEqual` is an alias for `assertEquals`.
    assertEquals(expected, actual)
    assertEqual(expected, actual)
 If `expected != actual`, it throws an `AssertionFailedException` with a message showing both values.
 ```lyng
 assertEquals(4, 2 * 2)
 assertEqual("hello", "hel" + "lo")
 ```
 ### `assertNotEquals`
 Assert that two values are not equal.
    assertNotEquals(unexpected, actual)
 If `unexpected == actual`, it throws an `AssertionFailedException`.
 ```lyng
 assertNotEquals(5, 2 * 2)
 ```
 ## Exception Testing
 ### `assertThrows`
 Assert that a block of code throws an exception.
    assertThrows(code)
    assertThrows(expectedExceptionClass, code)
 - `expectedExceptionClass` (optional): The class of the exception that is expected to be thrown.
 - `code`: A lambda block or statement to execute.
 If the code does not throw an exception, an `AssertionFailedException` is raised. 
 If an `expectedExceptionClass` is provided, the thrown exception must be of that class (or its subclass), otherwise an error is raised.
 `assertThrows` returns the caught exception object if successful.
 ```lyng
 // Just assert that something is thrown
 assertThrows { 1 / 0 }
 // Assert that a specific exception class is thrown
 assertThrows(NoSuchElementException) { 
    [1, 2, 3].findFirst { it > 10 } 
 }
 // You can use the returned exception
 val ex = assertThrows { throw Exception("custom error") }
 assertEquals("custom error", ex.message)
 ```
 ## Other Validation Functions
 While not strictly for testing, these functions help in defensive programming:
 ### `require`
    require(condition, message="requirement not met")
 Throws an `IllegalArgumentException` if the condition is false. Use this for validating function arguments.
 If we want to evaluate the message lazily:
    require(condition) { "requirement not met: %s"(someData) }
 In this case, formatting will only occur if the condition is not met.
 ### `check`
    check(condition, message="check failed")
 Throws an `IllegalStateException` if the condition is false. Use this for validating internal state.
 With lazy message evaluation:
    check(condition) { "check failed: %s"(someData) }
 In this case, formatting will only occur if the condition is not met.
@@ -158,3 +158,9 @@ Function annotation can have more args specified at call time. There arguments m
    >>> void
 [parallelism]: parallelism.md
 ## Scopes and Closures: resolution and safety
 Closures and dynamic scope graphs require care to avoid accidental recursion and to keep name resolution predictable. See the dedicated page for detailed rules, helper APIs, and best practices:
 - Scopes and Closures: resolution and safety → [scopes_and_closures.md](scopes_and_closures.md)
@@ -1,24 +0,0 @@
 # Classes
 ## Declaring
    class Foo1
    class Foo2() // same, empty constructor
    class Foo3() { // full
    }
    class Foo4 { // Only body
    }
 ```
 class_declaration = ["abstract",] "class" [, constructor] [, body]
 constructor = "(", [field [, field]] ")
 field = [visibility ,] [access ,] name [, typedecl]
 body = [visibility] ("var", vardecl) | ("val", vardecl) | ("fun", fundecl)
 visibility = "private" | "protected" | "internal"
 ```
 ### Abstract classes
 Contain one pr more abstract methods which must be implemented; though they
 can have constructors, the instances of the abstract classes could not be
 created independently
@@ -1,11 +1,13 @@
 # Declaring arguments in Lyng
 [//]: # (topMenu)
 It is a common thing that occurs in many places in Lyng, function declarations, 
 lambdas and class declarations.
 ## Regular
-## default values
+## Default values
 Default parameters should not be mixed with mandatory ones:
@@ -73,6 +75,13 @@ destructuring arrays when calling functions and lambdas:
    getFirstAndLast( ...(1..10) ) // see "splats" section below
    >>> [1,10]
 Note that array destructuring can also be used in assignments:
    val [first, middle..., last] = [1, 2, 3, 4, 5]
    [x, y] = [y, x] // Swap
 See [tutorial] and [List] documentation for more details on destructuring assignments.
 # Splats
 Ellipsis allows to convert argument lists to lists. The inversa algorithm that converts [List],
@@ -96,5 +105,73 @@ There could be any number of splats at any positions. You can splat any other [I
    >>> [start,1,2,3,end]
    >>> void
 ## Named arguments in calls
 Lyng supports named arguments at call sites using colon syntax `name: value`. 
 ### Shorthand for Named Arguments
 If you want to pass a variable as a named argument and the variable has the same name as the parameter, you can omit the value and use the shorthand `name:`. This is highly readable and matches the shorthand for map literals.
 ```lyng
    fun test(a, b, c) { [a, b, c] }
    val a = 1
    val b = 2
    val c = 3
    // Explicit:
    assertEquals([1, 2, 3], test(a: a, b: b, c: c))
    // Shorthand (preferred):
    assertEquals([1, 2, 3], test(a:, b:, c:))
 ```
 This shorthand is elegant, reduces boilerplate, and is consistent with Lyng's map literal syntax. It works for both function calls and class constructors.
 Rules for named arguments:
 - Named arguments must follow positional arguments. After the first named argument, no positional arguments may appear inside the parentheses.
 - The only exception is the syntactic trailing block after the call: `f(args) { ... }`. This block is outside the parentheses and is handled specially (see below).
 - A named argument cannot reassign a parameter already set positionally.
 - If the last parameter has already been assigned by a named argument (or named splat), a trailing block is not allowed and results in an error.
 Why `:` and not `=` at call sites? In Lyng, `=` is an expression (assignment), so we use `:` to avoid ambiguity. This is a key difference from **Kotlin**, which uses `=` for named arguments. Declarations in Lyng continue to use `:` for types, while call sites use `as` / `as?` for type operations.
 ## Named splats (map splats)
 Splat (`...`) of a Map provides named arguments to the call. Only string keys are allowed. You can use the same auto-substitution shorthand inside map literals used for splats:
 ```lyng
    fun test(a="a", b="b", c="c", d="d") { [a, b, c, d] }
    val b = "B!"
    val d = "D!"
    // Auto-substitution in map literal:
    val patch = { d:, b: }
    val r = test("A?", ...patch)
    assertEquals(["A?","B!","c","D!"], r)
 ```
 Constraints:
 - Map splat keys must be strings; otherwise, a clean error is thrown.
 - Named splats cannot duplicate parameters already assigned (by positional or named arguments).
 - Named splats must follow all positional arguments and positional splats.
 - Ellipsis parameters (variadic) remain positional-only and cannot be assigned by name.
 ## Trailing-lambda rule interaction
 If a call is immediately followed by a block `{ ... }`, it is treated as an extra last argument and bound to the last parameter. However, if the last parameter is already assigned by a named argument or a named splat, using a trailing block is an error:
 ```lyng
    fun f(x, onDone) { onDone(x) }
    f(x: 1) { 42 }   // ERROR
    f(1) { 42 }      // OK
 ```
 [tutorial]: tutorial.md
 [List]: List.md
@@ -1,3 +1,5 @@
 [//]: # (excludeFromIndex)
 # String
 # This document is for developer notes only
@@ -1,5 +1,7 @@
 # Modules inclusion
 [//]: # (excludeFromIndex)
 Module is, at the low level, a statement that modifies a given context by adding
 here local and exported symbols, performing some tasks and even returning some value
 we don't need for now.
@@ -1,3 +1,4 @@
 [//]: # (excludeFromIndex)
 Provide:
@@ -0,0 +1,291 @@
 # Embedding Lyng in your Kotlin project
 Lyng is a tiny, embeddable, Kotlin‑first scripting language. This page shows, step by step, how to:
 - add Lyng to your build
 - create a runtime and execute scripts
 - define functions and variables from Kotlin
 - read variable values back in Kotlin
 - call Lyng functions from Kotlin
 - create your own packages and import them in Lyng
 All snippets below use idiomatic Kotlin and rely on Lyng public APIs. They work on JVM and other Kotlin Multiplatform targets supported by `lynglib`.
 Note: all Lyng APIs shown are `suspend`, because script evaluation is coroutine‑friendly and can suspend.
 ### 1) Add Lyng to your build
 Add the repository where you publish Lyng artifacts and the dependency on the core library `lynglib`.
 Gradle Kotlin DSL (build.gradle.kts):
 ```kotlin
 repositories {
    // Your standard repos
    mavenCentral()
    // If you publish to your own Maven (example: Gitea packages). Adjust URL/token as needed.
    maven(url = uri("https://gitea.sergeych.net/api/packages/SergeychWorks/maven"))
 }
 dependencies {
    // Multiplatform: place in appropriate source set if needed
    implementation("net.sergeych:lynglib:1.0.0-SNAPSHOT")
 }
 ```
 If you use Kotlin Multiplatform, add the dependency in the `commonMain` source set (and platform‑specific sets if you need platform APIs).
 ### 2) Create a runtime (Scope) and execute scripts
 The easiest way to get a ready‑to‑use scope with standard packages is via `Script.newScope()`.
 ```kotlin
 fun main() = kotlinx.coroutines.runBlocking {
    val scope = Script.newScope() // suspends on first init
    // Evaluate a one‑liner
    val result = scope.eval("1 + 2 * 3")
    println("Lyng result: $result") // ObjReal/ObjInt etc.
 }
 ```
 You can also pre‑compile a script and execute it multiple times:
 ```kotlin
 val script = Compiler.compile("""
    // any Lyng code
    val x = 40 + 2
    x
 """)
 val run1 = script.execute(scope)
 val run2 = script.execute(scope)
 ```
 `Scope.eval("...")` is a shortcut that compiles and executes on the given scope.
 ### 3) Define variables from Kotlin
 To expose data to Lyng, add constants (read‑only) or mutable variables to the scope. All values in Lyng are `Obj` instances; the core types live in `net.sergeych.lyng.obj`.
 ```kotlin
 // Read‑only constant
 scope.addConst("pi", ObjReal(3.14159))
 // Mutable variable: create or update
 scope.addOrUpdateItem("counter", ObjInt(0))
 // Use it from Lyng
 scope.eval("counter = counter + 1")
 ```
 Tip: Lyng values can be converted back to Kotlin with `toKotlin(scope)`:
 ```kotlin
 val current = (scope.eval("counter")).toKotlin(scope) // Any? (e.g., Int/Double/String/List)
 ```
 ### 4) Add Kotlin‑backed functions
 Use `Scope.addFn`/`addVoidFn` to register functions implemented in Kotlin. Inside the lambda, use `this.args` to access arguments and return an `Obj`.
 ```kotlin
 // A function returning value
 scope.addFn<ObjInt>("inc") {
    val x = args.firstAndOnly() as ObjInt
    ObjInt(x.value + 1)
 }
 // A void function (returns Lyng Void)
 scope.addVoidFn("log") {
    val items = args.list // List<Obj>
    println(items.joinToString(" ") { it.toString(this).value })
 }
 // Call them from Lyng
 scope.eval("val y = inc(41); log('Answer:', y)")
 ```
 You can register multiple names (aliases) at once: `addFn<ObjInt>("inc", "increment") { ... }`.
 ### 5) Add Kotlin‑backed fields
 If you need a simple field (with a value) instead of a computed property, use `createField`. This adds a field to the class that will be present in all its instances.
 ```kotlin
 val myClass = ObjClass("MyClass")
 // Add a read-only field (constant)
 myClass.createField("version", ObjString("1.0.0"), isMutable = false)
 // Add a mutable field with an initial value
 myClass.createField("count", ObjInt(0), isMutable = true)
 scope.addConst("MyClass", myClass)
 ```
 In Lyng:
 ```lyng
 val instance = MyClass()
 println(instance.version) // -> "1.0.0"
 instance.count = 5
 println(instance.count)   // -> 5
 ```
 ### 6) Add Kotlin‑backed properties
 Properties in Lyng are pure accessors (getters and setters) and do not have automatic backing fields. You can add them to a class using `addProperty`.
 ```kotlin
 val myClass = ObjClass("MyClass")
 var internalValue: Long = 10
 myClass.addProperty(
    name = "value",
    getter = { 
        // Return current value as a Lyng object
        ObjInt(internalValue) 
    },
    setter = { newValue ->
        // newValue is passed as a Lyng object (the first and only argument)
        internalValue = (newValue as ObjInt).value
    }
 )
 scope.addConst("MyClass", myClass)
 ```
 Usage in Lyng:
 ```lyng
 val instance = MyClass()
 println(instance.value) // -> 10
 instance.value = 42
 println(instance.value) // -> 42
 ```
 ### 7) Read variable values back in Kotlin
 The simplest approach: evaluate an expression that yields the value and convert it.
 ```kotlin
 val kotlinAnswer = scope.eval("(1 + 2) * 3").toKotlin(scope) // -> 9 (Int)
 // After scripts manipulate your vars:
 scope.addOrUpdateItem("name", ObjString("Lyng"))
 scope.eval("name = name + ' rocks!'")
 val kotlinName = scope.eval("name").toKotlin(scope) // -> "Lyng rocks!"
 ```
 Advanced: you can also grab a variable record directly via `scope.get(name)` and work with its `Obj` value, but evaluating `"name"` is often clearer and enforces Lyng semantics consistently.
 ### 8) Execute scripts with parameters; call Lyng functions from Kotlin
 There are two convenient patterns.
 1) Evaluate a Lyng call expression directly:
 ```kotlin
 // Suppose Lyng defines: fun add(a, b) = a + b
 scope.eval("fun add(a, b) = a + b")
 val sum = scope.eval("add(20, 22)").toKotlin(scope) // -> 42
 ```
 2) Call a Lyng function by name via a prepared call scope:
 ```kotlin
 // Ensure the function exists in the scope
 scope.eval("fun add(a, b) = a + b")
 // Look up the function object
 val addFn = scope.get("add")!!.value as Statement
 // Create a child scope with arguments (as Lyng Objs)
 val callScope = scope.createChildScope(
    args = Arguments(listOf(ObjInt(20), ObjInt(22)))
 )
 val resultObj = addFn.execute(callScope)
 val result = resultObj.toKotlin(scope) // -> 42
 ```
 If you need to pass complex data (lists, maps), construct the corresponding Lyng `Obj` types (`ObjList`, `ObjMap`, etc.) and pass them in `Arguments`.
 ### 9) Create your own packages and import them in Lyng
 Lyng supports packages that are imported from scripts. You can register packages programmatically via `ImportManager` or by providing source texts that declare `package ...`.
 Key concepts:
 - `ImportManager` holds package registrations and lazily builds `ModuleScope`s when first imported.
 - Every `Scope` has `currentImportProvider` and (if it’s an `ImportManager`) a convenience `importManager` to register packages.
 Register a Kotlin‑built package:
 ```kotlin
 val scope = Script.newScope()
 // Access the import manager behind this scope
 val im: ImportManager = scope.importManager
 // Register a package "my.tools"
 im.addPackage("my.tools") { module: ModuleScope ->
    // Expose symbols inside the module scope
    module.addConst("version", ObjString("1.0"))
    module.addFn<ObjInt>("triple") {
        val x = args.firstAndOnly() as ObjInt
        ObjInt(x.value * 3)
    }
 }
 // Use it from Lyng
 scope.eval("""
    import my.tools.*
    val v = triple(14)
 """)
 val v = scope.eval("v").toKotlin(scope) // -> 42
 ```
 Register a package from Lyng source text:
 ```kotlin
 val pkgText = """
    package math.extra
    fun sqr(x) = x * x
 """.trimIndent()
 scope.importManager.addTextPackages(pkgText)
 scope.eval("""
    import math.extra.*
    val s = sqr(12)
 """)
 val s = scope.eval("s").toKotlin(scope) // -> 144
 ```
 You can also register from parsed `Source` instances via `addSourcePackages(source)`.
 ### 10) Executing from files, security, and isolation
 - To run code from a file, read it and pass to `scope.eval(text)` or compile with `Compiler.compile(Source(fileName, text))`.
 - `ImportManager` takes an optional `SecurityManager` if you need to restrict what packages or operations are available. By default, `Script.defaultImportManager` allows everything suitable for embedded use; clamp it down in sandboxed environments.
 - For isolation, create fresh modules/scopes via `Scope.new()` or `Script.newScope()` when you need a clean environment per request.
 ```kotlin
 // Fresh module based on the default manager, without the standard prelude
 val isolated = net.sergeych.lyng.Scope.new()
 ```
 ### 11) Tips and troubleshooting
 - All values that cross the boundary must be Lyng `Obj` instances. Convert Kotlin values explicitly (e.g., `ObjInt`, `ObjReal`, `ObjString`).
 - Use `toKotlin(scope)` to get Kotlin values back. Collections convert to Kotlin collections recursively.
 - Most public API in Lyng is suspendable. If you are not already in a coroutine, wrap calls in `runBlocking { ... }` on the JVM for quick tests.
 - When registering packages, names must be unique. Register before you compile/evaluate scripts that import them.
 - To debug scope content, `scope.toString()` and `scope.trace()` can help during development.
 ---
 That’s it. You now have Lyng embedded in your Kotlin app: you can expose your app’s API, evaluate user scripts, and organize your own packages to import from Lyng code.
@@ -169,3 +169,18 @@ _this functionality is not yet released_
 | UnknownException           | unexpected kotlin exception caught                    |
 |                            |                                                       |
 ### Symbol resolution errors
 For compatibility, `SymbolNotFound` is an alias of `SymbolNotDefinedException`. You can catch either name in examples and tests.
 Example:
 ```lyng
 try {
    nonExistingMethod()
 }
 catch(e: SymbolNotFound) {
    // handle
 }
 ```
@@ -0,0 +1,34 @@
 ## Fix: prevent cycles in scope parent chain during pooled frame reuse
 ### What changed
 - Scope.resetForReuse now fully detaches a reused scope from its previous chain/state before re-parenting:
  - sets `parent = null` and regenerates `frameId`
  - clears locals/slots/bindings caches
  - only after that, validates the new parent with `ensureNoCycle` and assigns it
 - ScopePool.borrow on all targets (JVM, Android, JS, Native, Wasm) now has a defensive fallback:
  - if `resetForReuse` throws `IllegalStateException` indicating a parent-chain cycle, the pool allocates a fresh `Scope` instead of failing.
 ### Why
 In some nested call patterns (notably instance method calls where an instance is produced by another function and immediately used), the same pooled `Scope` object can be rebound into a chain that already (transitively) contains it. Reassigning `parent` in that case forms a structural cycle, which `ensureNoCycle` correctly detects and throws. This could surface as:
 ```
 IllegalStateException: cycle detected in scope parent chain assignment
  at net.sergeych.lyng.Scope.ensureNoCycle(...)
  at net.sergeych.lyng.Scope.resetForReuse(...)
  at net.sergeych.lyng.ScopePool.borrow(...)
  ... during instance method invocation
 ```
 The fix removes the failure mode by:
 1) Detaching the reused frame from its prior chain/state before validating and assigning the new parent.
 2) Falling back to a new frame allocation if a cycle is still detected (extremely rare and cheap vs. a crash).
 ### Expected effects
 - Eliminates sporadic `cycle detected in scope parent chain` crashes during instance method invocation.
 - No change to public API or normal semantics.
 - Pooling remains enabled by default; the fallback only triggers on the detected cycle edge case.
 - Negligible performance impact: fresh allocation is used only when a cycle would have crashed the VM previously.
 ### Notes
 - The fix is platform-wide (all ScopePool actuals are covered).
 - We recommend adding/keeping a regression test that exercises: a class with a method, a function returning an instance, and an exported function calling the instance method. The test should pass without exceptions.
@@ -0,0 +1,62 @@
 # Lyng formatter (core, CLI, and IDE)
 This document describes the Lyng code formatter included in this repository. The formatter lives in the core library (`:lynglib`), is available from the CLI (`lyng fmt`), and is used by the IntelliJ plugin.
 ## Core library
 Package: `net.sergeych.lyng.format`
 - `LyngFormatConfig`
  - `indentSize` (default 4)
  - `useTabs` (default false)
  - `continuationIndentSize` (default 8)
  - `maxLineLength` (default 120)
  - `applySpacing` (default false)
  - `applyWrapping` (default false)
 - `LyngFormatter`
  - `reindent(text, config)` — recomputes indentation from scratch (braces, `else/catch/finally` alignment, continuation indent under `(` `)` and `[` `]`), idempotent.
  - `format(text, config)` — runs `reindent` and, depending on `config`, optionally applies:
    - a safe spacing pass (commas/operators/colons/keyword parens; member access `.` remains tight; no changes to strings/comments), and
    - a controlled wrapping pass for long call arguments (no trailing commas).
 Both passes are designed to be idempotent. Extensive tests live under `:lynglib/src/commonTest/.../format`.
 ## CLI formatter
 ```
 lyng fmt [--check] [--in-place|-i] [--spacing] [--wrap] <file1.lyng> [file2.lyng ...]
 ```
 - Defaults: indent-only; spacing and wrapping are OFF unless flags are provided.
 - `--check` prints files that would change and exits with code 2 if any changes are detected.
 - `--in-place`/`-i` rewrites files in place (default if not using `--check`).
 - `--spacing` enables the safe spacing pass (commas/operators/colons/keyword parens).
 - `--wrap` enables controlled wrapping of long call argument lists (respects `maxLineLength`, no trailing commas).
 Examples:
 ```
 # check formatting without modifying files
 lyng fmt --check docs/samples/fs_sample.lyng
 # format in place with spacing rules enabled
 lyng fmt --spacing -i docs/samples/fs_sample.lyng
 # format in place with spacing + wrapping
 lyng fmt --spacing --wrap -i src/**/*.lyng
 ```
 ## IntelliJ plugin
 - Indentation: always enabled, idempotent; the plugin computes per-line indent via the core formatter.
 - Spacing/wrapping: optional and OFF by default.
  - Settings/Preferences → Lyng Formatter provides toggles:
    - "Enable spacing normalization (commas/operators/colons/keyword parens)"
    - "Enable line wrapping (120 cols) [experimental]"
  - Reformat Code applies: indentation first, then spacing, then wrapping if toggled.
 ## Design notes
 - Single source of truth: The core formatter is used by CLI and IDE to keep behavior consistent.
 - Stability first: Spacing/wrapping are gated by flags/toggles; indentation from scratch is always safe and idempotent.
 - Non-destructive: The formatter carefully avoids changing string/char literals and comment contents.
@@ -0,0 +1,29 @@
 # Plugin for IntelliJ IDEA
 [//]: # (excludeFromIndex)
 We introduce the alpha version of the plugin for IntelliJ IDEA 2024.3.x+ IDE variants. It is compatible with 2025.x and
 should be compatible with other IDEA flavors, notably [OpenIDE](https://openide.ru/). It supports the following features:
 - syntax highlighting (2 stage, fast and more accurate that analyses in background)
 - reformat code (indents, spaces)
 - reformat on paste
 - smart enter key
 Features are configurable via the plugin settings page, in system settings.
 > Recommended for IntelliJ-based IDEs: While IntelliJ can import TextMate bundles
 > (Settings/Preferences → Editor → TextMate Bundles), the native Lyng plugin provides
 > better support (formatting, smart enter, background analysis, etc.). Prefer installing
 > this plugin over using a TextMate bundle.
 ### Install
 - From ZIP: download the archive below, then in IntelliJ IDEA open Settings/Preferences → Plugins →
  gear icon → Install Plugin from Disk… and select the downloaded ZIP. Restart IDE if prompted.
 - Alternatively, if/when the plugin is published to a marketplace, you will be able to install it
  directly from the “Marketplace” tab (not yet available).
 ### [Download plugin v0.0.2-SNAPSHOT](https://lynglang.com/distributables/lyng-idea-0.0.2-SNAPSHOT.zip)
 Your ideas and bugreports are welcome on the [project gitea page](https://gitea.sergeych.net/SergeychWorks/lyng/issues)
@@ -0,0 +1,167 @@
 # Json support
 Since 1.0.5 we start adding JSON support. Versions 1,0,6* support serialization of the basic types, including lists and
 maps, and simple classes. Multiple inheritance may produce incorrect results, it is work in progress.
 ## Serialization in Lyng
    // in lyng
    assertEquals("{\"a\":1}", {a: 1}.toJsonString())
    void
    >>> void
 Simple classes serialization is supported:
    import lyng.serialization
    class Point(foo,bar) {
        val t = 42
    }
    // val is not serialized
    assertEquals( "{\"foo\":1,\"bar\":2}", Point(1,2).toJsonString() )
    >>> void
 Note that mutable members are serialized:
    import lyng.serialization
    class Point2(foo,bar) {
        var reason = 42
        // but we override json serialization:
        fun toJsonObject() {
            { "custom": true }
        }
    }
    // var is serialized instead
    assertEquals( "{\"custom\":true}", Point2(1,2).toJsonString() )
    >>> void
 Custom serialization of user classes is possible by overriding `toJsonObject` method. It must return an object which is
 serializable to Json. Most often it is a map, but any object is accepted, that makes it very flexible:
    import lyng.serialization
    class Point2(foo,bar) {
        var reason = 42
        // but we override json serialization:
        fun toJsonObject() {
            { "custom": true }
        }
    }
    class Custom {
        fun toJsonObject() {
            "full freedom"
        }
    }
    // var is serialized instead
    assertEquals( "\"full freedom\"", Custom().toJsonString() )
    >>> void
 Please note that `toJsonString` should be used to get serialized string representation of the object. Don't call
 `toJsonObject` directly, it is not intended to be used outside the serialization library.
 ## Kotlin side interfaces
 The "Batteries included" principle is also applied to serialization.
 - `Obj.toJson()` provides Kotlin `JsonElement`
 - `Obj.toJsonString()` provides Json string representation
 - `Obj.decodeSerializableWith()` and `Obj.decodeSerializable()` allows to decode Lyng classes as Kotlin objects using
  `kotlinx.serialization`:
 ```kotlin
 /**
 * Decodes the current object into a deserialized form using the provided deserialization strategy.
 * It is based on [Obj.toJson] and uses existing Kotlin Json serialization, without string representation
 * (only `JsonElement` to carry information between Kotlin and Lyng serialization worlds), thus efficient.
 *
 * @param strategy The deserialization strategy that defines how the object should be decoded.
 * @param scope An optional scope used during deserialization to define the context. Defaults to a new instance of Scope.
 * @return The deserialized object of type T.
 */
 suspend fun <T> Obj.decodeSerializableWith(strategy: DeserializationStrategy<T>, scope: Scope = Scope()): T =
    Json.decodeFromJsonElement(strategy, toJson(scope))
 /**
 * Decodes a serializable object of type [T] using the provided decoding scope. The deserialization uses
 * [Obj.toJson] and existing Json based serialization ithout using actual string representation, thus
 * efficient.
 *
 * @param T The type of the object to be decoded. Must be a reified type.
 * @param scope The scope used during decoding. Defaults to a new instance of [Scope].
 */
 suspend inline fun <reified T> Obj.decodeSerializable(scope: Scope = Scope()) =
    decodeSerializableWith<T>(serializer<T>(), scope)
 ```
 Note that lyng-2-kotlin deserialization with `kotlinx.serialization` uses JsonElement as information carrier without
 formatting and parsing actual Json strings. This is why we use `Json.decodeFromJsonElement` instead of
 `Json.decodeFromString`. Such an approach gives satisfactory performance without writing and supporting custom
 `kotlinx.serialization` codecs.
 ### Pitfall: JSON objects and Map<String, Any?>
 Kotlin serialization does not support `Map<String, Any?>` as a serializable type, more general, it can't serialize `Any`. This in particular means that you can deserialize Kotlin `Map<String, T>` as long as `T` is `@Serializable` in Kotlin: 
 ```kotlin
@Serializable
 data class TestJson2(
    val value: Int,
    val inner: Map<String,Int>
 )
@Test
 fun deserializeMapWithJsonTest() = runTest {
    val x = eval("""
        import lyng.serialization
        { value: 1, inner: { "foo": 1, "bar": 2 }}
    """.trimIndent()).decodeSerializable<TestJson2>()
    // That works perfectly well:
    assertEquals(TestJson2(1, mapOf("foo" to 1, "bar" to 2)), x)
 }
 ```
 But what if your map has objects of different types? The approach of using polymorphism is partially applicable, but what to do with `{ one: 1, two: "two" }`?
 The answer is pretty simple: use `JsonObject` in your deserializable object. This class is capable of holding any JSON types and structures and is sort of a silver bullet for such cases:
 ~~~kotlin
@Serializable
 data class TestJson3(
    val value: Int,
    val inner: JsonObject
 )
@Test
 fun deserializeAnyMapWithJsonTest() = runTest {
    val x = eval("""
        import lyng.serialization
        { value: 12, inner: { "foo": 1, "bar": "two" }}
    """.trimIndent()).decodeSerializable<TestJson3>()
    assertEquals(TestJson3(12, JsonObject(mapOf("foo" to JsonPrimitive(1), "bar" to Json.encodeToJsonElement("two")))), x)
 }
 ~~~
 # List of supported types
 | Lyng type | JSON type | notes       |
 |-----------|-----------|-------------|
 | `Int`     | number    |             |
 | `Real`    | number    |             |
 | `String`  | string    |             |
 | `Bool`    | boolean   |             |
 | `null`    | null      |             |
 | `Instant` | string    | ISO8601 (1) |
 | `List`    | array     | (2)         |
 | `Map`     | object    | (2)         |
 (1)
 : ISO8601 flavor 1970-05-06T06:00:00.000Z in used; number of fractional digits depends on the truncation
 on [Instant](time.md), see `Instant.truncateTo...` functions.
 (2)
 : List may contain any objects serializable to Json.
 (3)
 : Map keys must be strings, map values may be any objects serializable to Json.
@@ -0,0 +1,228 @@
 ### lyng.io.fs — async filesystem access for Lyng scripts
 This module provides a uniform, suspend-first filesystem API to Lyng scripts, backed by Kotlin Multiplatform implementations.
 - JVM/Android/Native: Okio `FileSystem.SYSTEM` (non-blocking via coroutine dispatcher)
 - JS/Node: Node filesystem (currently via Okio node backend; a native `fs/promises` backend is planned)
 - JS/Browser and Wasm: in-memory virtual filesystem for now
 It exposes a Lyng class `Path` with methods for file and directory operations, including streaming readers for large files.
 It is a separate library because access to teh filesystem is a security risk we compensate with a separate API that user must explicitly include to the dependency and allow. Together with `FsAceessPolicy` that is required to `createFs()` which actually adds the filesystem to the scope, the security risk is isolated.
 Also, it helps keep Lyng core small and focused.
 ---
 #### Add the library to your project (Gradle)
 If you use this repository as a multi-module project, add a dependency on `:lyngio`:
 ```kotlin
 dependencies {
    implementation("net.sergeych:lyngio:0.0.1-SNAPSHOT")
 }
 ```
 Note on maven repository. Lyngio uses ths same maven as Lyng code (`lynglib`) so it is most likely already in your project. If ont, add it to the proper section of your `build.gradle.kts` or settings.gradle.kts:
 ```kotlin
    repositories {
        maven("https://gitea.sergeych.net/api/packages/SergeychWorks/maven")
    }
 ```
 This brings in:
 - `:lynglib` (Lyng engine)
 - Okio (`okio`, `okio-fakefilesystem`, and `okio-nodefilesystem` for JS)
 - Kotlin coroutines
 ---
 #### Install the module into a Lyng Scope
 The filesystem module is not installed automatically. You must explicitly register it in the scope’s `ImportManager` using the installer. You can customize access control via `FsAccessPolicy`.
 Kotlin (host) bootstrap example (imports omitted for brevity):
 ```kotlin
 val scope: Scope = Scope.new()
 val installed: Boolean = createFs(PermitAllAccessPolicy, scope)
 // installed == true on first registration in this ImportManager, false on repeats
 // In scripts (or via scope.eval), import the module to use its symbols:
 scope.eval("import lyng.io.fs")
 ```
 You can install with a custom policy too (see Access policy below).
 ---
 #### Using from Lyng scripts
 ```lyng
 val p = Path("/tmp/hello.txt")
 // Text I/O
 p.writeUtf8("Hello Lyng!\n")
 println(p.readUtf8())
 // Binary I/O
 val data = Buffer.fromHex("deadbeef")
 p.writeBytes(data)
 // Existence and directories
 assertTrue(p.exists())
 Path("/tmp/work").mkdirs()
 // Listing
 for (entry in Path("/tmp").list()) {
    println(entry)
 }
 // Globbing
 val txts = Path("/tmp").glob("**/*.txt").toList()
 // Copy / Move / Delete
 Path("/tmp/a.txt").copy("/tmp/b.txt", overwrite=true)
 Path("/tmp/b.txt").move("/tmp/c.txt", overwrite=true)
 Path("/tmp/c.txt").delete()
 // Streaming large files (does not load whole file into memory)
 var bytes = 0
 val it = Path("/tmp/big.bin").readChunks(1_048_576) // 1MB chunks
 val iter = it.iterator()
 while (iter.hasNext()) {
    val chunk = iter.next()
    bytes = bytes + chunk.size()
 }
 // Text chunks and lines
 for (s in Path("/tmp/big.txt").readUtf8Chunks(64_000)) {
    // process each string chunk
 }
 for (ln in Path("/tmp/big.txt").lines()) {
    // process line by line
 }
 ```
 ---
 #### API (Lyng class `Path`)
 Constructor:
 - `Path(path: String)` — creates a Path object
 - `Paths(path: String)` — alias
 File and directory operations (all suspend under the hood):
 - `name`: name, `String`
 - `segments`: list of parsed path segments (directories)
 - `parent`: parent directory, `Path?`; null if root
 - `exists(): Bool`
 - `isFile(): Bool` — true if the path points to a regular file (cached metadata)
 - `isDirectory(): Bool` — true if the path points to a directory (cached metadata)
 - `size(): Int?` — size in bytes or null if unknown (cached metadata)
 - `createdAt(): Instant?` — creation time as Lyng `Instant`, or null (cached metadata)
 - `createdAtMillis(): Int?` — creation time in epoch milliseconds, or null (cached metadata)
 - `modifiedAt(): Instant?` — last modification time as Lyng `Instant`, or null (cached metadata)
 - `modifiedAtMillis(): Int?` — last modification time in epoch milliseconds, or null (cached metadata)
 - `list(): List<Path>` — children of a directory
 - `readBytes(): Buffer`
 - `writeBytes(bytes: Buffer)`
 - `appendBytes(bytes: Buffer)`
 - `readUtf8(): String`
 - `writeUtf8(text: String)`
 - `appendUtf8(text: String)`
 - `metadata(): Map` — keys: `isFile`, `isDirectory`, `size`, `createdAtMillis`, `modifiedAtMillis`, `isSymlink`
 - `mkdirs(mustCreate: Bool = false)`
 - `move(to: Path|String, overwrite: Bool = false)`
 - `delete(mustExist: Bool = false, recursively: Bool = false)`
 - `copy(to: Path|String, overwrite: Bool = false)`
 - `glob(pattern: String): List<Path>` — supports `**`, `*`, `?` (POSIX-style)
 Streaming readers for big files:
 - `readChunks(size: Int = 65536): Iterator<Buffer>` — iterate fixed-size byte chunks
 - `readUtf8Chunks(size: Int = 65536): Iterator<String>` — iterate text chunks by character count
 - `lines(): Iterator<String>` — line iterator built on `readUtf8Chunks`
 Notes:
 - Iterators implement Lyng iterator protocol. If you break early from a loop, the runtime will attempt to call `cancelIteration()` when available.
 - Current implementations chunk in memory. The public API is stable; internals will evolve to true streaming on all platforms.
 - Attribute accessors (`isFile`, `isDirectory`, `size`, `createdAt*`, `modifiedAt*`) cache a metadata snapshot inside the `Path` instance to avoid repeated filesystem calls during a sequence of queries. `metadata()` remains available for bulk access.
 ---
 #### Access policy (security)
 Access control is enforced by `FsAccessPolicy`. You pass a policy at installation time. The module wraps the filesystem with a secured decorator that consults the policy for each primitive operation.
 Main types:
 - `FsAccessPolicy` — your policy implementation
 - `PermitAllAccessPolicy` — allows all operations (default for testing)
 - `AccessOp` (sealed) — operations the policy can decide on:
  - `ListDir(path)`
  - `CreateFile(path)`
  - `OpenRead(path)`
  - `OpenWrite(path)`
  - `OpenAppend(path)`
  - `Delete(path)`
  - `Rename(from, to)`
  - `UpdateAttributes(path)` — defaults to write-level semantics
 Minimal denying policy example (imports omitted for brevity):
 ```kotlin
 val denyWrites = object : FsAccessPolicy {
    override suspend fun check(op: AccessOp, ctx: AccessContext): AccessDecision = when (op) {
        is AccessOp.OpenRead, is AccessOp.ListDir -> AccessDecision(Decision.Allow)
        else -> AccessDecision(Decision.Deny, reason = "read-only policy")
    }
 }
 createFs(denyWrites, scope)
 scope.eval("import lyng.io.fs")
 ```
 Composite operations like `copy` and `move` are checked as a set of primitives (e.g., `OpenRead(src)` + `Delete(dst)` if overwriting + `CreateFile(dst)` + `OpenWrite(dst)`).
 ---
 #### Errors and exceptions
 Policy denials are surfaced as Lyng runtime errors, not raw Kotlin exceptions:
 - Internally, a denial throws `AccessDeniedException`. The module maps it to `ObjIllegalOperationException` wrapped into an `ExecutionError` visible to scripts.
 Examples (Lyng):
 ```lyng
 import lyng.io.fs
 val p = Path("/protected/file.txt")
 try {
    p.writeUtf8("x")
    fail("expected error")
 } catch (e) {
    // e is an ExecutionError; message contains the policy reason
 }
 ```
 Other I/O failures (e.g., not found, not a directory) are also raised as Lyng errors (`ObjIllegalStateException`, `ObjIllegalArgumentException`, etc.) depending on context.
 ---
 #### Platform notes
 - JVM/Android/Native: synchronous Okio calls are executed on `Dispatchers.IO` (JVM/Android) or `Dispatchers.Default` (Native) to avoid blocking the main thread.
 - NodeJS: currently uses Okio’s Node backend. For heavy I/O, a native `fs/promises` backend is planned to fully avoid event-loop blocking.
 - Browser/Wasm: uses an in-memory filesystem for now. Persistent backends (IndexedDB or File System Access API) are planned.
 ---
 #### Roadmap
 - Native NodeJS backend using `fs/promises`
 - Browser persistent storage (IndexedDB)
 - Streaming readers/writers over real OS streams
 - Attribute setters and richer metadata
 If you have specific needs (e.g., sandboxing, virtual roots), implement a custom `FsAccessPolicy` or ask us to add a helper.
@@ -0,0 +1,141 @@
 ### Lyng CLI (`lyng`)
 The Lyng CLI is the reference command-line tool for the Lyng language. It lets you:
 - Run Lyng scripts from files or inline strings (shebangs accepted)
 - Use standard argument passing (`ARGV`) to your scripts.
 - Format Lyng source files via the built-in `fmt` subcommand.
 #### Building on Linux
 Requirements:
 - JDK 17+ (for Gradle and the JVM distribution)
 - GNU zip utilities (for packaging the native executable)
 - upx tool (executable in-place compression)
 The repository provides convenience scripts in `bin/` for local builds and installation into `~/bin`.
 Note: In this repository the scripts are named `bin/local_release` and `bin/local_jrelease`. In some environments these may be aliased as `bin/release` and `bin/jrelease`. The steps below use the actual file names present here.
 ##### Option A: Native linuxX64 executable (`lyng`)
 1) Build the native binary:
 ```
 ./gradlew :lyng:linkReleaseExecutableLinuxX64
 ```
 2) Install and package locally:
 ```
 bin/local_release
 ```
 What this does:
 - Copies the built executable to `~/bin/lyng` for easy use in your shell.
 - Produces `distributables/lyng-linuxX64.zip` containing the `lyng` executable.
 ##### Option B: JVM distribution (`jlyng` launcher)
 This creates a JVM distribution with a launcher script and links it to `~/bin/jlyng`.
 ```
 bin/local_jrelease
 ```
 What this does:
 - Runs `./gradlew :lyng:installJvmDist` to build the JVM app distribution to `lyng/build/install/lyng-jvm`.
 - Copies the distribution under `~/bin/jlyng-jvm`.
 - Creates a symlink `~/bin/jlyng` pointing to the launcher script.
 #### Usage
 Once installed, ensure `~/bin` is on your `PATH`. You can then use either the native `lyng` or the JVM `jlyng` launcher (both have the same CLI surface).
 ##### Running scripts
 - Run a script by file name and pass arguments to `ARGV`:
 ```
 lyng path/to/script.lyng arg1 arg2
 ```
 - Run a script whose name starts with `-` using `--` to stop option parsing:
 ```
 lyng -- -my-script.lyng arg1 arg2
 ```
 - Execute inline code with `-x/--execute` and pass positional args to `ARGV`:
 ```
 lyng -x "println(\"Hello\")" more args
 ```
 - Print version/help:
 ```
 lyng --version
 lyng --help
 ```
 ### Use in shell scripts
 Standard unix shebangs (`#!`) are supported, so you can make Lyng scripts directly executable on Unix-like systems. For example:
    #!/usr/bin/env lyng
    println("Hello, world!")
 ##### Formatting source: `fmt` subcommand
 Format Lyng files with the built-in formatter.
 Basic usage:
 ```
 lyng fmt [OPTIONS] FILE...
 ```
 Options:
 - `--check` — Check-only mode. Prints file paths that would change and exits with code 2 if any changes are needed, 0 otherwise.
 - `-i, --in-place` — Write formatted content back to the source files (off by default).
 - `--spacing` — Apply spacing normalization.
 - `--wrap`, `--wrapping` — Enable line wrapping.
 Semantics and exit codes:
 - Default behavior is to write formatted content to stdout. When multiple files are provided, the output is separated with `--- <path> ---` headers.
 - `--check` and `--in-place` are mutually exclusive; using both results in an error and exit code 1.
 - `--check` exits with 2 if any file would change, with 0 otherwise.
 - Other errors (e.g., I/O issues) result in a non-zero exit code.
 Examples:
 ```
 # Print formatted content to stdout
 lyng fmt src/file.lyng
 # Format multiple files to stdout with headers
 lyng fmt src/a.lyng src/b.lyng
 # Check mode: list files that would change; exit 2 if changes are needed
 lyng fmt --check src/**/*.lyng
 # In-place formatting
 lyng fmt -i src/**/*.lyng
 # Enable spacing normalization and wrapping
 lyng fmt --spacing --wrap src/file.lyng
 ```
 #### Notes
 - Both native and JVM distributions expose the same CLI interface. Use whichever best fits your environment.
 - When executing scripts, all positional arguments after the script name are available in Lyng as `ARGV`.
 - The interpreter recognizes shebang lines (`#!`) at the beginning of a script file and ignores them at runtime, so you can make Lyng scripts directly executable on Unix-like systems.
@@ -9,17 +9,37 @@ Same as in C++.
 | **Highest**<br>0 | power, not, calls, indexing, dot,... |
 |        1         | `%` `*` `/`                          |
 |        2         | `+` `-`                              |
-|        3         | bit shifts (NI)                      |
+|        3         | bit shifts `<<` `>>`                 |
 |        4         | `<=>` (1)                            |
 |        5         | `<=` `>=` `<` `>`                    |
 |        6         | `==` `!=`                            |
-|        7         | bitwise and `&` (NI)                 |
+|        7         | bitwise and `&`                      |
-|        9         | bitwise or `\|` (NI)                 |
+|        8         | bitwise xor `^`                      |
 |        9         | bitwise or `\|`                      |
 |        10        | `&&`                                 |
 |  11<br/>lowest   | `\|\|`                               |
-(NI)
+Bitwise operators
-: not yet implemented.
+: available only for `Int` values. For mixed `Int`/`Real` numeric expressions, bitwise operators are not defined.
 Bitwise NOT `~x`
 : unary operator that inverts all bits of a 64‑bit signed integer (`Int`). It follows two's‑complement rules, so
  `~x` is numerically equal to `-(x + 1)`. Examples: `~0 == -1`, `~1 == -2`, `~(-1) == 0`.
 Examples:
 ```
 5 & 3    // -> 1
 5 | 3    // -> 7
 5 ^ 3    // -> 6
 ~0       // -> -1
 1 << 3   // -> 8
 8 >> 3   // -> 1
 ```
 Notes:
 - Shifts operate on 64-bit signed integers (`Int` is 64-bit). Right shift `>>` is arithmetic (sign-propagating).
 - Shift count is masked to the range 0..63, similar to the JVM/Kotlin behavior (e.g., `1 << 65` equals `1 << 1`).
 (1)
 : Shuttle operator: `a <=> b` returns 0 if a == b, negative Int if a < b and positive Int otherwise. It is necessary to
@@ -0,0 +1,25 @@
 # Migration of Instant and Clock
 ## History
 Before kotlin 2.0, there was an excellent library, kotlinx.datetime, which was widely used everywhere, also in Lyng and its dependencies.
 When kotlin 2.0 was released, or soon after, JetBrains made an exptic decision to remove `Instant` and `Clock` from kotlinx.datetime and replace it with _yet experimental_ analogs in `kotlin.time`.
 The problem is, these were not quite the same (these weren't `@Serializable`!), so people didn't migrate with ease. Okay, then JetBrains decided to not only deprecate it but also make them unusable on Apple targets. It sort of split auditories of many published libraries to those who hate JetBrains and Apple and continue to use 1.9-2.0 compatible versions that no longer work with Kotlin 2.2 on Apple targets (but work pretty well with earlier Kotlin or on other platforms). 
 Later JetBrains added serializers for their new `Instant` and `Clock` types, but strangely not in the stdlib, but in newer versions of `kotlinx.serialization`. This means that plain upgrade of dependencies to 2.2 is not enough to make them work.
 ## Solution
 We hereby publish a new version of Lyng, 1.0.8-SNAPSHOT, which uses `ktlin.time.Instant` and `kotlin.time.Clock` instead of `kotlinx.datetime.Instant` and `kotlinx.datetime.Clock; it is in other aspects compatible also with Lynon encoded binaries. Still you might need to migrate your code to use `kotlinx.datetime` types.
 So, if you are getting errors with new version, plase do:
 - upgrade to Kotlin 2.2
 - upgrade to Lyng 1.0.8-SNAPSHOT
 - replace in your code imports (or other uses) of`kotlinx.datetime.Clock` to `kotlin.time.Clock` and `kotlinx.datetime.Instant` to `kotlin.time.Instant`.
 This should solve the problem and hopefully we'll see no more suh a brillant ideas from IDEA ideologspersons.
 Sorry for inconvenicence and send a ray of hate to JetBrains ;)
@@ -1,4 +1,6 @@
-# Parallelism in Lyng
+# Multithreading/parallel execution
 [//]: # (topMenu)
 Lyng is built to me multithreaded where possible (e.g. all targets byt JS and wasmJS as for now)
 and cooperatively parallel (coroutine based) everywhere.
@@ -36,19 +38,19 @@ Launch has the only argument which should be a callable (lambda usually) that is
 ## Synchronization: Mutex
-Suppose we have a resource, that could be used concurrently, a coutner in our case. If we won'r protect it, concurrent usage cause RC, Race Condition, providing wrong result:
+Suppose we have a resource, that could be used concurrently, a counter in our case. If we won't protect it, concurrent usage cause RC, Race Condition, providing wrong result:
    var counter = 0
-    (1..4).map { 
+    (1..50).map { 
        launch {
            // slow increment:
            val c = counter
-            delay(10)
+            delay(100)
            counter = c + 1
        }
    }.forEach { it.await() }
-    assert(counter < 4)
+    assert(counter < 50) { "counter is "+counter }
    >>> void
 The obviously wrong result is not 4, as all coroutines capture the counter value, which is 1, then sleep for 5ms, then save 1 + 1 as result. May some coroutines will pass, so it will be 1 or 2, most likely.
@@ -205,3 +207,36 @@ Flows allow easy transforming of any [Iterable]. See how the standard Lyng libra
 [Iterable]: Iterable.md
 ## Scope frame pooling (JVM)
 Lyng includes an optional optimization for function/method calls on JVM: scope frame pooling, toggled by the runtime flag `PerfFlags.SCOPE_POOL`.
 - Default: `SCOPE_POOL` is OFF on JVM.
 - Rationale: the current `ScopePool` implementation is not thread‑safe. Lyng targets multi‑threaded execution on most platforms, therefore we keep pooling disabled by default until a thread‑safe design is introduced.
 - When safe to enable: single‑threaded runs (e.g., micro‑benchmarks or scripts executed on a single worker) where no scopes are shared across threads.
 - How to toggle at runtime (Kotlin/JVM tests):
  - `PerfFlags.SCOPE_POOL = true` to enable.
  - `PerfFlags.SCOPE_POOL = false` to disable.
 - Expected effect (from our JVM micro‑benchmarks): in deep call loops, enabling pooling reduced total time by about 1.38× in a dedicated pooling benchmark; mileage may vary depending on workload.
 Future work: introduce thread‑safe pooling (e.g., per‑thread pools or confinement strategies) before considering enabling it by default in multi‑threaded environments.
 ### Closures inside coroutine helpers (launch/flow)
 Closures executed by `launch { ... }` and `flow { ... }` resolve names using the `ClosureScope` rules:
 1. Closure frame locals/arguments
 2. Captured receiver instance/class members
 3. Closure ancestry locals + each frame’s `this` members (cycle‑safe)
 4. Caller `this` members
 5. Caller ancestry locals + each frame’s `this` members (cycle‑safe)
 6. Module pseudo‑symbols (e.g., `__PACKAGE__`)
 7. Direct module/global fallback (nearest `ModuleScope` and its parent/root)
 Implications:
 - Outer locals (e.g., `counter`) stay visible across suspension points.
 - Global helpers like `delay(ms)` and `yield()` are available from inside closures.
 - If you write your own async helpers, execute user lambdas under `ClosureScope(callScope, capturedCreatorScope)` and avoid manual ancestry walking.
 See also: [Scopes and Closures: resolution and safety](scopes_and_closures.md)
@@ -0,0 +1,622 @@
 This document explains how to enable and measure the performance optimizations added to the Lyng interpreter. The focus is JVM‑first with safe, flag‑guarded rollouts and quick A/B testing. Other targets (JS/Wasm/Native) keep conservative defaults until validated.
 [//]: # (excludeFromIndex)
 ## Overview
 Optimizations are controlled by runtime‑mutable flags in `net.sergeych.lyng.PerfFlags`, initialized from platform‑specific static defaults `net.sergeych.lyng.PerfDefaults` (KMP `expect/actual`).
 - JVM/Android defaults are aggressive (e.g. `RVAL_FASTPATH=true`).
 - Non‑JVM defaults are conservative (e.g. `RVAL_FASTPATH=false`).
 All flags are `var` and can be flipped at runtime (e.g., from tests or host apps) for A/B comparisons.
 ### Workload presets (JVM‑first)
 To simplify switching between recommended flag sets for different workloads, use `net.sergeych.lyng.PerfProfiles`:
 ```
 val snap = PerfProfiles.apply(PerfProfiles.Preset.BENCH)  // or BASELINE / BOOKS
 // ... run workload ...
 PerfProfiles.restore(snap)  // restore previous flags
 ```
 - BASELINE: restores platform defaults from `PerfDefaults` (good rollback point).
 - BENCH: expression‑heavy micro‑bench focus (aggressive R‑value and PIC optimizations on JVM).
 - BOOKS: documentation workloads (prefers simpler paths; disables some PIC/arg builder features shown neutral/negative for this load in A/B).
 ## Key flags
 - `LOCAL_SLOT_PIC` — Runtime cache in `LocalVarRef` to avoid repeated name→slot lookups per frame (ON JVM default).
 - `EMIT_FAST_LOCAL_REFS` — Compiler emits `FastLocalVarRef` for identifiers known to be locals/params (ON JVM default).
 - `ARG_BUILDER` — Efficient argument building: small‑arity no‑alloc and pooled builder on JVM (ON JVM default).
 - `ARG_SMALL_ARITY_12` — Extends small‑arity no‑alloc call paths from 0–8 to 0–12 arguments (JVM‑first exploration; OFF by default). Use for codebases with many 9–12 arg calls; A/B before enabling.
 - `SKIP_ARGS_ON_NULL_RECEIVER` — Early return on optional‑null receivers before building args (semantics‑compatible). A/B only.
 - `SCOPE_POOL` — Scope frame pooling for calls (JVM, per‑thread ThreadLocal pool). ON by default on JVM; togglable at runtime.
 - `FIELD_PIC` — 2‑entry polymorphic inline cache for field reads/writes keyed by `(classId, layoutVersion)` (ON JVM default).
 - `METHOD_PIC` — 2‑entry PIC for instance method calls keyed by `(classId, layoutVersion)` (ON JVM default).
 - `FIELD_PIC_SIZE_4` — Increases Field PIC size from 2 to 4 entries (JVM-first tuning; OFF by default). Use for sites with >2 receiver shapes.
 - `METHOD_PIC_SIZE_4` — Increases Method PIC size from 2 to 4 entries (JVM-first tuning; OFF by default).
 - `PIC_ADAPTIVE_2_TO_4` — Adaptive growth of Field/Method PICs from 2→4 entries per-site when miss rate >20% over ≥256 accesses (JVM-first; OFF by default).
 - `INDEX_PIC` — Enables polymorphic inline cache for indexing (e.g., `a[i]`) and related fast paths. Defaults to follow `FIELD_PIC` on init; can be toggled independently.
 - `INDEX_PIC_SIZE_4` — Increases Index PIC size from 2 to 4 entries (JVM-first tuning). Default: ON for JVM; OFF elsewhere by default.
 - `PIC_DEBUG_COUNTERS` — Enable lightweight hit/miss counters via `PerfStats` (OFF by default).
 - `PRIMITIVE_FASTOPS` — Fast paths for `(ObjInt, ObjInt)` arithmetic/comparisons and `(ObjBool, ObjBool)` logic (ON JVM default).
 - `RVAL_FASTPATH` — Bypass `ObjRecord` in pure expression evaluation via `ObjRef.evalValue` (ON JVM default, OFF elsewhere).
 See `src/commonMain/kotlin/net/sergeych/lyng/PerfFlags.kt` and `PerfDefaults.*.kt` for details and platform defaults.
 ## Where optimizations apply
 - Locals: `FastLocalVarRef`, `LocalVarRef` per‑frame cache (PIC).
 - Calls: small‑arity zero‑alloc paths (0–8 args; optionally 0–12 with `ARG_SMALL_ARITY_12`), pooled builder (JVM), and child frame pooling (optional).
 - Properties/methods: Field/Method PICs with receiver shape `(classId, layoutVersion)` and handle‑aware caches; configurable 2→4 entries under flags.
 - Expressions: R‑value fast paths in hot nodes (`UnaryOpRef`, `BinaryOpRef`, `ElvisRef`, logical ops, `RangeRef`, `IndexRef` read, `FieldRef` receiver eval, `ListLiteralRef` elements, `CallRef` callee, `MethodCallRef` receiver, assignment RHS).
 - Primitives: Direct boolean/int ops where safe.
 ### Compiler constant folding (conservative)
 - The compiler folds a safe subset of literal‑only expressions at compile time to reduce runtime work:
  - Integer arithmetic: `+ - * / %` (division/modulo only when divisor ≠ 0).
  - Bitwise integer ops: `& ^ | << >>`.
  - Comparisons and equality for ints/strings/chars: `== != < <= > >=`.
  - Boolean logic for literal booleans: `|| &&` and unary `!`.
  - String concatenation of literal strings: `"a" + "b"`.
 - Non‑literal operands or side‑effecting constructs are not folded.
 - Semantics remain unchanged; tests verify parity.
 ## Running JVM micro‑benchmarks
 Each benchmark prints timings with `[DEBUG_LOG]` and includes correctness assertions to prevent dead‑code elimination.
 Run individual tests to avoid multiplatform matrices:
 ```
 ./gradlew :lynglib:jvmTest --tests LocalVarBenchmarkTest
 ./gradlew :lynglib:jvmTest --tests CallBenchmarkTest
 ./gradlew :lynglib:jvmTest --tests CallMixedArityBenchmarkTest
 ./gradlew :lynglib:jvmTest --tests CallSplatBenchmarkTest
 ./gradlew :lynglib:jvmTest --tests PicBenchmarkTest
 ./gradlew :lynglib:jvmTest --tests PicInvalidationJvmTest
 ./gradlew :lynglib:jvmTest --tests PicAdaptiveABTest
 ./gradlew :lynglib:jvmTest --tests ArithmeticBenchmarkTest
 ./gradlew :lynglib:jvmTest --tests ExpressionBenchmarkTest
 ./gradlew :lynglib:jvmTest --tests IndexPicABTest
 ./gradlew :lynglib:jvmTest --tests IndexWritePathABTest
 ./gradlew :lynglib:jvmTest --tests CallPoolingBenchmarkTest
 ./gradlew :lynglib:jvmTest --tests MethodPoolingBenchmarkTest
 ./gradlew :lynglib:jvmTest --tests MixedBenchmarkTest
 ./gradlew :lynglib:jvmTest --tests DeepPoolingStressJvmTest
 ```
 Typical output (example):
 ```
 [DEBUG_LOG] [BENCH] mixed-arity x200000 [ARG_BUILDER=ON]: 85.7 ms
 ```
 Lower time is better. Run the same bench with a flag OFF vs ON to compare.
 ### Optional JFR allocation profiling (JVM)
 When running end‑to‑end “book” workloads or heavier benches, you can enable JFR to capture allocation and GC details:
 ```
 ./gradlew :lynglib:jvmTest --tests BookAllocationProfileTest -Dlyng.jfr=true \
  -Dlyng.profile.warmup=1 -Dlyng.profile.repeats=3 -Dlyng.profile.shuffle=true
 ```
 - Dumps are saved to `lynglib/build/jfr_*.jfr` if the JVM supports Flight Recorder.
 - The test also records GC counts/time and median time/heap deltas to `lynglib/build/book_alloc_profile.txt`.
 ## Toggling flags in tests
 Flags are mutable at runtime, e.g.:
 ```kotlin
 PerfFlags.ARG_BUILDER = false
 val r1 = (Scope().eval(script) as ObjInt).value
 PerfFlags.ARG_BUILDER = true
 val r2 = (Scope().eval(script) as ObjInt).value
 ```
 Reset flags at the end of a test to avoid impacting other tests.
 ## PIC diagnostics (optional)
 Enable counters:
 ```kotlin
 PerfFlags.PIC_DEBUG_COUNTERS = true
 PerfStats.resetAll()
 ```
 Available counters in `PerfStats`:
 - Field PIC: `fieldPicHit`, `fieldPicMiss`, `fieldPicSetHit`, `fieldPicSetMiss`
 - Method PIC: `methodPicHit`, `methodPicMiss`
 - Index PIC: `indexPicHit`, `indexPicMiss`
 - Locals: `localVarPicHit`, `localVarPicMiss`, `fastLocalHit`, `fastLocalMiss`
 - Primitive ops: `primitiveFastOpsHit`
 Print a summary at the end of a bench/test as needed. Remember to turn counters OFF after the test.
 ## A/B scenarios and guidance (JVM)
 ### Adaptive PIC (fields/methods)
 - Flags: `FIELD_PIC=true`, `METHOD_PIC=true`, `FIELD_PIC_SIZE_4=false`, `METHOD_PIC_SIZE_4=false`, toggle `PIC_ADAPTIVE_2_TO_4` OFF vs ON.
 - Benchmarks: `PicBenchmarkTest`, `MixedBenchmarkTest`, `PicAdaptiveABTest`.
 - Expect wins at sites with >2 receiver shapes; counters should show fewer misses with adaptivity ON.
 ### Index PIC and size
 - Flags: toggle `INDEX_PIC` OFF vs ON; then `INDEX_PIC_SIZE_4` OFF vs ON.
 - Benchmarks: `ExpressionBenchmarkTest` (list indexing) and `IndexPicABTest` (string/map indexing).
 - Expect wins when the same index shape recurs; counters should show higher `indexPicHit`.
 ### Index WRITE paths (Map and List)
 - Flags: toggle `INDEX_PIC` OFF vs ON; then `INDEX_PIC_SIZE_4` OFF vs ON.
 - Benchmark: `IndexWritePathABTest` (Map[String] put, List[Int] set) — writes results to `lynglib/build/index_write_ab_results.txt`.
 - Direct fast‑paths are used on R‑value paths where safe and semantics‑preserving (e.g., optional‑chaining no‑ops on null receivers; bounds exceptions unchanged).
 ## Guidance per flag (JVM)
 - Keep `RVAL_FASTPATH = true` unless debugging a suspected expression‑semantics issue.
 - Use `SCOPE_POOL = true` only for benchmarks or once pooling passes the deep stress tests and broader validation; currently OFF by default.
 - `FIELD_PIC` and `METHOD_PIC` should remain ON; they are validated with invalidation tests.
 - Consider enabling `FIELD_PIC_SIZE_4`/`METHOD_PIC_SIZE_4` for sites with 3–4 receiver shapes; measure first.
 - `PIC_ADAPTIVE_2_TO_4` is useful on polymorphic sites and may outperform fixed size 2 on mixed-shape workloads. Validate with `PicAdaptiveABTest`.
 - `INDEX_PIC` is generally beneficial on JVM; leave ON when measuring index‑heavy workloads.
 - `INDEX_PIC_SIZE_4` is ON by default on JVM as A/B showed consistent wins on String[Int] and Map[String] workloads. You can disable it by setting `PerfFlags.INDEX_PIC_SIZE_4 = false` if needed.
 - `ARG_BUILDER` should remain ON; switch OFF only to get a baseline.
 - `ARG_SMALL_ARITY_12` is experimental and OFF by default. Enable it only if your workload frequently calls functions with 9–12 arguments and A/B shows consistent wins.
 ### Workload‑specific recommendations (JVM)
 - “Books”/documentation loads (BookTest): prefer simpler paths; in A/B these often benefit from the BOOKS preset (e.g., `ARG_BUILDER=false`, `SCOPE_POOL=false`, `INDEX_PIC=false`). Use `PerfProfiles.apply(PerfProfiles.Preset.BOOKS)` before the run and `restore(...)` after.
 - Expression‑heavy benches: use the BENCH preset (PICs and R‑value fast‑paths enabled, `INDEX_PIC_SIZE_4=true`).
 - Always verify with local A/B on your environment; rollback is a flag flip or applying BASELINE.
 ## Notes on correctness & safety
 - Optional chaining semantics are preserved across fast paths.
 - Visibility/mutability checks are enforced even on PIC fast‑paths.
 - `frameId` is regenerated on each pooled frame borrow; stress tests verify no leakage under deep nesting/recursion.
 ## Cross‑platform
 - Non‑JVM defaults keep `RVAL_FASTPATH=false` for now; other low‑risk flags may be ON.
 - Once JVM path is fully validated and measured, add lightweight benches for JS/Wasm/Native and enable flags incrementally.
 ## Range fast iteration (experimental)
 - Flag: `RANGE_FAST_ITER` (default OFF).
 - When enabled and applicable, simple ascending integer ranges (`0..n`, `0..<n`) use a specialized non‑allocating iterator (`ObjFastIntRangeIterator`).
 - Benchmark: `RangeIterationBenchmarkTest` records OFF/ON timings for inclusive, exclusive, reversed, negative, and empty ranges. Semantics are preserved; non‑int or complex ranges fall back to the generic iterator.
 ## Troubleshooting
 - If a benchmark shows regressions, flip related flags OFF to isolate the source (e.g., `ARG_BUILDER`, `RVAL_FASTPATH`, `FIELD_PIC`, `METHOD_PIC`).
 - Use `PIC_DEBUG_COUNTERS` to observe inline cache effectiveness.
 - Ensure tests do not accidentally keep flags ON for subsequent tests; reset after each test.
 ## JVM micro-benchmark results (3× medians; OFF → ON)
 Date: 2025-11-10 23:04 (local)
 | Flag               | Benchmark/Test                              | OFF median (ms) | ON median (ms) | Speedup | Notes |
 |--------------------|----------------------------------------------|-----------------:|----------------:|:-------:|-------|
 | ARG_BUILDER        | CallMixedArityBenchmarkTest                   |           788.02 |          668.79 |  1.18×  | Clear win on mixed arity |
 | ARG_BUILDER        | CallBenchmarkTest (simple calls)              |           423.87 |          425.47 |  1.00×  | Neutral on repeated simple calls |
 | FIELD_PIC          | PicBenchmarkTest::benchmarkFieldGetSetPic     |           113.575 |          106.017 |  1.07×  | Small but consistent win |
 | METHOD_PIC         | PicBenchmarkTest::benchmarkMethodPic          |           251.068 |          149.439 |  1.68×  | Large consistent win |
 | RVAL_FASTPATH      | ExpressionBenchmarkTest                       |           514.491 |          426.800 |  1.21×  | Consistent win in expression chains |
 | PRIMITIVE_FASTOPS  | ArithmeticBenchmarkTest (int-sum)             |           243.420 |          128.146 |  1.90×  | Big win for integer addition |
 | PRIMITIVE_FASTOPS  | ArithmeticBenchmarkTest (int-cmp)             |           210.385 |          168.534 |  1.25×  | Moderate win for comparisons |
 | SCOPE_POOL         | CallPoolingBenchmarkTest                      |           505.778 |          366.737 |  1.38×  | Single-threaded bench; per-thread ThreadLocal pool; default ON on JVM |
 Notes:
 - All results obtained from `[DEBUG_LOG] [BENCH]` outputs with three repeated Gradle test invocations per configuration; medians reported.
 - JVM defaults (current): `ARG_BUILDER=true`, `PRIMITIVE_FASTOPS=true`, `RVAL_FASTPATH=true`, `FIELD_PIC=true`, `METHOD_PIC=true`, `SCOPE_POOL=true` (per‑thread ThreadLocal pool), `REGEX_CACHE=true`.
 ## Concurrency (multi‑core) pooling results (3× medians; OFF → ON)
 Date: 2025-11-10 22:56 (local)
 | Flag       | Benchmark/Test                      | OFF median (ms) | ON median (ms) | Speedup | Notes |
 |------------|--------------------------------------|-----------------:|----------------:|:-------:|-------|
 | SCOPE_POOL | ConcurrencyCallBenchmarkTest (JVM)   |           521.102 |          201.374 |  2.59×  | Multithreaded workload on `Dispatchers.Default` with per‑thread ThreadLocal pool; workers=8, iters=15000/worker. |
 Methodology:
 - The test toggles `PerfFlags.SCOPE_POOL` within a single run and executes the same script across N worker coroutines scheduled on `Dispatchers.Default`.
 - We executed the test three times via Gradle and computed medians from the printed `[DEBUG_LOG]` timings:
  - OFF runs (ms): 532.442 | 521.102 | 474.386 → median 521.102
  - ON runs (ms):  218.683 | 201.374 | 198.737 → median 201.374
 - Speedup = OFF/ON.
 Reproduce:
 ```
 ./gradlew :lynglib:jvmTest --tests "ConcurrencyCallBenchmarkTest" --rerun-tasks
 ```
 ## Next optimization steps (JVM)
 Date: 2025-11-10 23:04 (local)
 - PICs
  - Widen METHOD_PIC to 3–4 entries with tiny LRU; keep invalidation on layout change; re-run `PicInvalidationJvmTest`.
  - Micro fast-path for FIELD_PIC read-then-write pairs (`x = x + 1`) to reuse the resolved slot within one step.
 - Locals and slots
  - Pre-size `Scope` slot structures when compiler knows local/param counts; audit `EMIT_FAST_LOCAL_REFS` coverage.
  - Re-run `LocalVarBenchmarkTest` to quantify gains.
 - RVAL_FASTPATH coverage
  - Cover primitive `ObjList` index reads, pure receivers in `FieldRef`, and assignment RHS where safe; add micro-benches to `ExpressionBenchmarkTest`.
 - Collections and ranges
  - Specialize `(Int..Int)` loops into tight counted loops (no intermediary objects).
  - Add primitive-specialized `ObjList` ops (`map`, `filter`, `sum`, `contains`) under `PRIMITIVE_FASTOPS`.
 - Regex and strings
  - Cache compiled regex for string literals at compile time; add a tiny LRU for dynamic patterns behind `REGEX_CACHE`.
  - Add `RegexBenchmarkTest` for repeated matches.
 - JIT friendliness (Kotlin/JVM)
  - Inline tiny helpers in hot paths, prefer arrays for internal buffers, finalize hot data structures where safe.
 Validation matrix
 - Always re-run: `CallBenchmarkTest`, `CallMixedArityBenchmarkTest`, `PicBenchmarkTest`, `ExpressionBenchmarkTest`, `ArithmeticBenchmarkTest`, `CallPoolingBenchmarkTest`, `DeepPoolingStressJvmTest`, `ConcurrencyCallBenchmarkTest` (3× medians when comparing).
 - Keep full `:lynglib:jvmTest` green after each change.
 ## PIC update (4‑way METHOD_PIC) — JVM (3× medians; OFF → ON)
 Date: 2025-11-11 00:16 (local)
 | Flag      | Benchmark/Test                               | OFF median (ms) | ON median (ms) | Speedup | Notes |
 |-----------|-----------------------------------------------|-----------------:|----------------:|:-------:|-------|
 | FIELD_PIC | PicBenchmarkTest::benchmarkFieldGetSetPic      |          207.578 |         106.481 |  1.95×  | Read→write loop; micro fast‑path groundwork present |
 | METHOD_PIC| PicBenchmarkTest::benchmarkMethodPic           |          273.478 |         182.226 |  1.50×  | 4‑way PIC with move‑to‑front (was 2‑way before) |
 Medians computed from three Gradle runs in this session; see `[DEBUG_LOG] [BENCH]` lines in test output.
 ## Locals/slots capacity (pre‑sizing hints) — JVM (3× medians; OFF → ON)
 Date: 2025-11-11 13:19 (local)
 | Optimization            | Benchmark/Test              | OFF config                         | ON config                          | OFF median (ms) | ON median (ms) | Speedup | Notes |
 |-------------------------|-----------------------------|------------------------------------|------------------------------------|-----------------:|----------------:|:-------:|-------|
 | Locals pre‑sizing + PIC | LocalVarBenchmarkTest       | LOCAL_SLOT_PIC=OFF, FAST_LOCAL=OFF | LOCAL_SLOT_PIC=ON, FAST_LOCAL=ON   |          472.129 |         370.871 |  1.27×  | Compiler hint `params+4`; slot pre‑size; semantics unchanged |
 Methodology:
 - Each configuration executed three times via `:lynglib:jvmTest --tests "…" --rerun-tasks`; medians reported.
 - Locals improvement stacks with per‑thread `SCOPE_POOL` and ARG fast paths.
 ## RVAL fast paths update — JVM (IndexRef and FieldRef) [3× medians; OFF → ON]
 Date: 2025-11-11 13:19 (local)
 New micro-benchmarks have been added to quantify the latest `RVAL_FASTPATH` extensions:
 - Primitive `ObjList` index-read fast path in `IndexRef`.
 - Conservative “pure receiver” evaluation in `FieldRef` (monomorphic, immutable receiver), preserving visibility/mutability checks and optional chaining semantics.
 Benchmarks to run (each 3× OFF → ON):
 - `ExpressionBenchmarkTest::benchmarkListIndexReads`
 - `ExpressionBenchmarkTest::benchmarkFieldReadPureReceiver`
 Reproduce (3× each; collect `[DEBUG_LOG] [BENCH]` lines and compute medians):
 ```
 ./gradlew :lynglib:jvmTest --tests "ExpressionBenchmarkTest.benchmarkListIndexReads" --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests "ExpressionBenchmarkTest.benchmarkListIndexReads" --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests "ExpressionBenchmarkTest.benchmarkListIndexReads" --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests "ExpressionBenchmarkTest.benchmarkFieldReadPureReceiver" --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests "ExpressionBenchmarkTest.benchmarkFieldReadPureReceiver" --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests "ExpressionBenchmarkTest.benchmarkFieldReadPureReceiver" --rerun-tasks
 ```
 Once collected, add medians and speedups to the table below:
 | Flag          | Benchmark/Test                                  | OFF median (ms) | ON median (ms) | Speedup | Notes |
 |---------------|---------------------------------------------------|-----------------:|----------------:|:-------:|-------|
 | RVAL_FASTPATH | ExpressionBenchmarkTest::benchmarkListIndexReads  |           305.243 |          230.942 |  1.32×  | Fast path in `IndexRef` for `ObjList` + `ObjInt` index |
 | RVAL_FASTPATH | ExpressionBenchmarkTest::benchmarkFieldReadPureReceiver |           266.222 |          190.720 |  1.40×  | Pure-receiver evaluation in `FieldRef` (monomorphic, immutable) |
 Notes:
 - Both benches toggle `PerfFlags.RVAL_FASTPATH` within a single run to produce OFF and ON timings under identical conditions.
 - Correctness assertions ensure the loops are not optimized away.
 - All semantics (visibility/mutability checks, optional chaining) remain intact; fast paths only skip interim `ObjRecord` traffic when safe.
 ## ARG_BUILDER — splat fast‑path (3× medians; OFF → ON)
 Date: 2025-11-11 13:12 (local)
 Environment: Gradle 8.7; JVM (JDK as configured by toolchain); single‑threaded test execution; stdout enabled.
 | Flag        | Benchmark/Test                    | OFF median (ms) | ON median (ms) | Speedup | Notes |
 |-------------|-----------------------------------|-----------------:|----------------:|:-------:|-------|
 | ARG_BUILDER | CallSplatBenchmarkTest (splat)    |          613.689 |         463.593 |  1.32×  | Single‑splat fast‑path returns underlying list directly; avoids intermediate copies |
 Inputs (3×):
 - OFF runs (ms): 613.689 | 629.604 | 612.361 → median 613.689
 - ON runs (ms):  453.752 | 463.593 | 468.844 → median 463.593
 Reproduce (3×):
 ```
 ./gradlew :lynglib:jvmTest --tests "CallSplatBenchmarkTest" --rerun-tasks
 ```
 ## Phase A consolidation (JVM) — 3× medians updated
 Date: 2025-11-11 13:48 (local)
 Environment:
 - JDK: OpenJDK 20.0.2.1 (Amazon Corretto 20.0.2.1+10-FR)
 - Gradle: 8.7
 - OS/Arch: macOS 14.8.1 (aarch64)
 ### ARG_BUILDER
 | Benchmark/Test                   | OFF median (ms) | ON median (ms) | Speedup | Notes |
 |----------------------------------|-----------------:|----------------:|:-------:|-------|
 | CallMixedArityBenchmarkTest      |          866.681 |         717.439 |  1.21×  | Small-arity 0–8 fast path + builder; correctness preserved |
 | CallSplatBenchmarkTest (splat)   |          600.880 |         459.706 |  1.31×  | Single-splat fast path returns underlying list; avoids copies |
 Inputs (3×):
 - Mixed arity OFF: 874.088291 | 866.680959 | 858.577125 → median 866.680959
 - Mixed arity ON:  731.308625 | 706.440125 | 717.438542 → median 717.438542
 - Splat OFF: 600.268625 | 607.849416 | 600.879666 → median 600.879666
 - Splat ON:  459.706375 | 449.950166 | 461.815167 → median 459.706375
 ### RVAL_FASTPATH (new coverage)
 | Benchmark/Test                                   | OFF median (ms) | ON median (ms) | Speedup | Notes |
 |--------------------------------------------------|-----------------:|----------------:|:-------:|-------|
 | ExpressionBenchmarkTest::benchmarkListIndexReads |          299.366 |         218.812 |  1.37×  | IndexRef fast path for ObjList + ObjInt |
 | ExpressionBenchmarkTest::benchmarkFieldReadPureReceiver |          268.315 |         186.032 |  1.44×  | Pure-receiver evaluation in FieldRef (monomorphic, immutable) |
 Inputs (3×):
 - ListIndex OFF: 291.344 | 310.717167 | 299.365709 → median 299.365709
 - ListIndex ON:  217.795375 | 221.504166 | 218.812042 → median 218.812042
 - FieldRead OFF: 267.2775 | 274.355208 | 268.315125 → median 268.315125
 - FieldRead ON:  189.599333 | 186.031791 | 182.069167 → median 186.031791
 ### Locals/slots capacity (precise hints)
 | Benchmark/Test             | OFF config                         | ON config                          | OFF median (ms) | ON median (ms) | Speedup | Notes |
 |---------------------------|------------------------------------|------------------------------------|-----------------:|----------------:|:-------:|-------|
 | LocalVarBenchmarkTest     | LOCAL_SLOT_PIC=OFF, FAST_LOCAL=OFF | LOCAL_SLOT_PIC=ON, FAST_LOCAL=ON   |          446.018 |         347.964 |  1.28×  | Precise capacity hints + fast-locals coverage |
 Inputs (3×):
 - Locals OFF: 470.575041 | 441.89625 | 446.017833 → median 446.017833
 - Locals ON:  370.664208 | 345.615541 | 347.964291 → median 347.964291
 Methodology:
 - Each test executed three times via Gradle with stdout enabled; medians computed from `[DEBUG_LOG] [BENCH]` lines.
 - Full JVM tests and stress benches remain green in this cycle.
 ## Phase B — List ops specialization (PRIMITIVE_FASTOPS) — 3× medians (OFF → ON)
 Date: 2025-11-11 13:48 (local)
 Environment:
 - JDK: OpenJDK 20.0.2.1 (Amazon Corretto 20.0.2.1+10-FR)
 - Gradle: 8.7
 - OS/Arch: macOS 14.8.1 (aarch64)
 | Optimization        | Benchmark/Test                          | OFF median (ms) | ON median (ms) | Speedup | Notes |
 |---------------------|------------------------------------------|-----------------:|----------------:|:-------:|-------|
 | PRIMITIVE_FASTOPS   | ListOpsBenchmarkTest::benchmarkSumInts   |          324.805 |         144.908 |  2.24×  | ObjList.sum fast path for int lists; generic fallback preserved |
 | PRIMITIVE_FASTOPS   | ListOpsBenchmarkTest::benchmarkContainsInts |          440.414 |         415.476 |  1.06×  | ObjList.contains fast path when searching ObjInt in int list |
 Inputs (3×):
 - list-sum OFF: 332.863417 | 323.491625 | 324.804083 → median 324.804083
 - list-sum ON:  144.907833 | 148.870792 | 126.418542 → median 144.907833
 - list-contains OFF: 440.413709 | 440.368333 | 441.4365 → median 440.413709
 - list-contains ON:  416.465292 | 412.283291 | 415.475833 → median 415.475833
 Methodology:
 - Each test executed three times via Gradle; medians computed from `[DEBUG_LOG] [BENCH]` lines.
 - Changes are fully guarded by `PerfFlags.PRIMITIVE_FASTOPS`; semantics preserved (null on empty sum; generic fallback on mixed types).
 ### Phase B — Ranges for-in lowering (PRIMITIVE_FASTOPS) — 3× medians (OFF → ON)
 Date: 2025-11-11 13:48 (local)
 Environment:
 - JDK: OpenJDK 20.0.2.1 (Amazon Corretto 20.0.2.1+10-FR)
 - Gradle: 8.7
 - OS/Arch: macOS 14.8.1 (aarch64)
 | Optimization        | Benchmark/Test                          | OFF median (ms) | ON median (ms) | Speedup | Notes |
 |---------------------|------------------------------------------|-----------------:|----------------:|:-------:|-------|
 | PRIMITIVE_FASTOPS   | RangeBenchmarkTest::benchmarkIntRangeForIn |         1705.299 |         788.974 |  2.16×  | Tight counted loop for (Int..Int) for-in; preserves semantics |
 Inputs (3×):
 - range-for-in OFF: 1705.298958 | 1684.357708 | 1735.880917 → median 1705.298958
 - range-for-in ON:  794.178458 | 778.741834 | 788.973625 → median 788.973625
 Methodology:
 - Each configuration executed three times via Gradle; medians computed from `[DEBUG_LOG] [BENCH]` lines.
 - Lowering is guarded by `PerfFlags.PRIMITIVE_FASTOPS` and applies only when the source is an `ObjRange` with int bounds; otherwise falls back to generic iteration.
 ## Phase B — Regex caching (REGEX_CACHE) — 3× medians (OFF → ON)
 Date: 2025-11-11 13:48 (local)
 Environment:
 - JDK: OpenJDK 20.0.2.1 (Amazon Corretto 20.0.2.1+10-FR)
 - Gradle: 8.7
 - OS/Arch: macOS 14.8.1 (aarch64)
 | Flag         | Benchmark/Test                                  | OFF median (ms) | ON median (ms) | Speedup | Notes |
 |--------------|---------------------------------------------------|-----------------:|----------------:|:-------:|-------|
 | REGEX_CACHE  | RegexBenchmarkTest::benchmarkLiteralPatternMatches |          378.246 |         275.890 |  1.37×  | Caches compiled regex for identical literal pattern per iteration |
 | REGEX_CACHE  | RegexBenchmarkTest::benchmarkDynamicPatternMatches |          514.944 |         229.006 |  2.25×  | Two dynamic patterns alternate; cache size sufficient to retain both |
 Inputs (1× here; can extend to 3× on request):
 - regex-literal OFF: 378.245916; ON: 275.889541
 - regex-dynamic OFF: 514.944167; ON: 229.005834
 Methodology:
 - Each benchmark toggles `PerfFlags.REGEX_CACHE` inside a single test and prints `[DEBUG_LOG]` timings for OFF and ON runs under identical conditions. We recorded one set of OFF/ON timings here; we can extend to 3× medians if required for publication.
 - The cache is a tiny size-bounded map (64 entries) activated only when `PerfFlags.REGEX_CACHE` is true. Defaults remain OFF.
 ## JIT tweaks (Round 1) — quick gains snapshot (locals, ranges, list ops)
 Date: 2025-11-11 21:05 (local)
 Scope: fast confirmation of overall gain using current configuration; focused on locals, ranges, and list ops. Each test prints OFF → ON timings in a single run. We executed the benches via Gradle with stdout enabled and single test fork.
 Environment:
 - Gradle: 8.7 (stdout enabled, maxParallelForks=1)
 - JVM: as configured by toolchain for this project
 - OS/Arch: per developer machine (unchanged from prior sections)
 Reproduce:
 ```
 ./gradlew :lynglib:jvmTest --tests LocalVarBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests RangeBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests ListOpsBenchmarkTest --rerun-tasks
 ```
 Results (representative runs; OFF → ON):
 - Local variables — LOCAL_SLOT_PIC + EMIT_FAST_LOCAL_REFS
  - Run 1: 468.407 ms → 367.277 ms (≈ 1.28×)
  - Run 2: 447.031 ms → 346.126 ms (≈ 1.29×)
 - Ranges for‑in — PRIMITIVE_FASTOPS (tight counted loop for (Int..Int))
  - 1731.780 ms → 799.023 ms (≈ 2.17×)
 - List ops — PRIMITIVE_FASTOPS
  - sum(int list): 318.943 ms → 148.571 ms (≈ 2.15×)
  - contains(int in int list): 440.013 ms → 412.450 ms (≈ 1.07×)
 Summary: All three areas improved with optimizations ON; no regressions observed in these runs. For publication‑grade stability, run each test 3× and report medians (see sections below for methodology and previous median tables).
 ## Additional tweaks — verification snapshot (Index write fast‑path, List literal pre‑size, Regex LRU)
 Date: 2025-11-11 21:31 (local)
 Scope: Implemented three semantics‑neutral optimizations and verified they are green across targeted and broader JVM benches.
 What changed (guarded by flags where applicable):
 - RVAL_FASTPATH: Index write fast‑path
  - `IndexRef.setAt`: direct path for `ObjList` + `ObjInt` (`list[i] = value`) mirrors the read fast‑path. Optional chaining semantics preserved; bounds exceptions propagate unchanged.
 - RVAL_FASTPATH: List literal pre‑sizing
  - `ListLiteralRef.get`: pre‑counts element entries and uses `ArrayList` with capacity hint; for spreads of `ObjList`, uses `ensureCapacity` before bulk add. Evaluation order unchanged.
 - REGEX_CACHE: LRU‑like behavior
  - `RegexCache`: emulates access‑order LRU within a tiny bounded map (`MAX=64`) by moving accessed entries to the tail; improves alternating‑pattern scenarios. Only active when `PerfFlags.REGEX_CACHE` is true.
 Reproduce quick verification (1× runs):
 ```
 ./gradlew :lynglib:jvmTest --tests ExpressionBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests ListOpsBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests RegexBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests PicBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests PicInvalidationJvmTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests LocalVarBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests ConcurrencyCallBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests DeepPoolingStressJvmTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests MultiThreadPoolingStressJvmTest --rerun-tasks
 ```
 Observation: All listed tests green in this cycle; no behavioral regressions observed. For the new paths (index write, list literal), performance was neutral‑to‑positive in smoke runs; Regex benches remained positive or neutral with the LRU behavior. For publication‑grade medians, extend to 3× per test as in earlier sections.
 ## Sanity matrix (JVM) — quick OFF→ON runs
 Date: 2025-11-11 21:59 (local)
 Scope: Final Round 1 sanity sweep across JVM micro‑benches and stress tests to confirm that optimizations ON do not regress performance vs OFF in representative scenarios. Each benchmark prints `[DEBUG_LOG] [BENCH]` timings for OFF → ON within a single run. This section records a quick pass confirmation (not 3× medians) and reproduction commands.
 Environment:
 - Gradle: 8.7 (stdout enabled, maxParallelForks=1)
 - JVM: as configured by the project toolchain
 - OS/Arch: macOS 14.x (aarch64)
 Benches covered (all green; no regressions observed in these runs):
 - Calls/Args: `CallBenchmarkTest`, `CallMixedArityBenchmarkTest` (ARG_BUILDER)
 - PICs: `PicBenchmarkTest` (field/method); `PicInvalidationJvmTest` correctness reconfirmed
 - Expressions/Arithmetic: `ExpressionBenchmarkTest`, `ArithmeticBenchmarkTest` (RVAL_FASTPATH, PRIMITIVE_FASTOPS)
 - Ranges: `RangeBenchmarkTest` (PRIMITIVE_FASTOPS counted loop)
 - List ops: `ListOpsBenchmarkTest` (PRIMITIVE_FASTOPS specializations)
 - Regex: `RegexBenchmarkTest` (REGEX_CACHE with LRU behavior)
 - Locals: `LocalVarBenchmarkTest` (LOCAL_SLOT_PIC + FAST_LOCAL)
 - Concurrency/Pooling: `ConcurrencyCallBenchmarkTest`, `DeepPoolingStressJvmTest`, `MultiThreadPoolingStressJvmTest` (SCOPE_POOL per‑thread)
 Reproduce (examples):
 ```
 ./gradlew :lynglib:jvmTest --tests CallBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests CallMixedArityBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests PicBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests PicInvalidationJvmTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests ExpressionBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests ArithmeticBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests RangeBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests ListOpsBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests RegexBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests LocalVarBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests ConcurrencyCallBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests DeepPoolingStressJvmTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests MultiThreadPoolingStressJvmTest --rerun-tasks
 ```
  Summary:
  - All listed tests passed in this sanity sweep.
  - For each benchmark’s OFF → ON printouts examined during this pass, ON was equal or faster than OFF; no ON<OFF regressions were observed.
  - For publication‑grade numbers, use the 3× medians methodology outlined earlier in this document. The existing median tables in previous sections remain representative, and the additional tweaks (Index write, List literal pre‑size, Regex LRU, Field PIC 4‑way + read→write reuse, mixed Int/Real fast‑ops) remained neutral‑to‑positive.
 ## Quick snapshot — IndexRef PIC + negative miss cache (JVM) — 3× medians (OFF → ON)
 Date: 2025-11-11 22:32 (local)
 Scope
 - Confirm that the latest changes — IndexRef read/write PIC (stacked on RVAL_FASTPATH) and safe catch‑and‑cache negative entries for Field/Method PICs — do not regress performance. We collected 3× medians for the two expression sub‑benches that are most sensitive to RVAL paths and cross‑checked PICs and ranges.
 Environment
 - Gradle: 8.7 (stdout enabled, maxParallelForks=1)
 - JVM: project toolchain default
 - OS/Arch: macOS 14.x (aarch64)
 Results (3× medians)
 | Area | Benchmark/Test | OFF median (ms) | ON median (ms) | Speedup | Notes |
 |------|-----------------|-----------------:|----------------:|:-------:|-------|
 | RVAL_FASTPATH | ExpressionBenchmarkTest::benchmarkListIndexReads | 304.282 | 229.168 | 1.33× | IndexRef direct fast‑path for ObjList+ObjInt; 4‑way Index PIC handles polymorphic cases |
 | RVAL_FASTPATH | ExpressionBenchmarkTest::benchmarkFieldReadPureReceiver | 275.122 | 194.876 | 1.41× | Monomorphic, immutable receiver path; preserves visibility/optional semantics |
 Cross‑checks (from the same session, 1× quick)
 - PicBenchmarkTest::benchmarkFieldGetSetPic — OFF 203.701 ms → ON 117.129 ms (≈1.74×)
 - PicBenchmarkTest::benchmarkMethodPic — OFF 280.806 ms → ON 202.613 ms (≈1.39×)
 - RangeBenchmarkTest::benchmarkIntRangeForIn — OFF 1762.425 ms → ON 806.898 ms (≈2.18×)
 Reproduce
 ```
 ./gradlew :lynglib:jvmTest --tests "ExpressionBenchmarkTest.benchmarkListIndexReads" --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests "ExpressionBenchmarkTest.benchmarkListIndexReads" --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests "ExpressionBenchmarkTest.benchmarkListIndexReads" --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests "ExpressionBenchmarkTest.benchmarkFieldReadPureReceiver" --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests "ExpressionBenchmarkTest.benchmarkFieldReadPureReceiver" --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests "ExpressionBenchmarkTest.benchmarkFieldReadPureReceiver" --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests PicBenchmarkTest --rerun-tasks
 ./gradlew :lynglib:jvmTest --tests RangeBenchmarkTest --rerun-tasks
 ```
 Notes
 - Negative caches are installed only after a real miss throws (cache‑after‑miss), preserving error semantics and invalidation on `layoutVersion` changes.
 - IndexRef PIC augments the existing direct path and uses move‑to‑front promotion; it is keyed on `(classId, layoutVersion)` like other PICs.
@@ -0,0 +1,58 @@
 # JVM-only Performance Optimization Plan (Saved)
 [//]: # (excludeFromIndex)
 Date: 2025-11-10 22:14 (local)
 This document captures the agreed next optimization steps so we can restore the plan later if needed.
 ## Objectives
 - Reduce overhead on the call/argument path.
 - Extend and harden PIC performance (fields/methods/locals).
 - Improve R-value fast paths and interpreter hot nodes (loops, ranges, lists).
 - Make scope frame pooling thread-safe on JVM so it can be enabled by default later.
 - Keep semantics correct and all JVM tests green.
 ## Prioritized tasks (now)
 1) Call/argument path: fewer allocs, tighter fast paths
 - Extend small-arity zero-alloc path to 6–8 args; benchmark with `CallMixedArityBenchmarkTest`.
 - Splat handling: fast-path single-list splats; benchmark with `CallSplatBenchmarkTest`.
 - Arg builder micro-optimizations: capacity hints, avoid redundant copies, inline simple branches.
 - Optional-chaining fast return (`SKIP_ARGS_ON_NULL_RECEIVER`) coverage audit, add A/B bench.
 2) Scope frame pooling: per-thread safety on JVM
 - Replace global deque with ThreadLocal pool on JVM (and Android) actuals.
 - Keep `frameId` uniqueness and pool size cap.
 - Verify with `DeepPoolingStressJvmTest`, `CallPoolingBenchmarkTest`, and spot benches.
 - Do NOT flip default yet; keep `SCOPE_POOL=false` unless explicitly approved.
 ## Next tasks (queued)
 3) PICs: cheaper misses, broader hits
 - Method PIC 2→3/4 entries (tiny LRU); validate with `PicInvalidationJvmTest`.
 - Field PIC micro-fast path for read-then-write pairs.
 4) Locals and slots
 - Ensure `EMIT_FAST_LOCAL_REFS` coverage across compiler sites.
 - Pre-size `slots`/`nameToSlot` when local counts are known; re-run `LocalVarBenchmarkTest`.
 5) R-value fast path coverage
 - Cover index reads on primitive lists, pure receivers, assignment RHS where safe.
 - Add benches in `ExpressionBenchmarkTest`.
 6) Collections & ranges
 - Tight counted loop for `(Int..Int)` in `for`.
 - Primitive-specialized `ObjList` ops (`map`, `filter`, `sum`, `contains`) under `PRIMITIVE_FASTOPS`.
 7) Regex and string ops
 - Cache compiled regex for string literals at compile time; tiny LRU for dynamic patterns under a new `REGEX_CACHE` flag.
 8) JIT micro-tweaks
 - Inline tiny helpers; prefer arrays for hot buffers; finalize hot classes where safe.
 ## Validation matrix
 - Always re-run: `CallBenchmarkTest`, `CallMixedArityBenchmarkTest`, `PicBenchmarkTest`, `ExpressionBenchmarkTest`, `ArithmeticBenchmarkTest`, `CallPoolingBenchmarkTest`, `DeepPoolingStressJvmTest`.
 - Use 3× medians where comparing flags; keep `:lynglib:jvmTest` green.
 ## Notes
 - All risky changes remain flag-guarded and JVM-only where applicable.
 - Documentation and perf tables updated after each cycle.
@@ -0,0 +1,95 @@
 # Map literals — refined proposal
 [//]: # (excludeFromIndex)
 Implement JavaScript-like literals for maps. The syntax and semantics align with named arguments in function calls, but map literals are expressions that construct `Map` values.
 Keys can be either:
 - string literals: `{ "some key": value }`, or
 - identifiers: `{ name: expr }`, where the key becomes the string `"name"`.
 Identifier shorthand inside map literals is supported:
 - `{ name: }` desugars to `{ "name": name }`.
 Property access sugar is not provided for maps: use bracket access only, e.g. `m["a"]`, not `m.a`.
 Examples:
 ```lyng
 val x = 2
 val m = { "a": 1, x: x*10, y: }
 assertEquals(1, m["a"])      // string-literal key
 assertEquals(20, m["x"])     // identifier key
 assertEquals(2, m["y"])      // identifier shorthand
 ```
 Spreads (splats) in map literals are allowed and merged left-to-right with “rightmost wins” semantics:
 ```lyng
 val base = { a: 1, b: 2 }
 val m = { a: 0, ...base, b: 3, c: 4 }
 assertEquals(1, m["a"])  // base overwrites a:0
 assertEquals(3, m["b"])  // literal overwrites spread
 assertEquals(4, m["c"])  // new key
 ```
 Trailing commas are allowed (optional):
 ```lyng
 val m = {
  "a": 1,
  b: 2,
  ...other,
 }
 ```
 Duplicate keys among literal entries (including identifier shorthand) are a compile-time error:
 ```lyng
 { foo: 1, "foo": 2 }   // error: duplicate key "foo"
 { foo:, foo: 2 }        // error: duplicate key "foo"
 ```
 Spreads are evaluated at runtime. Overlaps from spreads are resolved by last write wins. If a spread is not a map, or yields a map with non-string keys, it’s a runtime error.
 Merging with `+`/`+=` and entries:
 ```lyng
 ("1" => 10) + ("2" => 20)     // Map("1"=>10, "2"=>20)
 { "1": 10 } + ("2" => 20)     // same
 { "1": 10 } + { "2": 20 }    // same
 var m = { "a": 1 }
 m += ("b" => 2)                 // m = { "a":1, "b":2 }
 ```
 Rightmost wins on duplicates consistently across spreads and merges. All map merging operations require string keys; encountering a non-string key during merge is a runtime error.
 Empty map literal `{}` is not supported to avoid ambiguity with blocks/lambdas. Use `Map()` for an empty map.
 Lambda disambiguation
 - A `{ ... }` with typed lambda parameters must have a top-level `->` in its header. The compiler disambiguates by looking for a top-level `->`. If none is found, it attempts to parse a map literal; if that fails, it is parsed as a lambda or block.
 Grammar (EBNF)
 ```
 ws                    = zero or more whitespace (incl. newline/comments)
 map_literal           = '{' ws map_entries ws '}'
 map_entries           = map_entry ( ws ',' ws map_entry )* ( ws ',' )?
 map_entry             = map_key ws ':' ws map_value_opt
                      | '...' ws expression
 map_key               = string_literal | ID
 map_value_opt         = expression | ε   // ε allowed only if map_key is ID
 ```
 Notes:
 - Identifier shorthand (`id:`) is allowed only for identifiers, not string-literal keys.
 - Spreads accept any expression; at runtime it must yield a `Map` with string keys.
 - Duplicate keys are detected at compile time among literal keys; spreads are merged at runtime with last-wins.
 Rationale
 - The `{ name: value }` style is familiar and ergonomic.
 - Disambiguation with lambdas leverages the required `->` in typed lambda headers.
 - Avoiding `m.a` sidesteps method/field shadowing and keeps semantics clear.
@@ -0,0 +1,70 @@
 # Named arguments in calls
 [//]: # (excludeFromIndex)
 Extend function/method calls to allow setting arguments by name using colon syntax at call sites. This is especially convenient with many parameters and default values.
 Examples:
 ```lyng
    fun test(a="foo", b="bar", c="bazz") { [a, b, c] }
    assertEquals(test(b: "b"), ["foo", "b", "bazz"])
    assertEquals(test("a", c: "c"), ["a", "bar", "c"])
 ```
 Rules:
 - Named arguments are optional. If named arguments are present, their order is not important.
 - Named arguments must follow positional arguments; positional arguments cannot follow named ones (the only exception is the syntactic trailing block outside parentheses, see below).
 - A named argument cannot reassign a parameter already set positionally.
 - If the last parameter is already assigned by a named argument (or named splat), the trailing-lambda rule must NOT apply: a following `{ ... }` after the call is an error.
 Rationale for using `:` instead of `=` in calls: in Lyng, assignment `=` is an expression; using `:` avoids ambiguity and keeps declarations (`name: Type`) distinct from call sites, where casting uses `as` / `as?`.
 Migration note: earlier drafts/examples used `name = value`. The final syntax is `name: value` at call sites.
 ## Extended call argument splats: named splats
 With named arguments, splats (`...`) are extended to support maps as named splats. When a splat evaluates to a Map, its entries provide name→value assignments:
 ```lyng
    fun test(a="a", b="b", c="c", d="d") { [a, b, c, d] }
    assertEquals(test("A?", ...Map("d" => "D!", "b" => "B!")), ["A?", "B!", "c", "D!"])
 ```
 Constraints for named splats:
 - Only string keys are allowed in map splats; otherwise, a clean error is thrown.
 - Named splats cannot reassign parameters already set (positionally or by earlier named arguments/splats).
 - Named splats follow the same ordering as named arguments: they must appear after all positional arguments and positional splats.
 ## Trailing-lambda interaction
 Lyng supports a syntactic trailing block after a call: `f(args) { ... }`. With named args/splats, if the last parameter is already assigned by name, the trailing block must not apply and the call is an error:
 ```lyng
    fun f(x, onDone) { onDone(x) }
    f(x: 1) { 42 }    // ERROR: last parameter already assigned by name
    f(1) { 42 }       // OK
 ```
 ## Errors (non-exhaustive)
 - Positional argument after any named argument inside parentheses: error.
 - Positional splat after any named argument: error.
 - Duplicate named assignment (directly or via map splats): error.
 - Unknown parameter name in a named argument/splat: error.
 - Map splat with non-string keys: error.
 - Attempt to target the ellipsis parameter by name: error.
 ## Notes
 - Declarations continue to use `:` for types, while call sites use `:` for named arguments and `as` / `as?` for type casts/checks.
@@ -0,0 +1,25 @@
 #!/bin/env lyng
 import lyng.io.fs
 import lyng.stdlib
 val files = Path("../..").list().toList()
 // most long is longest?
 val longestNameLength = files.maxOf { it.name.length }
 // testdoc
 fun test() {
    22
 }
 val format = "%"+(longestNameLength+1) +"s %d"
 for( f in files )
 {
    var name = f.name
    if( f.isDirectory() )
        name += "/"
    println( format(name, f.size()) )
 }
@@ -19,12 +19,13 @@ fun naiveCountHappyNumbers() {
 import lyng.time
 //
-// After all optimizations it takes ~120ms.
+// After all optimizations it took ~120ms - before.
 //
-for( r in 1..100 ) {
+for( r in 1..900 ) {
    val start = Instant.now()
    val found = naiveCountHappyNumbers()
    println("Found happy numbers: %d time %s"(found, Instant.now() - start))
    assert( found == 55252 )
-    delay(0.1)
+    delay(0.05)
 }
@@ -0,0 +1,10 @@
 #!/bin/env lyng
 val переменная = "значение"
 val data = { greeting: "привет", переменная:, поле: "содержимое" }
 assertEquals(data["переменная"], "значение")
 assertEquals(data["поле"], "содержимое")
 println(data)
@@ -1,7 +1,7 @@
 #!/bin/env lyng
 /*
    Calculate the limit of Sum( f(n) )
    until it reaches asymptotic limit 0.00001% change
    return null or found limit
 */
 fun findSumLimit(f) {
@@ -0,0 +1,75 @@
 # Scopes and Closures: resolution and safety
 This page documents how name resolution works with `ClosureScope`, how to avoid recursion pitfalls, and how to safely capture and execute callbacks that need access to outer locals.
 ## Why this matters
 Name lookup across nested scopes and closures can accidentally form recursive resolution paths or hide expected symbols (outer locals, module/global functions). The rules below ensure predictable resolution and prevent infinite recursion.
 ## Resolution order in ClosureScope
 When evaluating an identifier `name` inside a closure, `ClosureScope.get(name)` resolves in this order:
 1. Closure frame locals and arguments
 2. Captured receiver (`closureScope.thisObj`) instance/class members
 3. Closure ancestry locals + each frame’s `thisObj` members (cycle‑safe)
 4. Caller `this` members
 5. Caller ancestry locals + each frame’s `thisObj` members (cycle‑safe)
 6. Module pseudo‑symbols (e.g., `__PACKAGE__`) from the nearest `ModuleScope`
 7. Direct module/global fallback (nearest `ModuleScope` and its parent/root scope)
 8. Final fallback: base local/parent lookup for the current frame
 This preserves intuitive visibility (locals → captured receiver → closure chain → caller members → caller chain → module/root) while preventing infinite recursion between scope types.
 ## Use raw‑chain helpers for ancestry walks
 When authoring new scope types or advanced lookups, avoid calling virtual `get` while walking parents. Instead, use the non‑dispatch helpers on `Scope`:
 - `chainLookupIgnoreClosure(name)`
  - Walk raw `parent` chain and check only per‑frame locals/bindings/slots.
  - Ignores overridden `get` (e.g., in `ClosureScope`). Cycle‑safe.
 - `chainLookupWithMembers(name)`
  - Like above, but after locals/bindings it also checks each frame’s `thisObj` members.
  - Ignores overridden `get`. Cycle‑safe.
 - `baseGetIgnoreClosure(name)`
  - For the current frame only: check locals/bindings, then walk raw parents (locals/bindings), then fallback to this frame’s `thisObj` members.
 These helpers avoid ping‑pong recursion and make structural cycles harmless (lookups terminate).
 ## Preventing structural cycles
 - Don’t construct parent chains that can point back to a descendant.
 - A debug‑time guard throws if assigning a parent would create a cycle; keep it enabled for development builds.
 - Even with a cycle, chain helpers break out via a small `visited` set keyed by `frameId`.
 ## Capturing lexical environments for callbacks
 For dynamic objects or custom builders, capture the creator’s lexical scope so callbacks can see outer locals/parameters:
 1. Use `snapshotForClosure()` on the caller scope to capture locals/bindings/slots and parent.
 2. Store this snapshot and run callbacks under `ClosureScope(callScope, captured)`.
 Kotlin sketch:
 ```kotlin
 val captured = scope.snapshotForClosure()
 val execScope = ClosureScope(currentCallScope, captured)
 callback.execute(execScope)
 ```
 This ensures expressions like `contractName` used inside dynamic `get { name -> ... }` resolve to outer variables defined at the creation site.
 ## Closures in coroutines (launch/flow)
 - The closure frame still prioritizes its own locals/args.
 - Outer locals declared before suspension points remain visible through slot‑aware ancestry lookups.
 - Global functions like `delay(ms)` and `yield()` are resolved via module/root fallbacks from within closures.
 Tip: If a closure unexpectedly cannot see an outer local, check whether an intermediate runtime helper introduced an extra call frame; the built‑in lookup already traverses caller ancestry, so prefer the standard helpers rather than custom dispatch.
 ## Local variable references and missing symbols
 - Unqualified identifier resolution first prefers locals/bindings/slots before falling back to `this` members.
 - If neither locals nor members contain the symbol, missing field lookups map to `SymbolNotFound` (compatibility alias for `SymbolNotDefinedException`).
 ## Performance notes
 - The `visited` sets used for cycle detection are tiny and short‑lived; in typical scripts the overhead is negligible.
 - If profiling shows hotspots, consider limiting ancestry depth in your custom helpers or using small fixed arrays instead of hash sets—only for extremely hot code paths.
 ## Dos and Don’ts
 - Do use `chainLookupIgnoreClosure` / `chainLookupWithMembers` for ancestry traversals.
 - Do maintain the resolution order above for predictable behavior.
 - Don’t call virtual `get` while walking parents; it risks recursion across scope types.
 - Don’t attach instance scopes to transient/pool frames; bind to a stable parent scope instead.
@@ -0,0 +1,77 @@
 # TextMate bundle
 [//]: # (excludeFromIndex)
 The TextMate-format bundle contains a syntax definition for initial language support in
 popular editors that understand TextMate grammars: TextMate, Visual Studio Code, Sublime Text, etc.
 - [Download TextMate Bundle for Lyng](https://lynglang.com/distributables/lyng-textmate.zip)
 > Note for IntelliJ-based IDEs (IntelliJ IDEA, Fleet, etc.): although you can import TextMate
 > bundles there (Settings/Preferences → Editor → TextMate Bundles), we strongly recommend using the
 > dedicated plugin instead — it provides much better support (formatting, smart enter, background
 > analysis, etc.). See: [IDEA Plugin](#/docs/idea_plugin.md).
 ## Visual Studio Code
 VS Code uses TextMate grammars packaged as extensions. A minimal local extension is easy to set up:
 1) Download and unzip the bundle above. Inside you will find the grammar file (usually
   `*.tmLanguage.json` or `*.tmLanguage` plist).
 2) Create a new folder somewhere, e.g. `lyng-textmate-vscode/` with the following structure:
 ```
 lyng-textmate-vscode/
  package.json
  syntaxes/
    lyng.tmLanguage.json   # copy the grammar file here (rename if needed)
 ```
 3) Put this minimal `package.json` into that folder (adjust file names if needed):
 ```
 {
  "name": "lyng-textmate",
  "displayName": "Lyng (TextMate grammar)",
  "publisher": "local",
  "version": "0.0.1",
  "engines": { "vscode": "^1.70.0" },
  "contributes": {
    "languages": [
      { "id": "lyng", "aliases": ["Lyng"], "extensions": [".lyng"] }
    ],
    "grammars": [
      {
        "language": "lyng",
        "scopeName": "source.lyng",
        "path": "./syntaxes/lyng.tmLanguage.json"
      }
    ]
  }
 }
 ```
 4) Open a terminal in `lyng-textmate-vscode/` and run:
 ```
 code --install-extension .
 ```
   Alternatively, open the folder in VS Code and press F5 to run an Extension Development Host.
 5) Reload VS Code. Files with the `.lyng` extension should now get Lyng highlighting.
 ## Sublime Text 3/4
 1) Download and unzip the bundle.
 2) In Sublime Text, use “Preferences → Browse Packages…”, then copy the unzipped bundle
   to a folder like `Packages/Lyng/`.
 3) Open a `.lyng` file; Sublime should pick up the syntax automatically. If not, use
   “View → Syntax → Lyng”.
 ## TextMate 2
 1) Download and unzip the bundle.
 2) Double‑click the `.tmBundle`/grammar package or drag it onto TextMate to install, or place
   it into `~/Library/Application Support/TextMate/Bundles/`.
 3) Restart TextMate if needed and open a `.lyng` file.
@@ -1,8 +1,3 @@
 ---
 gitea: none
 include_toc: true
 ---
 # Lyng tutorial
 Lyng is a very simple language, where we take only most important and popular features from
@@ -11,9 +6,10 @@ In other word, the code usually works as expected when you see it. So, nothing u
 __Other documents to read__ maybe after this one:
- [Advanced topics](advanced_topics.md), [declaring arguments](declaring_arguments.md)
+- [Advanced topics](advanced_topics.md), [declaring arguments](declaring_arguments.md), [Scopes and Closures](scopes_and_closures.md)
 - [OOP notes](OOP.md), [exception handling](exceptions_handling.md)
- [math in Lyng](math.md)
+- [math in Lyng](math.md), [the `when` statement](when.md)
 - [Testing and Assertions](Testing.md)
 - [time](time.md) and [parallelism](parallelism.md)
 - [parallelism] - multithreaded code, coroutines, etc.
 - Some class
@@ -71,6 +67,26 @@ You can use blocks in if statement, as expected:
    limited
    >>> 120.0
 ## Enums (quick intro)
 Lyng supports simple enums for a fixed set of named constants. Declare with `enum Name { ... }` and use entries as `Name.ENTRY`.
    enum Color {
        RED, GREEN, BLUE
    }
    assert( Color.RED is Color )
    assertEquals( 0, Color.RED.ordinal )
    assertEquals( "BLUE", Color.BLUE.name )
    // All entries as a list, in order:
    assertEquals( [Color.RED, Color.GREEN, Color.BLUE], Color.entries )
    // Lookup by name:
    assertEquals( Color.GREEN, Color.valueOf("GREEN") )
 For more details (usage patterns, `when` switching, serialization), see OOP notes: [Enums in detail](OOP.md#enums).
 When putting multiple statments in the same line it is convenient and recommended to use `;`:
    var from; var to
@@ -91,6 +107,41 @@ Assignemnt is an expression that changes its lvalue and return assigned value:
    >>> 11
    >>> 6
 ### Destructuring assignments
 Lyng supports destructuring assignments for lists. This allows you to unpack list elements into multiple variables at once:
    val [a, b, c] = [1, 2, 3]
    assertEquals(1, a)
    assertEquals(2, b)
    assertEquals(3, c)
 It also supports *splats* (ellipsis) to capture multiple elements into a list:
    val [head, rest...] = [1, 2, 3]
    assertEquals(1, head)
    assertEquals([2, 3], rest)
    val [first, middle..., last] = [1, 2, 3, 4, 5]
    assertEquals(1, first)
    assertEquals([2, 3, 4], middle)
    assertEquals(5, last)
 Destructuring can be nested:
    val [x, [y, z...]] = [1, [2, 3, 4]]
    assertEquals(1, x)
    assertEquals(2, y)
    assertEquals([3, 4], z)
 And it can be used for reassigning existing variables, for example, to swap values:
    var x = 5
    var y = 10
    [x, y] = [y, x]
    assertEquals(10, x)
    assertEquals(5, y)
 As the assignment itself is an expression, you can use it in strange ways. Just remember
 to use parentheses as assignment operation insofar is left-associated and will not
 allow chained assignments (we might fix it later). Use parentheses insofar:
@@ -210,7 +261,7 @@ Much like let, but it does not alter returned value:
    >>> void
 While it is not altering return value, the source object could be changed:
-
+also
    class Point(x,y)
    val p = Point(1,2).also { it.x++ }
    assertEquals(p.x, 2)
@@ -296,8 +347,6 @@ Reference quality and object equality example:
    assert( null == null)  // singletons
    assert( null === null)
    // but, for non-singletons:
    assert( 5 == 5)
    assert( 5 !== 5)
    assert( "foo" !== "foo" )
    >>> void
@@ -314,7 +363,7 @@ will be thrown:
    // WRONG! Exception will be thrown at next line:
    foo + "bar"
-Correct pattern is:
+The correct pattern is:
    foo = "foo"
    // now is OK:
@@ -388,6 +437,19 @@ It is possible to define also vararg using ellipsis:
 See the [arguments reference](declaring_arguments.md) for more details.
 ## Named arguments
 When calling functions, you can use named arguments with the colon syntax `name: value`. This is particularly useful when you have many parameters with default values.
 ```lyng
    fun test(a="foo", b="bar", c="bazz") { [a, b, c] }
    assertEquals(["foo", "b", "bazz"], test(b: "b"))
    assertEquals(["a", "bar", "c"], test("a", c: "c"))
 ```
 **Note for Kotlin users:** Lyng uses `:` instead of `=` for named arguments at call sites. This is because in Lyng, `=` is an expression that returns the assigned value, and using it in an argument list would create ambiguity.
 ## Closures
 Each __block has an isolated context that can be accessed from closures__. For example:
@@ -463,6 +525,8 @@ one could be with ellipsis that means "the rest pf arguments as List":
 ### Using lambda as the parameter
 See also: [Testing and Assertions](Testing.md)
    // note that fun returns its last calculated value,
    // in our case, result after in-place addition:
    fun mapValues(iterable, transform) {
@@ -681,14 +745,63 @@ Please see [Set] for detailed description.
 # Maps
-Maps are unordered collection of key-value pairs, where keys are unique. See [Map] for details. Map also
+Maps are unordered collections of key-value pairs, where keys are unique. Maps are also [Iterable].
 are [Iterable]:
-    val m = Map( "foo" => 77, "bar" => "buzz" )
+You can create them either with the classic constructor (still supported):
-    assertEquals( m["foo"], 77 )
+
    val old = Map( "foo" => 77, "bar" => "buzz" )
    assertEquals( old["foo"], 77 )
    >>> void
-Please see [Map] reference for detailed description on using Maps.
+…or with map literals, which are often more convenient:
    val x = 10
    val y = 10
    val m = { "a": 1, x: x * 2, y: }
    // identifier keys become strings; `y:` is shorthand for y: y
    assertEquals(1, m["a"])      // string-literal key
    assertEquals(20, m["x"])     // identifier key
    assertEquals(10, m["y"])     // shorthand
    >>> void
 Map literals support trailing commas for nicer diffs:
    val m2 = {
        "a": 1,
        b: 2,
    }
    assertEquals(1, m2["a"]) 
    assertEquals(2, m2["b"]) 
    >>> void
 You can spread other maps inside a literal with `...`. Items merge left-to-right and the rightmost value wins:
    val base = { a: 1, b: 2 }
    val merged = { a: 0, ...base, b: 3, c: 4 }
    assertEquals(1, merged["a"])  // base overwrites a:0
    assertEquals(3, merged["b"])  // literal overwrites spread
    assertEquals(4, merged["c"])  // new key
    >>> void
 Merging also works with `+` and `+=`, and you can combine maps and entries conveniently:
    val m3 = { "a": 10 } + ("b" => 20)
    assertEquals(10, m3["a"]) 
    assertEquals(20, m3["b"]) 
    var m4 = ("x" => 1) + ("y" => 2)      // entry + entry → Map
    m4 += { z: 3 }                          // merge literal
    assertEquals(1, m4["x"]) 
    assertEquals(2, m4["y"]) 
    assertEquals(3, m4["z"]) 
    >>> void
 Notes:
 - Access keys with brackets: `m["key"]`. There is no `m.key` sugar.
 - Empty `{}` remains a block/lambda; use `Map()` to create an empty map.
 - When you need computed (expression) keys or non-string keys, use `Map(...)` constructor with entries, e.g. `Map( ("a" + "b") => 1 )`, then merge with a literal if needed: `{ base: } + (computedKey => 42)`.
 Please see the [Map] reference for a deeper guide.
 # Flow control operators
@@ -717,6 +830,8 @@ Or, more neat:
 ## When
 See also: [Comprehensive guide to `when`](when.md)
 It is very much like the kotlin's:
    fun type(x) {
@@ -1218,7 +1333,7 @@ same as:
 Are the same as in string literals with little difference:
 | escape | ASCII value           |
-|--------|-------------------|
+|--------|-----------------------|
 | \n     | 0x10, newline         |
 | \r     | 0x13, carriage return |
 | \t     | 0x07, tabulation      |
@@ -1290,7 +1405,6 @@ Open-ended ranges could be used to get start and end too:
    assertEquals( "pult", "catapult"[ 4.. ])
    >>> void
 ### String operations
 Concatenation is a `+`: `"hello " + name` works as expected. No confusion. There is also
@@ -1314,12 +1428,13 @@ Part match:
 Typical set of String functions includes:
 | fun/prop             | description / notes                                        |
-|--------------------|------------------------------------------------------------|
+|----------------------|------------------------------------------------------------|
-| lower()            | change case to unicode upper                               |
+| lower(), lowercase() | change case to unicode upper                               |
-| upper()            | change case to unicode lower                               |
+| upper(), uppercase() | change case to unicode lower                               |
 | trim()               | trim space chars from both ends                            |
 | startsWith(prefix)   | true if starts with a prefix                               |
 | endsWith(prefix)     | true if ends with a prefix                                 |
 | last()               | get last character of a string or throw                    |
 | take(n)              | get a new string from up to n first characters             |
 | takeLast(n)          | get a new string from up to n last characters              |
 | drop(n)              | get a new string dropping n first chars, or empty string   |
@@ -1338,7 +1453,6 @@ Typical set of String functions includes:
 | matches(re)          | matches the regular expression (2)                         |
 |                      |                                                            |
 (1)
 : List is mutable therefore a new copy is created on each call.
@@ -1372,8 +1486,8 @@ if blank, will be removed too, for example:
 See [math functions](math.md). Other general purpose functions are:
 | name                                  | description                                                |
-|----------------------------------------------|------------------------------------------------------------|
+|---------------------------------------|------------------------------------------------------------|
-| assert(condition,message="assertion failed") | runtime code check. There will be an option to skip them   |
+| assert(condition, fn)                 | (1) runtime code check with generic or custom nessage `fn` |
 | assertEquals(a,b)                     |                                                            |
 | assertNotEquals(a,b)                  |                                                            |
 | assertTrows { /* block */ }           |                                                            |
@@ -1386,6 +1500,12 @@ See [math functions](math.md). Other general purpose functions are:
 | cached(builder)                       | remembers builder() on first invocation and return it then |
 | let, also, apply, run                 | see above, flow controls                                   |
 (1)
 : `fn` is optional lambda returning string message to add to exception string. 
 Lambda avoid unnecessary execution if assertion is not failed. for example:
    assert( x < 10 ) { "x=%s should be < 10"(x) } 
 # Built-in constants
 | name                                | description                  |
@@ -1395,6 +1515,8 @@ See [math functions](math.md). Other general purpose functions are:
 [List]: List.md
 [Testing]: Testing.md
 [Iterable]: Iterable.md
 [Iterator]: Iterator.md
@@ -1422,3 +1544,92 @@ See [math functions](math.md). Other general purpose functions are:
 [Array]: Array.md
 [Regex]: Regex.md
 ## Multiple Inheritance (quick start)
 Lyng supports multiple inheritance (MI) with simple, predictable rules. For a full reference see OOP notes, this is a quick, copy‑paste friendly overview.
 Declare a class with multiple bases and pass constructor arguments to each base in the header:
 ```
 class Foo(val a) {
    var tag = "F"
    fun runA() { "ResultA:" + a }
    fun common() { "CommonA" }
    private fun privateInFoo() {}
    protected fun protectedInFoo() {}
 }
 class Bar(val b) {
    var tag = "B"
    fun runB() { "ResultB:" + b }
    fun common() { "CommonB" }
 }
 class FooBar(a, b) : Foo(a), Bar(b) {
    // Inside class bodies you can qualify with this@Type
    fun fromFoo() { this@Foo.common() }
    fun fromBar() { this@Bar.common() }
 }
 val fb = FooBar(1, 2)
 assertEquals("ResultA:1", fb.runA())
 assertEquals("ResultB:2", fb.runB())
 // Unqualified ambiguous member uses the first base (leftmost)
 assertEquals("CommonA", fb.common())
 // Disambiguate with casts
 assertEquals("CommonB", (fb as Bar).common())
 assertEquals("CommonA", (fb as Foo).common())
 // Field collisions: unqualified read/write uses the first in order
 assertEquals("F", fb.tag)
 fb.tag = "X"
 assertEquals("X", fb.tag)          // Foo.tag updated
 assertEquals("X", (fb as Foo).tag) // qualified read: Foo.tag
 assertEquals("B", (fb as Bar).tag) // qualified read: Bar.tag
 // Qualified write targets the chosen base storage
 (fb as Bar).tag = "Y"
 assertEquals("X", (fb as Foo).tag)
 assertEquals("Y", (fb as Bar).tag)
 // Optional casts with safe call
 class Buzz : Bar(3)
 val buzz = Buzz()
 assertEquals("ResultB:3", buzz.runB())
 assertEquals("ResultB:3", (buzz as? Bar)?.runB())
 assertEquals(null, (buzz as? Foo)?.runA())
 ```
 Notes:
 - Resolution order uses C3 MRO (active): deterministic, monotonic order suitable for diamonds and complex hierarchies. Example: for `class D() : B(), C()` where both `B()` and `C()` derive from `A()`, the C3 order is `D → B → C → A`. The first visible match wins.
 - `private` is visible only inside the declaring class; `protected` is visible from the declaring class and any of its transitive subclasses. Qualialsofication (`this@Type`) or casts do not bypass visibility.
 - Safe‑call `?.` works with `as?` for optional dispatch.
 ## Extension members
 You can add new methods and properties to existing classes without modifying them.
 ### Extension functions
    fun String.shout() = this.upper() + "!!!"
    "hello".shout()
    >>> "HELLO!!!"
 ### Extension properties
    val Int.isEven = this % 2 == 0
    4.isEven
    >>> true
 Example with custom accessors:
    val String.firstChar get() = this[0]
    "abc".firstChar
    >>> 'a'
 Extension members are **scope-isolated**: they are visible only in the scope where they are defined and its children. This prevents name collisions and improves security.
 To get details on OOP in Lyng, see [OOP notes](OOP.md).
@@ -0,0 +1,241 @@
 # The `when` statement (expression)
 [//]: # (topMenu)
 Lyng provides a concise multi-branch selection with `when`, heavily inspired by Kotlin. In Lyng, `when` is an expression: it evaluates to a value. If the selected branch contains no value (e.g., it ends with `void` or calls a void function like `println`), the whole `when` expression evaluates to `void`.
 Currently, Lyng implements the "subject" form: `when(value) { ... }`. The subject-less form `when { condition -> ... }` is not implemented yet.
 ## Quick examples
    val r1 = when("a") {
        "a" -> "ok"
        else -> "nope"
    }
    assertEquals("ok", r1)
    val r2 = when(5) {
        3 -> "no"
        4 -> "no"
        else -> "five"
    }
    assertEquals("five", r2)
    val r3 = when(5) {
        3 -> "no"
        4 -> "no"
    }
    // no matching case and no else → `void`
    assert(r3 == void)
    >>> void
 ## Syntax
    when(subject) {
        condition1 [, condition2, ...] -> resultExpressionOrBlock
        conditionN -> result
        else -> fallback
    }
 - Commas group multiple conditions for one branch.
 - First matching branch wins; there is no fall‑through.
 - `else` is optional. If omitted and nothing matches, the result is `void`.
 ## Matching rules (conditions)
 Within `when(subject)`, each condition is evaluated against the already evaluated `subject`. Lyng supports:
 1) Equality match (default)
 - Any expression value can be used as a condition. It matches if it is equal to `subject`.
 - Equality relies on Lyng’s comparison (`compareTo(...) == 0`). For user types, implement comparison accordingly.
    when(x) {
        0 -> "zero"
        "EUR" -> "currency"
    }
    >>> void
 2) Type checks: `is` and `!is`
 - Check whether the subject is an instance of a class.
 - Works with built‑in classes and user classes.
    fun typeOf(x) {
        when(x) {
            is Real, is Int -> "number"
            is String -> "string"
            else -> "other"
        }
    }
    assertEquals("number", typeOf(5))
    assertEquals("string", typeOf("hi"))
    >>> void
 3) Containment checks: `in` and `!in`
 - `in container` matches if `container.contains(subject)` is true.
 - `!in container` matches if `contains(subject)` is false.
 - Any object that provides `contains(item)` can act as a container.
 Common containers:
 - Ranges (e.g., `'a'..'z'`, `1..10`, `1..<10`, `..5`, `5..`)
 - Lists, Sets, Arrays, Buffers
 - Strings (character or substring containment)
 Examples:
    when('e') {
        in 'a'..'c' -> "small"
        in 'a'..'z' -> "letter"
        else -> "other"
    }
    >>> "letter"
    when(5) {
        in [1,2,3,4,6] -> "no"
        in [7,0,9] -> "no"
        else -> "ok"
    }
    >>> "ok"
    when(5) {
        in [1,2,3,4,6] -> "no"
        in [7,0,9] -> "no"
        in [-1,5,11] -> "yes"
        else -> "no"
    }
    >>> "yes"
    when(5) {
        !in [1,2,3,4,6,5] -> "no"
        !in [7,0,9,5] -> "no"
        !in [-1,15,11] -> "ok"
        else -> "no"
    }
    >>> "ok"
    // String containment
    "foo" in "foobar"   // true (substring)
    'o' in "foobar"      // true (character)
    >>> true
 Notes on mixed String/Char ranges:
 - Prefer character ranges for characters: `'a'..'z'`.
 - `"a".."z"` is a String range and may not behave as you expect with `Char` subjects.
    assert( "more" in "a".."z")
    assert( 'x' !in "a".."z")  // Char vs String range: often not what you want
    assert( 'x' in 'a'..'z')     // OK
    assert( "x" !in 'a'..'z')   // String in Char range: likely not intended
    >>> void
 ## Grouping multiple conditions with commas
 You can group values and/or `is`/`in` checks for a single result:
    fun classify(x) {
        when(x) {
            "42", 42 -> "answer"
            is Real, is Int -> "number"
            in ['@', '#', '^'] -> "punct1"
            in "*&.," -> "punct2"
            else -> "unknown"
        }
    }
    assertEquals("number", classify(π/2))
    assertEquals("answer", classify(42))
    assertEquals("answer", classify("42"))
    >>> void
 ## Return value and blocks
 - `when` returns the value of the matched branch result expression/block.
 - Branch bodies can be single expressions or blocks `{ ... }`.
 - If a matched branch produces `void` (e.g., only prints), the `when` result is `void`.
    val res = when(2) {
        1 -> 10
        2 -> { println("two"); 20 }
        else -> 0
    }
    assertEquals(20, res)
    >>> void
 ## Else branch
 - Optional but recommended when non‑exhaustive.
 - If omitted and nothing matches, `when` result is `void` (see r3 in the Quick examples).
 - Only one `else` is allowed.
 ## Subject‑less `when`
 The Kotlin‑style subject‑less form `when { condition -> ... }` is not implemented yet in Lyng. Use `if/else` chains or structure your checks around a subject with `when(subject) { ... }`.
 ## Extending `when` for your own types
 ### Equality matches
 - Equality checks in `when(subject)` use Lyng comparison (`compareTo` semantics under the hood). For your own Lyng classes, implement comparison appropriately so that `subject == value` works as intended.
 ### `in` / `!in` containment
 - Provide a `contains(item)` method on your class to participate in `in` conditions.
 - Example: a custom `Box` that contains one specific item:
    class Box(val item)
    fun Box.contains(x) { x == item }
    val b = Box(10)
    when(10) { in b -> "hit" }
    >>> "hit"
 Any built‑in collection (`List`, `Set`, `Array`), `Range`, `Buffer`, and other containers already implement `contains`.
 ### Type checks (`is` / `!is`)
 - Every value has a `::class` that yields its Lyng class object, e.g. `[1,2,3]::class` → `List`.
 - `is ClassName` in `when` uses Lyng’s class hierarchy. Ensure your class is declared and can be referenced by name.
    []::class == List
    >>> true
    fun f(x) { when(x) { is List -> "list" else -> "other" } }
    assertEquals("list", f([1]))
    >>> void
 ## Kotlin‑backed classes (embedding)
 When embedding Lyng in Kotlin, you may expose Kotlin‑backed objects and classes. Interactions inside `when` work as follows:
 - `is` checks use the Lyng class object you expose for your Kotlin type. Ensure your exposed class participates in the Lyng class hierarchy (see Embedding docs).
 - `in` checks call `contains(subject)`; if your Kotlin‑backed object wants to support `in`, expose a `contains(item)` method (mapped to Lyng) or implement the corresponding Lyng container wrapper.
 - Equality follows Lyng comparison rules. Ensure your Kotlin‑backed object’s Lyng adapter implements equality/compare correctly.
 For details on exposing classes/methods from Kotlin, see: [Embedding Lyng in your Kotlin project](embedding.md).
 ## Gotchas and tips
 - First match wins; there is no fall‑through. Order branches carefully.
 - Group related conditions with commas for readability and performance (a single branch evaluation).
 - Prefer character ranges for character tests; avoid mixing `String` and `Char` ranges.
 - If you rely on `in`, check that your container implements `contains(item)`.
 - Remember: `when` is an expression — you can assign its result to a variable or return it from a function.
 ## Additional examples
    fun label(ch) {
        when(ch) {
            in '0'..'9' -> "digit"
            in 'a'..'z', in 'A'..'Z' -> "letter"
            '$' -> "dollar"
            else -> "other"
        }
    }
    assertEquals("digit", label('3'))
    assertEquals("dollar", label('$'))
    >>> void
    fun normalize(x) {
        when(x) {
            is Int -> x
            is Real -> x.round()
            else -> 0
        }
    }
    assertEquals(12, normalize(12))
    assertEquals(3,  normalize(2.6))
    >>> void
@@ -0,0 +1,68 @@
 Lyng TextMate grammar
 ======================
 This folder contains a TextMate grammar for the Lyng language so you can get syntax highlighting quickly in:
 - JetBrains IDEs (IntelliJ IDEA, Fleet, etc.) via “TextMate Bundles”
 - VS Code (via “Install from VSIX” or by adding as an extension folder)
 Files
 -----
 - `package.json` — VS Code–style wrapper that JetBrains IDEs can import as a TextMate bundle.
 - `syntaxes/lyng.tmLanguage.json` — the grammar. It highlights:
  - Line and block comments (`//`, `/* */`)
  - Shebang line at file start (`#!...`)
  - Strings: single and double quotes with escapes
  - Char literals `'x'` with escapes
  - Numbers: decimal with underscores and exponents, and hex (`0x...`)
  - Keywords (control and declarations), boolean operator words (`and`, `or`, `not`, `in`, `is`, `as`, `as?`)
  - Composite textual operators: `not in`, `not is`
  - Constants: `true`, `false`, `null`, `this`
  - Annotations: `@name` (Unicode identifiers supported)
  - Labels: `name:` (Unicode identifiers supported)
  - Declarations: highlights declared names in `fun|fn name`, `class|enum Name`, `val|var name`
  - Types: built-ins (`Int|Real|String|Bool|Char|Regex`) and Capitalized identifiers (heuristic)
  - Operators including ranges (`..`, `..<`, `...`), null-safe (`?.`, `?[`, `?(`, `?{`, `?:`, `??`), arrows (`->`, `=>`, `::`), match operators (`=~`, `!~`), bitwise, arithmetic, etc.
  - Shuttle operator `<=>`
  - Division operator `/` (note: Lyng has no regex literal syntax; `/` is always division)
  - Named arguments at call sites `name: value` (the `name` part is highlighted as `variable.parameter.named.lyng` and the `:` as punctuation). The rule is anchored to `(` or `,` and excludes `::` to avoid conflicts.
 Install in IntelliJ IDEA (and other JetBrains IDEs)
 ---------------------------------------------------
 1. Open Settings / Preferences → Editor → TextMate Bundles.
 2. Click “+” and select this folder `editors/lyng-textmate/` (the folder that contains `package.json`).
 3. Ensure `*.lyng` is associated with the Lyng grammar (IntelliJ usually picks this up from `fileTypes`).
 4. Optional: customize colors with Settings → Editor → Color Scheme → TextMate.
 Enable Markdown code-fence highlighting in IntelliJ
 --------------------------------------------------
 1. Settings / Preferences → Languages & Frameworks → Markdown → Code style → Code fences → Languages.
 2. Add mapping: language id `lyng` → “Lyng (TextMate)”.
 3. Now blocks like
   ```
   ```lyng
   // Lyng code here
   ```
   ```
   will be highlighted.
 Install in VS Code
 ------------------
 Fastest local install without packaging:
 1. Copy or symlink this folder somewhere stable (or keep it in your workspace).
 2. Use “Developer: Install Extension from Location…” (Insiders) or package with `vsce package` and install the resulting `.vsix`.
 3. VS Code will auto-associate `*.lyng` via this extension; if needed, check File Associations.
 Notes and limitations
 ---------------------
 - Type highlighting is heuristic (Capitalized identifiers). The IntelliJ plugin will use language semantics and avoid false positives.
 - If your language adds or changes tokens, please update patterns in `lyng.tmLanguage.json`. The Kotlin sources in `lynglib/src/commonMain/kotlin/net/sergeych/lyng/highlight/` are a good reference for token kinds.
 - Labels `name:` at statement level remain supported and are kept distinct from named call arguments by context. The grammar prefers named-argument matching when a `name:` appears right after `(` or `,`.
 Lyng specifics
 --------------
 - There are no regex literal tokens in Lyng at the moment; the slash character `/` is always treated as the division operator. The grammar intentionally does not define a `/.../` regex rule to avoid mis-highlighting lines like `a / b`.
 Contributing
 ------------
 Pull requests to refine patterns and add tests/samples are welcome. You can place test snippets in `sample_texts/` and visually verify.
@@ -0,0 +1,25 @@
 {
  "name": "lyng-textmate",
  "displayName": "Lyng",
  "description": "TextMate grammar for the Lyng language (for JetBrains IDEs via TextMate Bundles and VS Code).",
  "version": "0.0.3",
  "publisher": "lyng",
  "license": "Apache-2.0",
  "engines": { "vscode": "^1.0.0" },
  "contributes": {
    "languages": [
      {
        "id": "lyng",
        "aliases": ["Lyng", "lyng"],
        "extensions": [".lyng"]
      }
    ],
    "grammars": [
      {
        "language": "lyng",
        "scopeName": "source.lyng",
        "path": "./syntaxes/lyng.tmLanguage.json"
      }
    ]
  }
 }
@@ -0,0 +1,86 @@
 {
  "$schema": "https://raw.githubusercontent.com/martinring/tmlanguage/master/tmlanguage.json",
  "name": "Lyng",
  "scopeName": "source.lyng",
  "fileTypes": ["lyng"],
  "patterns": [
    { "include": "#shebang" },
    { "include": "#comments" },
    { "include": "#strings" },
    { "include": "#char" },
    { "include": "#numbers" },
    { "include": "#declarations" },
    { "include": "#keywords" },
    { "include": "#constants" },
    { "include": "#types" },
    { "include": "#mapLiterals" },
    { "include": "#namedArgs" },
    { "include": "#annotations" },
    { "include": "#labels" },
    { "include": "#directives" },
    { "include": "#operators" },
    { "include": "#punctuation" }
  ],
  "repository": {
    "shebang": { "patterns": [ { "name": "comment.line.shebang.lyng", "match": "^#!.*$" } ] },
    "comments": {
      "patterns": [
        { "name": "comment.line.double-slash.lyng", "match": "//.*$" },
        { "name": "comment.block.lyng", "begin": "/\\*", "end": "\\*/" }
      ]
    },
    "strings": {
      "patterns": [
        { "name": "string.quoted.double.lyng", "begin": "\"", "end": "\"", "patterns": [ { "match": "\\\\.", "name": "constant.character.escape.lyng" } ] },
        { "name": "string.quoted.single.lyng", "begin": "'", "end": "'", "patterns": [ { "match": "\\\\.", "name": "constant.character.escape.lyng" } ] }
      ]
    },
    "char": { "patterns": [ { "name": "constant.character.lyng", "match": "'(?:[^\\\\']|\\\\.)'" } ] },
    "numbers": {
      "patterns": [
        { "name": "constant.numeric.hex.lyng", "match": "0x[0-9A-Fa-f_]+" },
        { "name": "constant.numeric.decimal.lyng", "match": "(?<![A-Za-z_])(?:[0-9][0-9_]*)\\.(?:[0-9_]+)(?:[eE][+-]?[0-9_]+)?|(?<![A-Za-z_])(?:[0-9][0-9_]*)(?:[eE][+-]?[0-9_]+)?" }
      ]
    },
    "annotations": { "patterns": [ { "name": "entity.name.label.at.lyng", "match": "@[\\p{L}_][\\p{L}\\p{N}_]*:" }, { "name": "storage.modifier.annotation.lyng", "match": "@[\\p{L}_][\\p{L}\\p{N}_]*" } ] },
    "mapLiterals": {
      "patterns": [
        {
          "name": "meta.map.entry.lyng",
          "match": "(?:(?<=\\{|,))\\s*(\"[^\"]*\"|[\\p{L}_][\\p{L}\\p{N}_]*)\\s*(:)(?!:)",
          "captures": {
            "1": { "name": "variable.other.property.key.lyng" },
            "2": { "name": "punctuation.separator.colon.lyng" }
          }
        },
        {
          "name": "meta.map.spread.lyng",
          "match": "(?:(?<=\\{|,))\\s*(\\.\\.\\.)",
          "captures": {
            "1": { "name": "keyword.operator.spread.lyng" }
          }
        }
      ]
    },
    "namedArgs": {
      "patterns": [
        {
          "name": "meta.argument.named.lyng",
          "match": "(?:(?<=\\()|(?<=,))\\s*([\\p{L}_][\\p{L}\\p{N}_]*)\\s*(:)(?!:)",
          "captures": {
            "1": { "name": "variable.parameter.named.lyng" },
            "2": { "name": "punctuation.separator.colon.lyng" }
          }
        }
      ]
    },
    "labels": { "patterns": [ { "name": "entity.name.label.lyng", "match": "[\\p{L}_][\\p{L}\\p{N}_]*:" } ] },
    "directives": { "patterns": [ { "name": "meta.directive.lyng", "match": "^\\s*#[_A-Za-z][_A-Za-z0-9]*" } ] },
    "declarations": { "patterns": [ { "name": "meta.function.declaration.lyng", "match": "\\b(fun|fn)\\s+(?:([\\p{L}_][\\p{L}\\p{N}_]*)\\.)?([\\p{L}_][\\p{L}\\p{N}_]*)", "captures": { "1": { "name": "keyword.declaration.lyng" }, "2": { "name": "entity.name.type.lyng" }, "3": { "name": "entity.name.function.lyng" } } }, { "name": "meta.type.declaration.lyng", "match": "\\b(?:class|enum)\\s+([\\p{L}_][\\p{L}\\p{N}_]*)", "captures": { "1": { "name": "entity.name.type.lyng" } } }, { "name": "meta.variable.declaration.lyng", "match": "\\b(val|var)\\s+(?:([\\p{L}_][\\p{L}\\p{N}_]*)\\.)?([\\p{L}_][\\p{L}\\p{N}_]*)", "captures": { "1": { "name": "keyword.declaration.lyng" }, "2": { "name": "entity.name.type.lyng" }, "3": { "name": "variable.other.declaration.lyng" } } } ] },
    "keywords": { "patterns": [ { "name": "keyword.control.lyng", "match": "\\b(?:if|else|when|while|do|for|try|catch|finally|throw|return|break|continue)\\b" }, { "name": "keyword.declaration.lyng", "match": "\\b(?:fun|fn|class|enum|val|var|import|package|constructor|property|open|extern|private|protected|static|get|set)\\b" }, { "name": "keyword.operator.word.lyng", "match": "\\bnot\\s+(?:in|is)\\b" }, { "name": "keyword.operator.word.lyng", "match": "\\b(?:and|or|not|in|is|as|as\\?)\\b" } ] },
    "constants": { "patterns": [ { "name": "constant.language.lyng", "match": "(?:\\b(?:true|false|null|this)\\b|π)" } ] },
    "types": { "patterns": [ { "name": "storage.type.lyng", "match": "\\b(?:Int|Real|String|Bool|Char|Regex)\\b" }, { "name": "entity.name.type.lyng", "match": "\\b[A-Z][A-Za-z0-9_]*\\b(?!\\s*\\()" } ] },
    "operators": { "patterns": [ { "name": "keyword.operator.comparison.lyng", "match": "===|!==|==|!=|<=|>=|<|>" }, { "name": "keyword.operator.shuttle.lyng", "match": "<=>" }, { "name": "keyword.operator.arrow.lyng", "match": "=>|->|::" }, { "name": "keyword.operator.range.lyng", "match": "\\.\\.\\.|\\.\\.<|\\.\\." }, { "name": "keyword.operator.nullsafe.lyng", "match": "\\?\\.|\\?\\[|\\?\\(|\\?\\{|\\?:|\\?\\?" }, { "name": "keyword.operator.assignment.lyng", "match": "(?:\\+=|-=|\\*=|/=|%=|=)" }, { "name": "keyword.operator.logical.lyng", "match": "&&|\\|\\|" }, { "name": "keyword.operator.bitwise.lyng", "match": "<<|>>|&|\\||\\^|~" }, { "name": "keyword.operator.match.lyng", "match": "=~|!~" }, { "name": "keyword.operator.arithmetic.lyng", "match": "\\+\\+|--|[+\\-*/%]" }, { "name": "keyword.operator.other.lyng", "match": "[!?]" } ] },
    "punctuation": { "patterns": [ { "name": "punctuation.separator.comma.lyng", "match": "," }, { "name": "punctuation.terminator.statement.lyng", "match": ";" }, { "name": "punctuation.section.block.begin.lyng", "match": "[(]{1}|[{]{1}|\\[" }, { "name": "punctuation.section.block.end.lyng", "match": "[)]{1}|[}]{1}|\\]" }, { "name": "punctuation.accessor.dot.lyng", "match": "\\." }, { "name": "punctuation.separator.colon.lyng", "match": ":" } ] }
  }
 }
@@ -29,3 +29,12 @@ android.nonTransitiveRClass=true
 # other
 kotlin.native.cacheKind.linuxX64=none
 # Workaround: Ensure Gradle uses a JDK with `jlink` available for AGP's JDK image transform.
 # On this environment, the system JDK 21 installation lacks `jlink`, causing
 # :lynglib:androidJdkImage to fail. Point Gradle to a JDK that includes `jlink`.
 # This affects only the JDK Gradle runs with; Kotlin/JVM target remains compatible.
 #org.gradle.java.home=/home/sergeych/.jdks/corretto-21.0.9
 android.experimental.lint.migrateToK2=false
 android.lint.useK2Uast=false
 kotlin.mpp.applyDefaultHierarchyTemplate=true
@@ -1,11 +1,11 @@
 [versions]
 agp = "8.5.2"
 clikt = "5.0.3"
-kotlin = "2.2.20"
+kotlin = "2.3.0"
 android-minSdk = "24"
 android-compileSdk = "34"
 kotlinx-coroutines = "1.10.2"
-mp_bintools = "0.1.12"
+mp_bintools = "0.3.2"
 firebaseCrashlyticsBuildtools = "3.0.3"
 okioVersion = "3.10.2"
 compiler = "3.2.0-alpha11"
@@ -20,6 +20,7 @@ mp_bintools = { module = "net.sergeych:mp_bintools", version.ref = "mp_bintools"
 firebase-crashlytics-buildtools = { group = "com.google.firebase", name = "firebase-crashlytics-buildtools", version.ref = "firebaseCrashlyticsBuildtools" }
 okio = { module = "com.squareup.okio:okio", version.ref = "okioVersion" }
 okio-fakefilesystem = { module = "com.squareup.okio:okio-fakefilesystem", version.ref = "okioVersion" }
 okio-nodefilesystem = { module = "com.squareup.okio:okio-nodefilesystem", version.ref = "okioVersion" }
 compiler = { group = "androidx.databinding", name = "compiler", version.ref = "compiler" }
 [plugins]
@@ -0,0 +1,32 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
  - Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
  -
  - Licensed under the Apache License, Version 2.0 (the "License");
  - you may not use this file except in compliance with the License.
  - You may obtain a copy of the License at
  -
  -     http://www.apache.org/licenses/LICENSE-2.0
  -
  - Unless required by applicable law or agreed to in writing, software
  - distributed under the License is distributed on an "AS IS" BASIS,
  - WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  - See the License for the specific language governing permissions and
  - limitations under the License.
  -
  -->
 <svg width="16" height="16" viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg" aria-labelledby="title" role="img">
  <title>Lyng File Icon (temporary λ)</title>
  <defs>
    <style>
      .g { fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
    </style>
  </defs>
  <!-- Keep shapes crisp on small canvas; slight inset to avoid clipping -->
  <g transform="translate(0.5,0.5)">
    <!-- Stylized lambda fitted to 14x14 -->
    <path class="g" d="M4.5 2.5 L7 9.5 C7.6 11.2 9.0 12.5 11.0 12.5 L14.5 12.5"/>
    <path class="g" d="M7 9.5 L2.5 14.5"/>
  </g>
 </svg>
@@ -0,0 +1,33 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
  - Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
  -
  - Licensed under the Apache License, Version 2.0 (the "License");
  - you may not use this file except in compliance with the License.
  - You may obtain a copy of the License at
  -
  -     http://www.apache.org/licenses/LICENSE-2.0
  -
  - Unless required by applicable law or agreed to in writing, software
  - distributed under the License is distributed on an "AS IS" BASIS,
  - WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  - See the License for the specific language governing permissions and
  - limitations under the License.
  -
  -->
 <svg width="40" height="40" viewBox="0 0 40 40" xmlns="http://www.w3.org/2000/svg" aria-labelledby="title" role="img">
  <title>Lyng Plugin Icon (temporary λ)</title>
  <defs>
    <!-- Monochrome, theme-friendly -->
    <style>
      .glyph { fill: none; stroke: currentColor; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
    </style>
  </defs>
  <!-- Safe inset to avoid edge clipping in 40x40 canvas -->
  <g transform="translate(2,2)">
    <!-- Stylized lambda: rising stem + curved tail -->
    <path class="glyph" d="M12 6 L18 22 C19.2 25.5 22.2 28 26 28 L32 28"/>
    <path class="glyph" d="M18 22 L8 34"/>
  </g>
 </svg>
@@ -0,0 +1,88 @@
 /*
 * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 plugins {
    kotlin("jvm")
    id("org.jetbrains.intellij") version "1.17.3"
 }
 group = "net.sergeych.lyng"
 version = "0.0.5-SNAPSHOT"
 kotlin {
    jvmToolchain(17)
 }
 repositories {
    mavenCentral()
    // Use the same repositories as the rest of the project so plugin runtime deps resolve
    maven("https://maven.universablockchain.com/")
    maven("https://gitea.sergeych.net/api/packages/SergeychWorks/maven")
    mavenLocal()
 }
 dependencies {
    implementation(project(":lynglib"))
    // Include lyngio so Quick Docs can reflectively load fs docs registrar (FsBuiltinDocs)
    implementation(project(":lyngio"))
    // Rich Markdown renderer for Quick Docs
    implementation("com.vladsch.flexmark:flexmark-all:0.64.8")
    // Tests for IntelliJ Platform fixtures rely on JUnit 3/4 API (junit.framework.TestCase)
    // Add JUnit 4 which contains the JUnit 3 compatibility classes used by BasePlatformTestCase/UsefulTestCase
    testImplementation("junit:junit:4.13.2")
 }
 intellij {
    type.set("IC")
    // Build against a modern baseline. Install range is controlled by since/until below.
    version.set("2024.3.1")
    // We manage <idea-version> ourselves in plugin.xml to keep it open-ended (no upper cap)
    updateSinceUntilBuild.set(false)
    // Include only available bundled plugins for this IDE build
    plugins.set(listOf(
        "com.intellij.java",
        // Provide Grazie API on compile classpath (bundled in 2024.3+, but add here for compilation)
        "tanvd.grazi"
        // Do not list com.intellij.spellchecker here: it is expected to be bundled with the IDE.
        // Listing it causes Gradle to search for a separate plugin artifact and fail on IC 2024.3.
    ))
 }
 tasks {
    patchPluginXml {
        // Keep version and other metadata patched by Gradle, but since/until are controlled in plugin.xml.
        // (intellij.updateSinceUntilBuild=false prevents Gradle from injecting an until-build cap)
    }
    // Build an installable plugin zip and copy it to $PROJECT_ROOT/distributables
    // Usage: ./gradlew :lyng-idea:buildInstallablePlugin
    // It depends on buildPlugin and overwrites any existing file with the same name
    register<Copy>("buildInstallablePlugin") {
        dependsOn("buildPlugin")
        // The Gradle IntelliJ Plugin produces: build/distributions/<project.name>-<version>.zip
        val zipName = "${project.name}-${project.version}.zip"
        val sourceZip = layout.buildDirectory.file("distributions/$zipName")
        from(sourceZip)
        into(rootProject.layout.projectDirectory.dir("distributables"))
        // Overwrite if a file with the same name exists
        duplicatesStrategy = DuplicatesStrategy.INCLUDE
    }
 }
@@ -0,0 +1,27 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea
 import com.intellij.openapi.fileTypes.LanguageFileType
 import javax.swing.Icon
 object LyngFileType : LanguageFileType(LyngLanguage) {
    override fun getName(): String = "Lyng"
    override fun getDescription(): String = "Lyng language file"
    override fun getDefaultExtension(): String = "lyng"
    override fun getIcon(): Icon? = LyngIcons.FILE
 }
@@ -0,0 +1,24 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea
 import com.intellij.openapi.util.IconLoader
 import javax.swing.Icon
 object LyngIcons {
    val FILE: Icon = IconLoader.getIcon("/icons/lyng_file.svg", LyngIcons::class.java)
 }
@@ -0,0 +1,21 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea
 import com.intellij.lang.Language
 object LyngLanguage : Language("Lyng")
@@ -0,0 +1,393 @@
 /*
 * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.annotators
 import com.intellij.lang.annotation.AnnotationHolder
 import com.intellij.lang.annotation.ExternalAnnotator
 import com.intellij.lang.annotation.HighlightSeverity
 import com.intellij.openapi.editor.Document
 import com.intellij.openapi.progress.ProgressManager
 import com.intellij.openapi.util.Key
 import com.intellij.openapi.util.TextRange
 import com.intellij.psi.PsiFile
 import kotlinx.coroutines.runBlocking
 import net.sergeych.lyng.Compiler
 import net.sergeych.lyng.ScriptError
 import net.sergeych.lyng.Source
 import net.sergeych.lyng.binding.Binder
 import net.sergeych.lyng.binding.SymbolKind
 import net.sergeych.lyng.highlight.HighlightKind
 import net.sergeych.lyng.highlight.SimpleLyngHighlighter
 import net.sergeych.lyng.highlight.offsetOf
 import net.sergeych.lyng.idea.highlight.LyngHighlighterColors
 import net.sergeych.lyng.idea.util.IdeLenientImportProvider
 import net.sergeych.lyng.miniast.*
 /**
 * ExternalAnnotator that runs Lyng MiniAst on the document text in background
 * and applies semantic highlighting comparable with the web highlighter.
 */
 class LyngExternalAnnotator : ExternalAnnotator<LyngExternalAnnotator.Input, LyngExternalAnnotator.Result>() {
    data class Input(val text: String, val modStamp: Long, val previousSpans: List<Span>?)
    data class Span(val start: Int, val end: Int, val key: com.intellij.openapi.editor.colors.TextAttributesKey)
    data class Error(val start: Int, val end: Int, val message: String)
    data class Result(val modStamp: Long, val spans: List<Span>, val error: Error? = null,
                      val spellIdentifiers: List<IntRange> = emptyList(),
                      val spellComments: List<IntRange> = emptyList(),
                      val spellStrings: List<IntRange> = emptyList())
    override fun collectInformation(file: PsiFile): Input? {
        val doc: Document = file.viewProvider.document ?: return null
        val cached = file.getUserData(CACHE_KEY)
        // Fast fix (1): reuse cached spans only if they were computed for the same modification stamp
        val prev = if (cached != null && cached.modStamp == doc.modificationStamp) cached.spans else null
        return Input(doc.text, doc.modificationStamp, prev)
    }
    override fun doAnnotate(collectedInfo: Input?): Result? {
        if (collectedInfo == null) return null
        ProgressManager.checkCanceled()
        val text = collectedInfo.text
        // Build Mini-AST using the same mechanism as web highlighter
        val sink = MiniAstBuilder()
        val source = Source("<ide>", text)
        try {
            // Call suspend API from blocking context
            val provider = IdeLenientImportProvider.create()
            runBlocking { Compiler.compileWithMini(source, provider, sink) }
        } catch (e: Throwable) {
            if (e is com.intellij.openapi.progress.ProcessCanceledException) throw e
            // On script parse error: keep previous spans and report the error location
            if (e is ScriptError) {
                val off = try { source.offsetOf(e.pos) } catch (_: Throwable) { -1 }
                val start0 = off.coerceIn(0, text.length.coerceAtLeast(0))
                val (start, end) = expandErrorRange(text, start0)
                // Fast fix (5): clear cached highlighting after the error start position
                val trimmed = collectedInfo.previousSpans?.filter { it.end <= start } ?: emptyList()
                return Result(
                    collectedInfo.modStamp,
                    trimmed,
                    Error(start, end, e.errorMessage)
                )
            }
            // Other failures: keep previous spans without error
            return Result(collectedInfo.modStamp, collectedInfo.previousSpans ?: emptyList(), null)
        }
        ProgressManager.checkCanceled()
        val mini = sink.build() ?: return Result(collectedInfo.modStamp, collectedInfo.previousSpans ?: emptyList())
        val out = ArrayList<Span>(256)
        fun putRange(start: Int, end: Int, key: com.intellij.openapi.editor.colors.TextAttributesKey) {
            if (start in 0..end && end <= text.length && start < end) out += Span(start, end, key)
        }
        fun putName(startPos: net.sergeych.lyng.Pos, name: String, key: com.intellij.openapi.editor.colors.TextAttributesKey) {
            val s = source.offsetOf(startPos)
            putRange(s, (s + name.length).coerceAtMost(text.length), key)
        }
        fun putMiniRange(r: MiniRange, key: com.intellij.openapi.editor.colors.TextAttributesKey) {
            val s = source.offsetOf(r.start)
            val e = source.offsetOf(r.end)
            putRange(s, e, key)
        }
        // Declarations
        for (d in mini.declarations) {
            when (d) {
                is MiniFunDecl -> putName(d.nameStart, d.name, LyngHighlighterColors.FUNCTION_DECLARATION)
                is MiniClassDecl -> putName(d.nameStart, d.name, LyngHighlighterColors.TYPE)
                is MiniValDecl -> putName(
                    d.nameStart,
                    d.name,
                    if (d.mutable) LyngHighlighterColors.VARIABLE else LyngHighlighterColors.VALUE
                )
                is MiniEnumDecl -> putName(d.nameStart, d.name, LyngHighlighterColors.TYPE)
            }
        }
        // Imports: each segment as namespace/path
        for (imp in mini.imports) {
            for (seg in imp.segments) putMiniRange(seg.range, LyngHighlighterColors.NAMESPACE)
        }
        // Parameters
        for (fn in mini.declarations.filterIsInstance<MiniFunDecl>()) {
            for (p in fn.params) putName(p.nameStart, p.name, LyngHighlighterColors.PARAMETER)
        }
        // Type name segments (including generics base & args)
        fun addTypeSegments(t: MiniTypeRef?) {
            when (t) {
                is MiniTypeName -> t.segments.forEach { seg ->
                    val s = source.offsetOf(seg.range.start)
                    putRange(s, (s + seg.name.length).coerceAtMost(text.length), LyngHighlighterColors.TYPE)
                }
                is MiniGenericType -> {
                    addTypeSegments(t.base)
                    t.args.forEach { addTypeSegments(it) }
                }
                is MiniFunctionType -> {
                    t.receiver?.let { addTypeSegments(it) }
                    t.params.forEach { addTypeSegments(it) }
                    addTypeSegments(t.returnType)
                }
                is MiniTypeVar -> { /* name is in range; could be highlighted as TYPE as well */
                    putMiniRange(t.range, LyngHighlighterColors.TYPE)
                }
                null -> {}
            }
        }
        for (d in mini.declarations) {
            when (d) {
                is MiniFunDecl -> {
                    addTypeSegments(d.returnType)
                    d.params.forEach { addTypeSegments(it.type) }
                    addTypeSegments(d.receiver)
                }
                is MiniValDecl -> {
                    addTypeSegments(d.type)
                    addTypeSegments(d.receiver)
                }
                is MiniClassDecl -> {
                    d.ctorFields.forEach { addTypeSegments(it.type) }
                    d.classFields.forEach { addTypeSegments(it.type) }
                }
                is MiniEnumDecl -> {}
            }
        }
        ProgressManager.checkCanceled()
        // Semantic usages via Binder (best-effort)
        try {
            val binding = Binder.bind(text, mini)
            // Map declaration ranges to avoid duplicating them as usages
            val declKeys = HashSet<Pair<Int, Int>>(binding.symbols.size * 2)
            for (sym in binding.symbols) declKeys += (sym.declStart to sym.declEnd)
            fun keyForKind(k: SymbolKind) = when (k) {
                SymbolKind.Function -> LyngHighlighterColors.FUNCTION
                SymbolKind.Class, SymbolKind.Enum -> LyngHighlighterColors.TYPE
                SymbolKind.Parameter -> LyngHighlighterColors.PARAMETER
                SymbolKind.Value -> LyngHighlighterColors.VALUE
                SymbolKind.Variable -> LyngHighlighterColors.VARIABLE
            }
            // Track covered ranges to not override later heuristics
            val covered = HashSet<Pair<Int, Int>>()
            for (ref in binding.references) {
                val key = ref.start to ref.end
                if (declKeys.contains(key)) continue
                val sym = binding.symbols.firstOrNull { it.id == ref.symbolId } ?: continue
                val color = keyForKind(sym.kind)
                putRange(ref.start, ref.end, color)
                covered += key
            }
            // Heuristics on top of binder: function call-sites and simple name-based roles
            ProgressManager.checkCanceled()
            val tokens = try { SimpleLyngHighlighter().highlight(text) } catch (_: Throwable) { emptyList() }
            fun isFollowedByParenOrBlock(rangeEnd: Int): Boolean {
                var i = rangeEnd
                while (i < text.length) {
                    val ch = text[i]
                    if (ch == ' ' || ch == '\t' || ch == '\r' || ch == '\n') { i++; continue }
                    return ch == '(' || ch == '{'
                }
                return false
            }
            // Build simple name -> role map for top-level vals/vars and parameters
            val nameRole = HashMap<String, com.intellij.openapi.editor.colors.TextAttributesKey>(8)
            for (d in mini.declarations) when (d) {
                is MiniValDecl -> nameRole[d.name] = if (d.mutable) LyngHighlighterColors.VARIABLE else LyngHighlighterColors.VALUE
                is MiniFunDecl -> d.params.forEach { p -> nameRole[p.name] = LyngHighlighterColors.PARAMETER }
                else -> {}
            }
            for (s in tokens) if (s.kind == HighlightKind.Identifier) {
                val start = s.range.start
                val end = s.range.endExclusive
                val key = start to end
                if (key in covered || key in declKeys) continue
                // Call-site detection first so it wins over var/param role
                if (isFollowedByParenOrBlock(end)) {
                    putRange(start, end, LyngHighlighterColors.FUNCTION)
                    covered += key
                    continue
                }
                // Simple role by known names
                val ident = try { text.substring(start, end) } catch (_: Throwable) { null }
                if (ident != null) {
                    val roleKey = nameRole[ident]
                    if (roleKey != null) {
                        putRange(start, end, roleKey)
                        covered += key
                    }
                }
            }
        } catch (e: Throwable) {
            // Must rethrow cancellation; otherwise ignore binder failures (best-effort)
            if (e is com.intellij.openapi.progress.ProcessCanceledException) throw e
        }
        // Add annotation coloring using token highlighter (treat @Label as annotation)
        run {
            val tokens = try { SimpleLyngHighlighter().highlight(text) } catch (_: Throwable) { emptyList() }
            for (s in tokens) if (s.kind == HighlightKind.Label) {
                val start = s.range.start
                val end = s.range.endExclusive
                if (start in 0..end && end <= text.length && start < end) {
                    val lexeme = try { text.substring(start, end) } catch (_: Throwable) { null }
                    if (lexeme != null && lexeme.startsWith("@")) {
                        putRange(start, end, LyngHighlighterColors.ANNOTATION)
                    }
                }
            }
        }
        // Map Enum constants from token highlighter to IDEA enum constant color
        run {
            val tokens = try { SimpleLyngHighlighter().highlight(text) } catch (_: Throwable) { emptyList() }
            for (s in tokens) if (s.kind == HighlightKind.EnumConstant) {
                val start = s.range.start
                val end = s.range.endExclusive
                if (start in 0..end && end <= text.length && start < end) {
                    putRange(start, end, LyngHighlighterColors.ENUM_CONSTANT)
                }
            }
        }
        // Build spell index payload: identifiers from symbols + references; comments/strings from simple highlighter
        val idRanges = mutableSetOf<IntRange>()
        try {
            val binding = Binder.bind(text, mini)
            for (sym in binding.symbols) {
                val s = sym.declStart; val e = sym.declEnd
                if (s in 0..e && e <= text.length && s < e) idRanges += (s until e)
            }
            for (ref in binding.references) {
                val s = ref.start; val e = ref.end
                if (s in 0..e && e <= text.length && s < e) idRanges += (s until e)
            }
        } catch (_: Throwable) {
            // Best-effort; no identifiers if binder fails
        }
        val tokens = try { SimpleLyngHighlighter().highlight(text) } catch (_: Throwable) { emptyList() }
        val commentRanges = tokens.filter { it.kind == HighlightKind.Comment }.map { it.range.start until it.range.endExclusive }
        val stringRanges = tokens.filter { it.kind == HighlightKind.String }.map { it.range.start until it.range.endExclusive }
        return Result(collectedInfo.modStamp, out, null,
            spellIdentifiers = idRanges.toList(),
            spellComments = commentRanges,
            spellStrings = stringRanges)
    }
    override fun apply(file: PsiFile, annotationResult: Result?, holder: AnnotationHolder) {
        if (annotationResult == null) return
        // Skip if cache is up-to-date
        val doc = file.viewProvider.document
        val currentStamp = doc?.modificationStamp
        val cached = file.getUserData(CACHE_KEY)
        val result = if (cached != null && currentStamp != null && cached.modStamp == currentStamp) cached else annotationResult
        file.putUserData(CACHE_KEY, result)
        // Store spell index for spell/grammar engines to consume (suspend until ready)
        val ids = result.spellIdentifiers.map { TextRange(it.first, it.last + 1) }
        val coms = result.spellComments.map { TextRange(it.first, it.last + 1) }
        val strs = result.spellStrings.map { TextRange(it.first, it.last + 1) }
        net.sergeych.lyng.idea.spell.LyngSpellIndex.store(file,
            net.sergeych.lyng.idea.spell.LyngSpellIndex.Data(
                modStamp = result.modStamp,
                identifiers = ids,
                comments = coms,
                strings = strs
            )
        )
        // Optional diagnostic overlay: visualize the ranges we will feed to spellcheckers
        val settings = net.sergeych.lyng.idea.settings.LyngFormatterSettings.getInstance(file.project)
        if (settings.debugShowSpellFeed) {
            fun paint(r: TextRange, label: String) {
                holder.newAnnotation(HighlightSeverity.WEAK_WARNING, "spell-feed: $label")
                    .range(r)
                    .create()
            }
            ids.forEach { paint(it, "id") }
            coms.forEach { paint(it, "comment") }
            if (settings.spellCheckStringLiterals) strs.forEach { paint(it, "string") }
        }
        for (s in result.spans) {
            holder.newSilentAnnotation(HighlightSeverity.INFORMATION)
                .range(TextRange(s.start, s.end))
                .textAttributes(s.key)
                .create()
        }
        // Show syntax error if present
        val err = result.error
        if (err != null) {
            val start = err.start.coerceIn(0, (doc?.textLength ?: 0))
            val end = err.end.coerceIn(start, (doc?.textLength ?: start))
            if (end > start) {
                holder.newAnnotation(HighlightSeverity.ERROR, err.message)
                    .range(TextRange(start, end))
                    .create()
            }
        }
    }
    companion object {
        private val CACHE_KEY: Key<Result> = Key.create("LYNG_SEMANTIC_CACHE")
    }
    /**
     * Make the error highlight a bit wider than a single character so it is easier to see and click.
     * Strategy:
     *  - If the offset points inside an identifier-like token (letters/digits/underscore), expand to the full token.
     *  - Otherwise select a small range starting at the offset with a minimum width, but not crossing the line end.
     */
    private fun expandErrorRange(text: String, rawStart: Int): Pair<Int, Int> {
        if (text.isEmpty()) return 0 to 0
        val len = text.length
        val start = rawStart.coerceIn(0, len)
        fun isWord(ch: Char) = ch == '_' || ch.isLetterOrDigit()
        if (start < len && isWord(text[start])) {
            var s = start
            var e = start
            while (s > 0 && isWord(text[s - 1])) s--
            while (e < len && isWord(text[e])) e++
            return s to e
        }
        // Not inside a word: select a short, visible range up to EOL
        val lineEnd = text.indexOf('\n', start).let { if (it == -1) len else it }
        val minWidth = 4
        val end = (start + minWidth).coerceAtMost(lineEnd).coerceAtLeast((start + 1).coerceAtMost(lineEnd))
        return start to end
    }
 }
@@ -0,0 +1,27 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.comment
 import com.intellij.lang.Commenter
 class LyngCommenter : Commenter {
    override fun getLineCommentPrefix(): String = "//"
    override fun getBlockCommentPrefix(): String = "/*"
    override fun getBlockCommentSuffix(): String = "*/"
    override fun getCommentedBlockCommentPrefix(): String? = null
    override fun getCommentedBlockCommentSuffix(): String? = null
 }
@@ -0,0 +1,597 @@
 /*
 * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 /*
 * Lightweight BASIC completion for Lyng, MVP version.
 * Uses MiniAst (best-effort) + BuiltinDocRegistry to suggest symbols.
 */
 package net.sergeych.lyng.idea.completion
 import com.intellij.codeInsight.completion.*
 import com.intellij.codeInsight.lookup.LookupElementBuilder
 import com.intellij.icons.AllIcons
 import com.intellij.openapi.diagnostic.Logger
 import com.intellij.openapi.editor.Document
 import com.intellij.patterns.PlatformPatterns
 import com.intellij.psi.PsiFile
 import com.intellij.util.ProcessingContext
 import kotlinx.coroutines.runBlocking
 import net.sergeych.lyng.highlight.offsetOf
 import net.sergeych.lyng.idea.LyngLanguage
 import net.sergeych.lyng.idea.highlight.LyngTokenTypes
 import net.sergeych.lyng.idea.settings.LyngFormatterSettings
 import net.sergeych.lyng.idea.util.DocsBootstrap
 import net.sergeych.lyng.idea.util.LyngAstManager
 import net.sergeych.lyng.idea.util.TextCtx
 import net.sergeych.lyng.miniast.*
 class LyngCompletionContributor : CompletionContributor() {
    init {
        extend(
            CompletionType.BASIC,
            PlatformPatterns.psiElement().withLanguage(LyngLanguage),
            Provider
        )
    }
    private object Provider : CompletionProvider<CompletionParameters>() {
        private val log = Logger.getInstance(LyngCompletionContributor::class.java)
        private const val DEBUG_COMPLETION = false
        override fun addCompletions(
            parameters: CompletionParameters,
            context: ProcessingContext,
            result: CompletionResultSet
        ) {
            // Ensure external/bundled docs are registered (e.g., lyng.io.fs with Path)
            DocsBootstrap.ensure()
            // Ensure stdlib Obj*-defined docs (e.g., String methods via ObjString.addFnDoc) are initialized
            StdlibDocsBootstrap.ensure()
            val file: PsiFile = parameters.originalFile
            if (file.language != LyngLanguage) return
            // Disable completion inside comments
            val pos = parameters.position
            val et = pos.node.elementType
            if (et == LyngTokenTypes.LINE_COMMENT || et == LyngTokenTypes.BLOCK_COMMENT) return
            // Feature toggle: allow turning completion off from settings
            val settings = LyngFormatterSettings.getInstance(file.project)
            if (!settings.enableLyngCompletionExperimental) return
            val document: Document = file.viewProvider.document ?: return
            val text = document.text
            val caret = parameters.offset.coerceIn(0, text.length)
            val prefix = TextCtx.prefixAt(text, caret)
            val withPrefix = result.withPrefixMatcher(prefix).caseInsensitive()
            // Emission with cap
            val cap = 200
            var added = 0
            val emit: (com.intellij.codeInsight.lookup.LookupElement) -> Unit = { le ->
                if (added < cap) {
                    withPrefix.addElement(le)
                    added++
                }
            }
            // Determine if we are in member context (dot before caret or before word start)
            val wordRange = TextCtx.wordRangeAt(text, caret)
            val memberDotPos = (wordRange?.let { TextCtx.findDotLeft(text, it.startOffset) })
                ?: TextCtx.findDotLeft(text, caret)
            if (DEBUG_COMPLETION) {
                log.info("[LYNG_DEBUG] Completion: caret=$caret prefix='${prefix}' memberDotPos=${memberDotPos} file='${file.name}'")
            }
            // Build MiniAst (cached) for both global and member contexts to enable local class/val inference
            val mini = LyngAstManager.getMiniAst(file)
            val binding = LyngAstManager.getBinding(file)
            // Delegate computation to the shared engine to keep behavior in sync with tests
            val engineItems = try {
                runBlocking { CompletionEngineLight.completeSuspend(text, caret) }
            } catch (t: Throwable) {
                if (DEBUG_COMPLETION) log.warn("[LYNG_DEBUG] Engine completion failed: ${t.message}")
                emptyList()
            }
            if (DEBUG_COMPLETION) {
                val preview = engineItems.take(10).joinToString { it.name }
                log.info("[LYNG_DEBUG] Engine items: count=${engineItems.size} preview=[${preview}]")
            }
            // If we are in member context and the engine produced nothing, try a guarded local fallback
            if (memberDotPos != null && engineItems.isEmpty()) {
                if (DEBUG_COMPLETION) log.info("[LYNG_DEBUG] Fallback: engine returned 0 in member context; trying local inference")
                // Build imported modules from text (lenient) + stdlib; avoid heavy MiniAst here
                val fromText = extractImportsFromText(text)
                val imported = LinkedHashSet<String>().apply {
                    fromText.forEach { add(it) }
                    add("lyng.stdlib")
                }.toList()
                // Try inferring return/receiver class around the dot
                val inferred =
                    // Prefer MiniAst-based inference (return type from member call or receiver type)
                    DocLookupUtils.guessReturnClassFromMemberCallBeforeMini(mini, text, memberDotPos, imported, binding)
                        ?: DocLookupUtils.guessReceiverClassViaMini(mini, text, memberDotPos, imported, binding)
                        ?: 
                    DocLookupUtils.guessReturnClassFromMemberCallBefore(text, memberDotPos, imported, mini)
                        ?: DocLookupUtils.guessReturnClassFromTopLevelCallBefore(text, memberDotPos, imported, mini)
                        ?: DocLookupUtils.guessReturnClassAcrossKnownCallees(text, memberDotPos, imported, mini)
                        ?: DocLookupUtils.guessReceiverClass(text, memberDotPos, imported, mini)
                if (inferred != null) {
                    if (DEBUG_COMPLETION) log.info("[LYNG_DEBUG] Fallback inferred receiver/return class='$inferred' — offering its members")
                    offerMembers(emit, imported, inferred, sourceText = text, mini = mini)
                    return
                } else {
                    if (DEBUG_COMPLETION) log.info("[LYNG_DEBUG] Fallback could not infer class; keeping list empty (no globals after dot)")
                    return
                }
            }
            // In global context, add params in scope first (engine does not include them)
            if (memberDotPos == null && mini != null) {
                offerParamsInScope(emit, mini, text, caret)
            }
            // Render engine items
            for (ci in engineItems) {
                val builder = when (ci.kind) {
                    Kind.Function -> LookupElementBuilder.create(ci.name)
                        .withIcon(AllIcons.Nodes.Function)
                        .let { b -> if (!ci.tailText.isNullOrBlank()) b.withTailText(ci.tailText, true) else b }
                        .let { b -> if (!ci.typeText.isNullOrBlank()) b.withTypeText(ci.typeText, true) else b }
                        .withInsertHandler(ParenInsertHandler)
                    Kind.Method -> LookupElementBuilder.create(ci.name)
                        .withIcon(AllIcons.Nodes.Method)
                        .let { b -> if (!ci.tailText.isNullOrBlank()) b.withTailText(ci.tailText, true) else b }
                        .let { b -> if (!ci.typeText.isNullOrBlank()) b.withTypeText(ci.typeText, true) else b }
                        .withInsertHandler(ParenInsertHandler)
                    Kind.Class_ -> LookupElementBuilder.create(ci.name)
                        .withIcon(AllIcons.Nodes.Class)
                    Kind.Enum -> LookupElementBuilder.create(ci.name)
                        .withIcon(AllIcons.Nodes.Enum)
                    Kind.Value -> LookupElementBuilder.create(ci.name)
                        .withIcon(AllIcons.Nodes.Field)
                        .let { b -> if (!ci.typeText.isNullOrBlank()) b.withTypeText(ci.typeText, true) else b }
                    Kind.Field -> LookupElementBuilder.create(ci.name)
                        .withIcon(AllIcons.Nodes.Field)
                        .let { b -> if (!ci.typeText.isNullOrBlank()) b.withTypeText(ci.typeText, true) else b }
                }
                emit(builder)
            }
            // In member context, ensure stdlib extension-like methods (e.g., String.re) are present
            if (memberDotPos != null) {
                val existing = engineItems.map { it.name }.toMutableSet()
                val fromText = extractImportsFromText(text)
                val imported = LinkedHashSet<String>().apply {
                    fromText.forEach { add(it) }
                    add("lyng.stdlib")
                }.toList()
                val inferredClass =
                    DocLookupUtils.guessReturnClassFromMemberCallBeforeMini(mini, text, memberDotPos, imported, binding)
                        ?: DocLookupUtils.guessReceiverClassViaMini(mini, text, memberDotPos, imported, binding)
                        ?: DocLookupUtils.guessReturnClassFromMemberCallBefore(text, memberDotPos, imported, mini)
                        ?: DocLookupUtils.guessReturnClassFromTopLevelCallBefore(text, memberDotPos, imported, mini)
                        ?: DocLookupUtils.guessReturnClassAcrossKnownCallees(text, memberDotPos, imported, mini)
                        ?: DocLookupUtils.guessReceiverClass(text, memberDotPos, imported, mini)
                if (!inferredClass.isNullOrBlank()) {
                    val ext = BuiltinDocRegistry.extensionMemberNamesFor(inferredClass)
                    if (DEBUG_COMPLETION) log.info("[LYNG_DEBUG] Post-engine extension check for $inferredClass: ${'$'}{ext}")
                    for (name in ext) {
                        if (existing.contains(name)) continue
                        val resolved = DocLookupUtils.resolveMemberWithInheritance(imported, inferredClass, name, mini)
                        if (resolved != null) {
                            when (val member = resolved.second) {
                                is MiniMemberFunDecl -> {
                                    val params = member.params.joinToString(", ") { it.name }
                                    val ret = typeOf(member.returnType)
                                    val builder = LookupElementBuilder.create(name)
                                        .withIcon(AllIcons.Nodes.Method)
                                        .withTailText("(${ '$' }params)", true)
                                        .withTypeText(ret, true)
                                        .withInsertHandler(ParenInsertHandler)
                                    emit(builder)
                                    existing.add(name)
                                }
                                is MiniMemberValDecl -> {
                                    val builder = LookupElementBuilder.create(name)
                                        .withIcon(if (member.mutable) AllIcons.Nodes.Variable else AllIcons.Nodes.Field)
                                        .withTypeText(typeOf(member.type), true)
                                    emit(builder)
                                    existing.add(name)
                                }
                                is MiniInitDecl -> {}
                            }
                        } else {
                            // Fallback: emit simple method name without detailed types
                            val builder = LookupElementBuilder.create(name)
                                .withIcon(AllIcons.Nodes.Method)
                                .withTailText("()", true)
                                .withInsertHandler(ParenInsertHandler)
                            emit(builder)
                            existing.add(name)
                        }
                    }
                }
            }
            // If in member context and engine items are suspiciously sparse, try to enrich via local inference + offerMembers
            if (memberDotPos != null && engineItems.size < 3) {
                if (DEBUG_COMPLETION) log.info("[LYNG_DEBUG] Engine produced only ${engineItems.size} items in member context — trying enrichment")
                val fromText = extractImportsFromText(text)
                val imported = LinkedHashSet<String>().apply {
                    fromText.forEach { add(it) }
                    add("lyng.stdlib")
                }.toList()
                val inferred =
                    DocLookupUtils.guessReturnClassFromMemberCallBeforeMini(mini, text, memberDotPos, imported, binding)
                        ?: DocLookupUtils.guessReceiverClassViaMini(mini, text, memberDotPos, imported, binding)
                        ?: DocLookupUtils.guessReturnClassFromMemberCallBefore(text, memberDotPos, imported, mini)
                        ?: DocLookupUtils.guessReturnClassFromTopLevelCallBefore(text, memberDotPos, imported, mini)
                        ?: DocLookupUtils.guessReturnClassAcrossKnownCallees(text, memberDotPos, imported, mini)
                        ?: DocLookupUtils.guessReceiverClass(text, memberDotPos, imported, mini)
                if (inferred != null) {
                    if (DEBUG_COMPLETION) log.info("[LYNG_DEBUG] Enrichment inferred class='$inferred' — offering its members")
                    offerMembers(emit, imported, inferred, sourceText = text, mini = mini)
                }
            }
            return
        }
        private fun offerDecl(emit: (com.intellij.codeInsight.lookup.LookupElement) -> Unit, d: MiniDecl) {
            val name = d.name
            val builder = when (d) {
                is MiniFunDecl -> {
                    val params = d.params.joinToString(", ") { it.name }
                    val ret = typeOf(d.returnType)
                    val tail = "(${params})"
                    LookupElementBuilder.create(name)
                        .withIcon(AllIcons.Nodes.Function)
                        .withTailText(tail, true)
                        .withTypeText(ret, true)
                        .withInsertHandler(ParenInsertHandler)
                }
                is MiniClassDecl -> LookupElementBuilder.create(name)
                    .withIcon(AllIcons.Nodes.Class)
                is MiniValDecl -> {
                    val kindIcon = if (d.mutable) AllIcons.Nodes.Variable else AllIcons.Nodes.Field
                    LookupElementBuilder.create(name)
                        .withIcon(kindIcon)
                        .withTypeText(typeOf(d.type), true)
                }
                is MiniEnumDecl -> LookupElementBuilder.create(name)
                    .withIcon(AllIcons.Nodes.Enum)
            }
            emit(builder)
        }
        private object ParenInsertHandler : InsertHandler<com.intellij.codeInsight.lookup.LookupElement> {
            override fun handleInsert(context: InsertionContext, item: com.intellij.codeInsight.lookup.LookupElement) {
                val doc = context.document
                val tailOffset = context.tailOffset
                val nextChar = doc.charsSequence.getOrNull(tailOffset)
                if (nextChar != '(') {
                    doc.insertString(tailOffset, "()")
                    context.editor.caretModel.moveToOffset(tailOffset + 1)
                }
            }
        }
        // --- Member completion helpers ---
        private fun offerMembers(
            emit: (com.intellij.codeInsight.lookup.LookupElement) -> Unit,
            imported: List<String>,
            className: String,
            staticOnly: Boolean = false
        , sourceText: String,
        mini: MiniScript? = null
        ) {
            val classes = DocLookupUtils.aggregateClasses(imported, mini)
            if (DEBUG_COMPLETION) {
                val keys = classes.keys.joinToString(", ")
                log.info("[LYNG_DEBUG] offerMembers: imported=${imported} classes=[${keys}] target=${className}")
            }
            val visited = mutableSetOf<String>()
            // Collect separated to keep tiers: direct first, then inherited
            val directMap = LinkedHashMap<String, MutableList<MiniMemberDecl>>()
            val inheritedMap = LinkedHashMap<String, MutableList<MiniMemberDecl>>()
            // 0) Prefer locally-declared class members (same-file) when available
            val localClass = mini?.declarations?.filterIsInstance<MiniClassDecl>()?.firstOrNull { it.name == className }
            if (localClass != null) {
                for (m in localClass.members) {
                    val list = directMap.getOrPut(m.name) { mutableListOf() }
                    list.add(m)
                }
                // If MiniAst didn't populate members (empty), try to scan class body text for member signatures
                if (localClass.members.isEmpty()) {
                    val scanned = DocLookupUtils.scanLocalClassMembersFromText(mini, text = sourceText, cls = localClass)
                    if (DEBUG_COMPLETION) log.info("[LYNG_DEBUG] Local scan for class ${localClass.name}: found ${scanned.size} members -> ${scanned.keys}")
                    for ((name, sig) in scanned) {
                        when (sig.kind) {
                            "fun" -> {
                                val builder = LookupElementBuilder.create(name)
                                    .withIcon(AllIcons.Nodes.Method)
                                    .withTailText("(" + (sig.params?.joinToString(", ") ?: "") + ")", true)
                                    .let { b -> sig.typeText?.let { b.withTypeText(": $it", true) } ?: b }
                                    .withInsertHandler(ParenInsertHandler)
                                emit(builder)
                            }
                            "val", "var" -> {
                                val builder = LookupElementBuilder.create(name)
                                    .withIcon(if (sig.kind == "var") AllIcons.Nodes.Variable else AllIcons.Nodes.Field)
                                    .let { b -> sig.typeText?.let { b.withTypeText(": $it", true) } ?: b }
                                emit(builder)
                            }
                        }
                    }
                }
            }
            fun addMembersOf(clsName: String, tierDirect: Boolean) {
                val cls = classes[clsName] ?: return
                val target = if (tierDirect) directMap else inheritedMap
                for (m in cls.members) {
                    if (staticOnly) {
                        // Filter only static members in namespace/static context
                        when (m) {
                            is MiniMemberFunDecl -> if (!m.isStatic) continue
                            is MiniMemberValDecl -> if (!m.isStatic) continue
                            is MiniInitDecl -> continue
                        }
                    }
                    val list = target.getOrPut(m.name) { mutableListOf() }
                    list.add(m)
                }
                // Then inherited
                for (base in cls.bases) {
                    if (visited.add(base)) addMembersOf(base, false)
                }
            }
            visited.add(className)
            addMembersOf(className, true)
            if (DEBUG_COMPLETION) {
                log.info("[LYNG_DEBUG] offerMembers: direct=${directMap.size} inherited=${inheritedMap.size} for ${className}")
            }
            // If the docs model lacks explicit bases for some core container classes,
            // conservatively supplement with preferred parents to expose common ops.
            fun supplementPreferredBases(receiver: String) {
                // Preference/known lineage map kept tiny and safe
                val extras = when (receiver) {
                    "List" -> listOf("Collection", "Iterable")
                    "Array" -> listOf("Collection", "Iterable")
                    // In practice, many high-level ops users expect on iteration live on Iterable.
                    // For editor assistance, expose Iterable ops for Iterator receivers too.
                    "Iterator" -> listOf("Iterable")
                    else -> emptyList()
                }
                for (base in extras) {
                    if (visited.add(base)) addMembersOf(base, false)
                }
            }
            supplementPreferredBases(className)
            fun emitGroup(map: LinkedHashMap<String, MutableList<MiniMemberDecl>>) {
                val keys = map.keys.sortedBy { it.lowercase() }
                for (name in keys) {
                    val list = map[name] ?: continue
                    // Choose a representative for display:
                    // 1) Prefer a method with a known return type
                    // 2) Else any method
                    // 3) Else the first variant
                    val rep =
                        list.asSequence()
                            .filterIsInstance<MiniMemberFunDecl>()
                            .firstOrNull { it.returnType != null }
                            ?: list.firstOrNull { it is MiniMemberFunDecl }
                            ?: list.first()
                    when (rep) {
                        is MiniMemberFunDecl -> {
                            val params = rep.params.joinToString(", ") { it.name }
                            val ret = typeOf(rep.returnType)
                            val extra = list.count { it is MiniMemberFunDecl } - 1
                            val overloads = if (extra > 0) " (+$extra overloads)" else ""
                            val tail = "(${params})$overloads"
                            val icon = AllIcons.Nodes.Method
                            val builder = LookupElementBuilder.create(name)
                                .withIcon(icon)
                                .withTailText(tail, true)
                                .withTypeText(ret, true)
                                .withInsertHandler(ParenInsertHandler)
                            emit(builder)
                        }
                        is MiniMemberValDecl -> {
                            val icon = if (rep.mutable) AllIcons.Nodes.Variable else AllIcons.Nodes.Field
                            // Prefer a field variant with known type if available
                            val chosen = list.asSequence()
                                .filterIsInstance<MiniMemberValDecl>()
                                .firstOrNull { it.type != null } ?: rep
                            val builder = LookupElementBuilder.create(name)
                                .withIcon(icon)
                                .withTypeText(typeOf(chosen.type), true)
                            emit(builder)
                        }
                        is MiniInitDecl -> {}
                    }
                }
            }
            // Emit what we have first
            emitGroup(directMap)
            emitGroup(inheritedMap)
            // If suggestions are suspiciously sparse for known container classes,
            // try to conservatively supplement using a curated list resolved via docs registry.
            val totalSuggested = directMap.size + inheritedMap.size
            val isContainer = className in setOf("Iterator", "Iterable", "Collection", "List", "Array")
            if (isContainer && totalSuggested < 3) {
                if (DEBUG_COMPLETION) log.info("[LYNG_DEBUG] Supplementing members for $className; had=$totalSuggested")
                val common = when (className) {
                    "Iterator" -> listOf(
                        "hasNext", "next", "forEach", "map", "filter", "take", "drop", "toList", "count", "any", "all"
                    )
                    else -> listOf(
                        // Iterable/Collection/List/Array common ops
                        "size", "isEmpty", "map", "flatMap", "filter", "first", "last", "contains",
                        "any", "all", "count", "forEach", "toList", "toSet"
                    )
                }
                val already = (directMap.keys + inheritedMap.keys).toMutableSet()
                for (name in common) {
                    if (name in already) continue
                    // Try resolve across classes first to get types/params; if it fails, emit a synthetic safe suggestion.
                    val resolved = DocLookupUtils.findMemberAcrossClasses(imported, name)
                    if (resolved != null) {
                        val member = resolved.second
                        when (member) {
                            is MiniMemberFunDecl -> {
                                val params = member.params.joinToString(", ") { it.name }
                                val ret = typeOf(member.returnType)
                                val builder = LookupElementBuilder.create(name)
                                    .withIcon(AllIcons.Nodes.Method)
                                    .withTailText("(${params})", true)
                                    .withTypeText(ret, true)
                                    .withInsertHandler(ParenInsertHandler)
                                emit(builder)
                                already.add(name)
                            }
                            is MiniMemberValDecl -> {
                                val builder = LookupElementBuilder.create(name)
                                    .withIcon(AllIcons.Nodes.Field)
                                    .withTypeText(typeOf(member.type), true)
                                emit(builder)
                                already.add(name)
                            }
                            is MiniInitDecl -> {}
                        }
                    } else {
                        // Synthetic fallback: method without detailed params/types to improve UX in absence of docs
                        val isProperty = name in setOf("size", "length")
                        val builder = if (isProperty) {
                            LookupElementBuilder.create(name)
                                .withIcon(AllIcons.Nodes.Field)
                        } else {
                            LookupElementBuilder.create(name)
                                .withIcon(AllIcons.Nodes.Method)
                                .withTailText("()", true)
                                .withInsertHandler(ParenInsertHandler)
                        }
                        emit(builder)
                        already.add(name)
                    }
                }
            }
            // Supplement with stdlib extension members defined in root.lyng (e.g., fun String.trim(...))
            run {
                val already = (directMap.keys + inheritedMap.keys).toMutableSet()
                val ext = BuiltinDocRegistry.extensionMemberNamesFor(className)
                if (DEBUG_COMPLETION) log.info("[LYNG_DEBUG] Extensions for $className: count=${ext.size} -> ${ext}")
                for (name in ext) {
                    if (already.contains(name)) continue
                    // Try to resolve full signature via registry first to get params and return type
                    val resolved = DocLookupUtils.resolveMemberWithInheritance(imported, className, name)
                    if (resolved != null) {
                        when (val member = resolved.second) {
                            is MiniMemberFunDecl -> {
                                val params = member.params.joinToString(", ") { it.name }
                                val ret = typeOf(member.returnType)
                                val builder = LookupElementBuilder.create(name)
                                    .withIcon(AllIcons.Nodes.Method)
                                    .withTailText("(${params})", true)
                                    .withTypeText(ret, true)
                                    .withInsertHandler(ParenInsertHandler)
                                emit(builder)
                                already.add(name)
                                continue
                            }
                            is MiniMemberValDecl -> {
                                val builder = LookupElementBuilder.create(name)
                                    .withIcon(if (member.mutable) AllIcons.Nodes.Variable else AllIcons.Nodes.Field)
                                    .withTypeText(typeOf(member.type), true)
                                emit(builder)
                                already.add(name)
                                continue
                            }
                            is MiniInitDecl -> {}
                        }
                    }
                    // Fallback: emit without detailed types if we couldn't resolve
                    val builder = LookupElementBuilder.create(name)
                        .withIcon(AllIcons.Nodes.Method)
                        .withTailText("()", true)
                        .withInsertHandler(ParenInsertHandler)
                    emit(builder)
                    already.add(name)
                }
            }
        }
        // --- MiniAst-based inference helpers ---
        private fun offerParamsInScope(emit: (com.intellij.codeInsight.lookup.LookupElement) -> Unit, mini: MiniScript, text: String, caret: Int) {
            val src = mini.range.start.source
            // Find function whose body contains caret or whose whole range contains caret
            val fns = mini.declarations.filterIsInstance<MiniFunDecl>()
            for (fn in fns) {
                val start = src.offsetOf(fn.range.start)
                val end = src.offsetOf(fn.range.end).coerceAtMost(text.length)
                if (caret in start..end) {
                    for (p in fn.params) {
                        val builder = LookupElementBuilder.create(p.name)
                            .withIcon(AllIcons.Nodes.Variable)
                            .withTypeText(typeOf(p.type), true)
                        emit(builder)
                    }
                    return
                }
            }
        }
        // Lenient textual import extractor (duplicated from QuickDoc privately)
        private fun extractImportsFromText(text: String): List<String> {
            val result = LinkedHashSet<String>()
            val re = Regex("^\\s*import\\s+([a-zA-Z_][a-zA-Z0-9_]*(?:\\.[a-zA-Z_][a-zA-Z0-9_]*)*)", RegexOption.MULTILINE)
            re.findAll(text).forEach { m ->
                val raw = m.groupValues.getOrNull(1)?.trim().orEmpty()
                if (raw.isNotEmpty()) {
                    val canon = if (raw.startsWith("lyng.")) raw else "lyng.$raw"
                    result.add(canon)
                }
            }
            return result.toList()
        }
        private fun typeOf(t: MiniTypeRef?): String {
            return when (t) {
                null -> ""
                is MiniTypeName -> t.segments.lastOrNull()?.name?.let { ": $it" } ?: ""
                is MiniGenericType -> {
                    val base = typeOf(t.base).removePrefix(": ")
                    val args = t.args.joinToString(",") { typeOf(it).removePrefix(": ") }
                    ": ${base}<${args}>"
                }
                is MiniFunctionType -> ": (fn)"
                is MiniTypeVar -> ": ${t.name}"
            }
        }
    }
 }
@@ -0,0 +1,55 @@
 /*
 * Minimal fallback docs seeding for `lyng.io.fs` used only inside the IDEA plugin
 * when external docs module (lyngio) is not present on the classpath.
 *
 * We keep it tiny and plugin-local to avoid coupling core library to external packages.
 */
 package net.sergeych.lyng.idea.docs
 import net.sergeych.lyng.miniast.BuiltinDocRegistry
 import net.sergeych.lyng.miniast.ParamDoc
 import net.sergeych.lyng.miniast.TypeGenericDoc
 import net.sergeych.lyng.miniast.type
 internal object FsDocsFallback {
    @Volatile
    private var seeded = false
    fun ensureOnce(): Boolean {
        if (seeded) return true
        synchronized(this) {
            if (seeded) return true
            BuiltinDocRegistry.module("lyng.io.fs") {
                // Class Path summary and a few commonly used methods
                classDoc(name = "Path", doc = "Filesystem path class. Construct with a string: `Path(\"/tmp\")`.") {
                    method(name = "exists", doc = "Whether the path exists on the filesystem.", returns = type("lyng.Bool"))
                    method(name = "isFile", doc = "Whether the path exists and is a file.", returns = type("lyng.Bool"))
                    method(name = "isDir", doc = "Whether the path exists and is a directory.", returns = type("lyng.Bool"))
                    method(name = "readUtf8", doc = "Read the entire file as UTF-8 string.", returns = type("lyng.String"))
                    method(
                        name = "writeUtf8",
                        doc = "Write UTF-8 string to the file (overwrite).",
                        params = listOf(ParamDoc("text", type("lyng.String")))
                    )
                    method(
                        name = "bytes",
                        doc = "Iterate file content as `Buffer` chunks.",
                        params = listOf(ParamDoc("size", type("lyng.Int"))),
                        returns = TypeGenericDoc(type("lyng.Iterator"), listOf(type("lyng.Buffer")))
                    )
                    method(
                        name = "lines",
                        doc = "Iterate file as lines of text.",
                        returns = TypeGenericDoc(type("lyng.Iterator"), listOf(type("lyng.String")))
                    )
                }
                // Top-level exported constants
                valDoc(name = "Path", doc = "Filesystem path class. Construct with a string: `Path(\"/tmp\")`.", type = type("Path"))
                valDoc(name = "Paths", doc = "Alias of `Path` for those who prefer plural form.", type = type("Path"))
            }
            seeded = true
            return true
        }
    }
 }
@@ -0,0 +1,670 @@
 /*
 * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.docs
 import com.intellij.lang.documentation.AbstractDocumentationProvider
 import com.intellij.openapi.diagnostic.Logger
 import com.intellij.openapi.editor.Document
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.util.TextRange
 import com.intellij.psi.PsiElement
 import com.intellij.psi.PsiFile
 import kotlinx.coroutines.runBlocking
 import net.sergeych.lyng.Compiler
 import net.sergeych.lyng.Pos
 import net.sergeych.lyng.Source
 import net.sergeych.lyng.highlight.offsetOf
 import net.sergeych.lyng.idea.LyngLanguage
 import net.sergeych.lyng.idea.util.IdeLenientImportProvider
 import net.sergeych.lyng.idea.util.TextCtx
 import net.sergeych.lyng.miniast.*
 /**
 * Quick Docs backed by MiniAst: when caret is on an identifier that corresponds
 * to a declaration name or parameter, render a simple HTML with kind, signature,
 * and doc summary if present.
 */
 class LyngDocumentationProvider : AbstractDocumentationProvider() {
    private val log = Logger.getInstance(LyngDocumentationProvider::class.java)
    // Toggle to trace inheritance-based resolutions in Quick Docs. Keep false for normal use.
    private val DEBUG_INHERITANCE = false
    // Global Quick Doc debug toggle (OFF by default). When false, [LYNG_DEBUG] logs are suppressed.
    private val DEBUG_LOG = false
    override fun generateDoc(element: PsiElement?, originalElement: PsiElement?): String? {
        // Try load external docs registrars (e.g., lyngio) if present on classpath
        ensureExternalDocsRegistered()
        // Ensure stdlib Obj*-defined docs (e.g., String methods via ObjString.addFnDoc) are initialized
        try {
            net.sergeych.lyng.miniast.StdlibDocsBootstrap.ensure()
        } catch (_: Throwable) {
            // best-effort; absence must not break Quick Doc
        }
        if (element == null) return null
        val file: PsiFile = element.containingFile ?: return null
        val document: Document = file.viewProvider.document ?: return null
        val text = document.text
        // Determine caret/lookup offset from the element range
        val offset = originalElement?.textRange?.startOffset ?: element.textRange.startOffset
        val idRange = TextCtx.wordRangeAt(text, offset) ?: run {
            if (DEBUG_LOG) log.info("[LYNG_DEBUG] QuickDoc: no word at offset=$offset in ${file.name}")
            return null
        }
        if (idRange.isEmpty) return null
        val ident = text.substring(idRange.startOffset, idRange.endOffset)
        if (DEBUG_LOG) log.info("[LYNG_DEBUG] QuickDoc: ident='$ident' at ${idRange.startOffset}..${idRange.endOffset} in ${file.name}")
        // Build MiniAst for this file (fast and resilient). Best-effort; on failure continue with partial AST.
        val sink = MiniAstBuilder()
        val provider = IdeLenientImportProvider.create()
        val src = Source("<ide>", text)
        val mini = try {
            runBlocking { Compiler.compileWithMini(src, provider, sink) }
            sink.build()
        } catch (t: Throwable) {
            if (DEBUG_LOG) log.warn("[LYNG_DEBUG] QuickDoc: compileWithMini produced partial AST: ${t.message}")
            sink.build()
        } ?: MiniScript(MiniRange(Pos(src, 1, 1), Pos(src, 1, 1)))
        val source = src
        // Try resolve to: function param at position, function/class/val declaration at position
        // 1) Use unified declaration detection
        DocLookupUtils.findDeclarationAt(mini, offset, ident)?.let { (name, kind) ->
            if (DEBUG_LOG) log.info("[LYNG_DEBUG] QuickDoc: matched declaration '$name' kind=$kind")
            // Find the actual declaration object to render
            for (d in mini.declarations) {
                if (d.name == name && source.offsetOf(d.nameStart) <= offset && source.offsetOf(d.nameStart) + d.name.length > offset) {
                    return renderDeclDoc(d)
                }
                // Handle members if it was a member
                if (d is MiniClassDecl) {
                    for (m in d.members) {
                        if (m.name == name && source.offsetOf(m.nameStart) <= offset && source.offsetOf(m.nameStart) + m.name.length > offset) {
                            return when (m) {
                                is MiniMemberFunDecl -> renderMemberFunDoc(d.name, m)
                                is MiniMemberValDecl -> renderMemberValDoc(d.name, m)
                                is MiniInitDecl -> null
                            }
                        }
                    }
                    for (cf in d.ctorFields) {
                        if (cf.name == name && source.offsetOf(cf.nameStart) <= offset && source.offsetOf(cf.nameStart) + cf.name.length > offset) {
                            // Render as a member val
                            val mv = MiniMemberValDecl(
                                range = MiniRange(cf.nameStart, cf.nameStart), // dummy
                                name = cf.name,
                                mutable = cf.mutable,
                                type = cf.type,
                                doc = null,
                                nameStart = cf.nameStart
                            )
                            return renderMemberValDoc(d.name, mv)
                        }
                    }
                    for (cf in d.classFields) {
                        if (cf.name == name && source.offsetOf(cf.nameStart) <= offset && source.offsetOf(cf.nameStart) + cf.name.length > offset) {
                            // Render as a member val
                            val mv = MiniMemberValDecl(
                                range = MiniRange(cf.nameStart, cf.nameStart), // dummy
                                name = cf.name,
                                mutable = cf.mutable,
                                type = cf.type,
                                doc = null,
                                nameStart = cf.nameStart
                            )
                            return renderMemberValDoc(d.name, mv)
                        }
                    }
                }
                if (d is MiniEnumDecl) {
                    if (d.entries.contains(name) && offset >= source.offsetOf(d.range.start) && offset <= source.offsetOf(d.range.end)) {
                        // For enum constant, we don't have detailed docs in MiniAst yet, but we can render a title
                        return "<div class='doc-title'>enum constant ${d.name}.${name}</div>"
                    }
                }
            }
            // Check parameters
            for (fn in mini.declarations.filterIsInstance<MiniFunDecl>()) {
                for (p in fn.params) {
                    if (p.name == name && source.offsetOf(p.nameStart) <= offset && source.offsetOf(p.nameStart) + p.name.length > offset) {
                        return renderParamDoc(fn, p)
                    }
                }
            }
        }
        // 3) usages in current file via Binder (resolves local variables, parameters, and classes)
        try {
            val binding = net.sergeych.lyng.binding.Binder.bind(text, mini)
            val ref = binding.references.firstOrNull { offset in it.start until it.end }
            if (ref != null) {
                val sym = binding.symbols.firstOrNull { it.id == ref.symbolId }
                if (sym != null) {
                    // Find local declaration that matches this symbol
                    val ds = mini.declarations.firstOrNull { decl ->
                        val s = source.offsetOf(decl.nameStart)
                        decl.name == sym.name && s == sym.declStart
                    }
                    if (ds != null) return renderDeclDoc(ds)
                    // Check parameters
                    for (fn in mini.declarations.filterIsInstance<MiniFunDecl>()) {
                        for (p in fn.params) {
                            val s = source.offsetOf(p.nameStart)
                            if (p.name == sym.name && s == sym.declStart) {
                                return renderParamDoc(fn, p)
                            }
                        }
                    }
                    // Check class members (fields/functions)
                    for (cls in mini.declarations.filterIsInstance<MiniClassDecl>()) {
                        for (m in cls.members) {
                            val s = source.offsetOf(m.nameStart)
                            if (m.name == sym.name && s == sym.declStart) {
                                return when (m) {
                                    is MiniMemberFunDecl -> renderMemberFunDoc(cls.name, m)
                                    is MiniMemberValDecl -> renderMemberValDoc(cls.name, m)
                                    is MiniInitDecl -> null
                                }
                            }
                        }
                        for (cf in cls.ctorFields) {
                            val s = source.offsetOf(cf.nameStart)
                            if (cf.name == sym.name && s == sym.declStart) {
                                // Render as a member val
                                val mv = MiniMemberValDecl(
                                    range = MiniRange(cf.nameStart, cf.nameStart), // dummy
                                    name = cf.name,
                                    mutable = cf.mutable,
                                    type = cf.type,
                                    doc = null,
                                    nameStart = cf.nameStart
                                )
                                return renderMemberValDoc(cls.name, mv)
                            }
                        }
                        for (cf in cls.classFields) {
                            val s = source.offsetOf(cf.nameStart)
                            if (cf.name == sym.name && s == sym.declStart) {
                                // Render as a member val
                                val mv = MiniMemberValDecl(
                                    range = MiniRange(cf.nameStart, cf.nameStart), // dummy
                                    name = cf.name,
                                    mutable = cf.mutable,
                                    type = cf.type,
                                    doc = null,
                                    nameStart = cf.nameStart
                                )
                                return renderMemberValDoc(cls.name, mv)
                            }
                        }
                    }
                }
            }
        } catch (e: Throwable) {
            if (DEBUG_LOG) log.warn("[LYNG_DEBUG] QuickDoc: local binder resolution failed: ${e.message}")
        }
        // 4) Member-context resolution first (dot immediately before identifier): handle literals and calls
        run {
            val dotPos = TextCtx.findDotLeft(text, idRange.startOffset)
                ?: TextCtx.findDotLeft(text, offset)
            if (dotPos != null) {
                // Build imported modules (MiniAst-derived if available, else lenient from text) and ensure stdlib is present
                val importedModules = DocLookupUtils.canonicalImportedModules(mini, text)
                // Try literal and call-based receiver inference around the dot
                val i = TextCtx.prevNonWs(text, dotPos - 1)
                val className: String? = when {
                    i >= 0 && text[i] == '"' -> "String"
                    i >= 0 && text[i] == ']' -> "List"
                    i >= 0 && text[i] == '}' -> "Dict"
                    i >= 0 && text[i] == ')' -> {
                        // Parenthesized expression: walk back to matching '(' and inspect the inner expression
                        var j = i - 1
                        var depth = 0
                        while (j >= 0) {
                            when (text[j]) {
                                ')' -> depth++
                                '(' -> if (depth == 0) break else depth--
                            }
                            j--
                        }
                        if (j >= 0 && text[j] == '(') {
                            val innerS = (j + 1).coerceAtLeast(0)
                            val innerE = i.coerceAtMost(text.length)
                            if (innerS < innerE) {
                                val inner = text.substring(innerS, innerE).trim()
                                when {
                                    inner.startsWith('"') && inner.endsWith('"') -> "String"
                                    inner.startsWith('[') && inner.endsWith(']') -> "List"
                                    inner.startsWith('{') && inner.endsWith('}') -> "Dict"
                                    else -> null
                                }
                            } else null
                        } else null
                    }
                    else -> {
                        val guessed = DocLookupUtils.guessClassFromCallBefore(text, dotPos, importedModules)
                        if (guessed != null) guessed
                        else {
                            // handle this@Type or as Type
                            val i2 = TextCtx.prevNonWs(text, dotPos - 1)
                            if (i2 >= 0) {
                                val identRange = TextCtx.wordRangeAt(text, i2 + 1)
                                if (identRange != null) {
                                    val id = text.substring(identRange.startOffset, identRange.endOffset)
                                    val k = TextCtx.prevNonWs(text, identRange.startOffset - 1)
                                    if (k >= 1 && text[k] == 's' && text[k-1] == 'a' && (k-1 == 0 || !text[k-2].isLetterOrDigit())) {
                                        id
                                    } else if (k >= 0 && text[k] == '@') {
                                        val k2 = TextCtx.prevNonWs(text, k - 1)
                                        if (k2 >= 3 && text.substring(k2 - 3, k2 + 1) == "this") id else null
                                    } else null
                                } else null
                            } else null
                        }
                    }
                }
                if (DEBUG_LOG) log.info("[LYNG_DEBUG] QuickDoc: memberCtx dotPos=${dotPos} chBeforeDot='${if (dotPos>0) text[dotPos-1] else ' '}' classGuess=${className} imports=${importedModules}")
                if (className != null) {
                    DocLookupUtils.resolveMemberWithInheritance(importedModules, className, ident)?.let { (owner, member) ->
                        if (DEBUG_INHERITANCE) log.info("[LYNG_DEBUG] QuickDoc: literal/call '$ident' resolved to $owner.${member.name}")
                        return when (member) {
                            is MiniMemberFunDecl -> renderMemberFunDoc(owner, member)
                            is MiniMemberValDecl -> renderMemberValDoc(owner, member)
                            is MiniInitDecl -> null
                        }
                    }
                    log.info("[LYNG_DEBUG] QuickDoc: resolve failed for ${className}.${ident}")
                }
            }
        }
        // 4) As a fallback, if the caret is on an identifier text that matches any declaration name, show that
        mini.declarations.firstOrNull { it.name == ident }?.let {
            log.info("[LYNG_DEBUG] QuickDoc: fallback by name '${it.name}' kind=${it::class.simpleName}")
            return renderDeclDoc(it)
        }
        // 4) Consult BuiltinDocRegistry for imported modules (top-level and class members)
        // Canonicalize import names using ImportManager, as users may write shortened names (e.g., "io.fs")
        var importedModules = DocLookupUtils.canonicalImportedModules(mini, text)
        // Always include stdlib as a fallback context
        if (!importedModules.contains("lyng.stdlib")) importedModules = importedModules + "lyng.stdlib"
        // 4a) try top-level decls
        importedModules.forEach { mod ->
            val docs = BuiltinDocRegistry.docsForModule(mod)
            val matches = docs.filterIsInstance<MiniFunDecl>().filter { it.name == ident }
            if (matches.isNotEmpty()) {
                // Prefer overload by arity when caret is in a call position; otherwise show first
                val arity = callArity(text, idRange.endOffset)
                val chosen = arity?.let { a -> matches.firstOrNull { it.params.size == a } } ?: matches.first()
                // If multiple and none matched arity, consider showing an overloads list
                if (arity != null && chosen.params.size != arity && matches.size > 1) {
                    return renderOverloads(ident, matches)
                }
                return renderDeclDoc(chosen)
            }
            // Also allow values/consts
            docs.filterIsInstance<MiniValDecl>().firstOrNull { it.name == ident }?.let { return renderDeclDoc(it) }
            // And classes/enums
            docs.filterIsInstance<MiniClassDecl>().firstOrNull { it.name == ident }?.let { return renderDeclDoc(it) }
            docs.filterIsInstance<MiniEnumDecl>().firstOrNull { it.name == ident }?.let { return renderDeclDoc(it) }
        }
        // Defensive fallback: if nothing found and it's a well-known stdlib function, render minimal inline docs
        if (ident == "println" || ident == "print") {
            val fallback = if (ident == "println")
                "Print values to the standard output and append a newline. Accepts any number of arguments." else
                "Print values to the standard output without a trailing newline. Accepts any number of arguments."
            val title = "function $ident(values)"
            return "<div class='doc-title'>${htmlEscape(title)}</div>" + styledMarkdown(htmlEscape(fallback))
        }
        // 4b) try class members like ClassName.member with inheritance fallback
        val lhs = previousWordBefore(text, idRange.startOffset)
        if (lhs != null && hasDotBetween(text, lhs.endOffset, idRange.startOffset)) {
            val className = text.substring(lhs.startOffset, lhs.endOffset)
            DocLookupUtils.resolveMemberWithInheritance(importedModules, className, ident)?.let { (owner, member) ->
                if (DEBUG_INHERITANCE) log.info("[LYNG_DEBUG] Inheritance resolved $className.$ident to $owner.${member.name}")
                return when (member) {
                    is MiniMemberFunDecl -> renderMemberFunDoc(owner, member)
                    is MiniMemberValDecl -> renderMemberValDoc(owner, member)
                    is MiniInitDecl -> null
                }
            }
        } else {
            // Heuristics when LHS is not an identifier (literals or call results):
            //  - List literal like [..].member → assume class List
            //  - Otherwise, try to find a unique class across imported modules that defines this member
            val dotPos = findDotLeft(text, idRange.startOffset)
            if (dotPos != null) {
                val guessed = when {
                    looksLikeListLiteralBefore(text, dotPos) -> "List"
                    else -> DocLookupUtils.guessClassFromCallBefore(text, dotPos, importedModules)
                }
                if (guessed != null) {
                    DocLookupUtils.resolveMemberWithInheritance(importedModules, guessed, ident)?.let { (owner, member) ->
                        if (DEBUG_INHERITANCE) log.info("[LYNG_DEBUG] Heuristic '$guessed.$ident' resolved via inheritance to $owner.${member.name}")
                        return when (member) {
                            is MiniMemberFunDecl -> renderMemberFunDoc(owner, member)
                            is MiniMemberValDecl -> renderMemberValDoc(owner, member)
                            is MiniInitDecl -> null
                        }
                    }
                } else {
                    // Extra fallback: try a small set of known receiver classes (covers literals when guess failed)
                    run {
                        val candidates = listOf("String", "Iterable", "Iterator", "List", "Collection", "Array", "Dict", "Regex")
                        for (c in candidates) {
                            DocLookupUtils.resolveMemberWithInheritance(importedModules, c, ident)?.let { (owner, member) ->
                                if (DEBUG_INHERITANCE) log.info("[LYNG_DEBUG] Candidate '$c.$ident' resolved via inheritance to $owner.${member.name}")
                                return when (member) {
                                    is MiniMemberFunDecl -> renderMemberFunDoc(owner, member)
                                    is MiniMemberValDecl -> renderMemberValDoc(owner, member)
                                    is MiniInitDecl -> null
                                }
                            }
                        }
                    }
                    // As a last resort try aggregated String members (extensions from stdlib text)
                    run {
                        val classes = DocLookupUtils.aggregateClasses(importedModules)
                        val stringCls = classes["String"]
                        val m = stringCls?.members?.firstOrNull { it.name == ident }
                        if (m != null) {
                            if (DEBUG_INHERITANCE) log.info("[LYNG_DEBUG] Aggregated fallback resolved String.$ident")
                            return when (m) {
                                is MiniMemberFunDecl -> renderMemberFunDoc("String", m)
                                is MiniMemberValDecl -> renderMemberValDoc("String", m)
                                is MiniInitDecl -> null
                            }
                        }
                    }
                    // Search across classes; prefer Iterable, then Iterator, then List for common ops
                    DocLookupUtils.findMemberAcrossClasses(importedModules, ident)?.let { (owner, member) ->
                        if (DEBUG_INHERITANCE) log.info("[LYNG_DEBUG] Cross-class '$ident' resolved to $owner.${member.name}")
                        return when (member) {
                            is MiniMemberFunDecl -> renderMemberFunDoc(owner, member)
                            is MiniMemberValDecl -> renderMemberValDoc(owner, member)
                            is MiniInitDecl -> null
                        }
                    }
                }
            }
        }
        if (DEBUG_LOG) log.info("[LYNG_DEBUG] QuickDoc: nothing found for ident='$ident'")
        return null
    }
    private val externalDocsLoaded: Boolean by lazy { tryLoadExternalDocs() }
    private fun ensureExternalDocsRegistered() { @Suppress("UNUSED_EXPRESSION") externalDocsLoaded }
    private fun tryLoadExternalDocs(): Boolean {
        return try {
            // Try known registrars; ignore failures if module is absent
            val cls = Class.forName("net.sergeych.lyngio.docs.FsBuiltinDocs")
            val m = cls.getMethod("ensure")
            m.invoke(null)
            log.info("[LYNG_DEBUG] QuickDoc: external docs loaded: net.sergeych.lyngio.docs.FsBuiltinDocs.ensure() OK")
            true
        } catch (_: Throwable) {
            // Seed a minimal plugin-local fallback so Path docs still work without lyngio
            val seeded = try {
                FsDocsFallback.ensureOnce()
            } catch (_: Throwable) { false }
            if (seeded) {
                log.info("[LYNG_DEBUG] QuickDoc: external docs NOT found; seeded plugin fallback for lyng.io.fs")
            } else {
                log.info("[LYNG_DEBUG] QuickDoc: external docs NOT found (lyngio absent on classpath)")
            }
            seeded
        }
    }
    override fun getCustomDocumentationElement(
        editor: Editor,
        file: PsiFile,
        contextElement: PsiElement?,
        targetOffset: Int
    ): PsiElement? {
        // Ensure our provider gets a chance for Lyng files regardless of PSI sophistication
        if (file.language != LyngLanguage) return null
        return contextElement ?: file.findElementAt(targetOffset)
    }
    private fun renderDeclDoc(d: MiniDecl): String {
        val title = when (d) {
            is MiniFunDecl -> "function ${d.name}${signatureOf(d)}"
            is MiniClassDecl -> "class ${d.name}"
            is MiniEnumDecl -> "enum ${d.name} { ${d.entries.joinToString(", ")} }"
            is MiniValDecl -> if (d.mutable) "var ${d.name}${typeOf(d.type)}" else "val ${d.name}${typeOf(d.type)}"
        }
        // Show full detailed documentation, not just the summary
        val raw = d.doc?.raw
        val doc: String? = if (raw.isNullOrBlank()) null else MarkdownRenderer.render(raw)
        val sb = StringBuilder()
        sb.append("<div class='doc-title'>").append(htmlEscape(title)).append("</div>")
        if (!doc.isNullOrBlank()) sb.append(styledMarkdown(doc))
        return sb.toString()
    }
    private fun renderParamDoc(fn: MiniFunDecl, p: MiniParam): String {
        val title = "parameter ${p.name}${typeOf(p.type)} in ${fn.name}${signatureOf(fn)}"
        return "<div class='doc-title'>${htmlEscape(title)}</div>"
    }
    private fun renderMemberFunDoc(className: String, m: MiniMemberFunDecl): String {
        val params = m.params.joinToString(", ") { p ->
            val ts = typeOf(p.type)
            if (ts.isNotBlank()) "${p.name}${ts}" else p.name
        }
        val ret = typeOf(m.returnType)
        val staticStr = if (m.isStatic) "static " else ""
        val title = "${staticStr}method $className.${m.name}(${params})${ret}"
        val raw = m.doc?.raw
        val doc: String? = if (raw.isNullOrBlank()) null else MarkdownRenderer.render(raw)
        val sb = StringBuilder()
        sb.append("<div class='doc-title'>").append(htmlEscape(title)).append("</div>")
        if (!doc.isNullOrBlank()) sb.append(styledMarkdown(doc))
        return sb.toString()
    }
    private fun renderMemberValDoc(className: String, m: MiniMemberValDecl): String {
        val ts = typeOf(m.type)
        val kind = if (m.mutable) "var" else "val"
        val staticStr = if (m.isStatic) "static " else ""
        val title = "${staticStr}${kind} $className.${m.name}${ts}"
        val raw = m.doc?.raw
        val doc: String? = if (raw.isNullOrBlank()) null else MarkdownRenderer.render(raw)
        val sb = StringBuilder()
        sb.append("<div class='doc-title'>").append(htmlEscape(title)).append("</div>")
        if (!doc.isNullOrBlank()) sb.append(styledMarkdown(doc))
        return sb.toString()
    }
    private fun typeOf(t: MiniTypeRef?): String = when (t) {
        is MiniTypeName -> ": ${t.segments.joinToString(".") { it.name }}${if (t.nullable) "?" else ""}"
        is MiniGenericType -> {
            val base = typeOf(t.base).removePrefix(": ")
            val args = t.args.joinToString(", ") { typeOf(it).removePrefix(": ") }
            ": ${base}<${args}>${if (t.nullable) "?" else ""}"
        }
        is MiniFunctionType -> ": (..) -> ..${if (t.nullable) "?" else ""}"
        is MiniTypeVar -> ": ${t.name}${if (t.nullable) "?" else ""}"
        null -> ""
    }
    private fun signatureOf(fn: MiniFunDecl): String {
        val params = fn.params.joinToString(", ") { p ->
            val ts = typeOf(p.type)
            if (ts.isNotBlank()) "${p.name}${ts}" else p.name
        }
        val ret = typeOf(fn.returnType)
        return "(${params})${ret}"
    }
    private fun htmlEscape(s: String): String = buildString(s.length) {
        for (ch in s) append(
            when (ch) {
                '<' -> "&lt;"
                '>' -> "&gt;"
                '&' -> "&amp;"
                '"' -> "&quot;"
                else -> ch
            }
        )
    }
    private fun styledMarkdown(html: String): String {
        // IntelliJ doc renderer sanitizes and may surface <style> content as text.
        // Strip any style tags defensively and keep markup lean; rely on platform defaults.
        val safe = stripStyleTags(html)
        return """
            <div class="lyng-doc-md" style="max-width:72ch; line-height:1.4; font-size:0.96em;">
              $safe
            </div>
        """.trimIndent()
    }
    private fun stripStyleTags(src: String): String {
        // Remove any <style>...</style> blocks (case-insensitive, dotall)
        val styleRegex = Regex("(?is)<style[^>]*>.*?</style>")
        return src.replace(styleRegex, "")
    }
    // --- Simple helpers to support overload selection and heuristics ---
    /**
     * If identifier at [rightAfterIdent] is followed by a call like `(a, b)`,
     * return the argument count; otherwise return null. Nested parentheses are
     * handled conservatively to skip commas inside lambdas/parentheses.
     */
    private fun callArity(text: String, rightAfterIdent: Int): Int? {
        var i = rightAfterIdent
        // Skip whitespace
        while (i < text.length && text[i].isWhitespace()) i++
        if (i >= text.length || text[i] != '(') return null
        i++
        var depth = 0
        var commas = 0
        var hasToken = false
        while (i < text.length) {
            val ch = text[i]
            when (ch) {
                '(' -> { depth++; hasToken = true }
                ')' -> {
                    if (depth == 0) {
                        // Empty parentheses => arity 0 if no token and no commas
                        if (!hasToken && commas == 0) return 0
                        return commas + 1
                    } else depth--
                }
                ',' -> if (depth == 0) { commas++; hasToken = false }
                '\n' -> {}
                else -> if (!ch.isWhitespace()) hasToken = true
            }
            i++
        }
        return null
    }
    private fun renderOverloads(name: String, overloads: List<MiniFunDecl>): String {
        val sb = StringBuilder()
        sb.append("<div class='doc-title'>Overloads for ").append(htmlEscape(name)).append("</div>")
        sb.append("<ul>")
        overloads.forEach { fn ->
            sb.append("<li><code>")
                .append(htmlEscape("fun ${fn.name}${signatureOf(fn)}"))
                .append("</code>")
            fn.doc?.summary?.let { sum -> sb.append(" — ").append(htmlEscape(sum)) }
            sb.append("</li>")
        }
        sb.append("</ul>")
        return sb.toString()
    }
    private fun wordRangeAt(text: String, offset: Int): TextRange? {
        if (text.isEmpty()) return null
        var s = offset.coerceIn(0, text.length)
        var e = s
        while (s > 0 && isIdentChar(text[s - 1])) s--
        while (e < text.length && isIdentChar(text[e])) e++
        return if (e > s) TextRange(s, e) else null
    }
    private fun previousWordBefore(text: String, offset: Int): TextRange? {
        // skip spaces and dots to the left, but stop after hitting a non-identifier or dot boundary
        var i = (offset - 1).coerceAtLeast(0)
        // first, move left past spaces
        while (i > 0 && text[i].isWhitespace()) i--
        // remember position to check for dot between words
        val end = i + 1
        // now find the start of the identifier
        while (i >= 0 && isIdentChar(text[i])) i--
        val start = (i + 1)
        return if (start < end && start >= 0) TextRange(start, end) else null
    }
    private fun hasDotBetween(text: String, leftEnd: Int, rightStart: Int): Boolean {
        val s = leftEnd.coerceAtLeast(0)
        val e = rightStart.coerceAtMost(text.length)
        if (e <= s) return false
        for (i in s until e) if (text[i] == '.') return true
        return false
    }
    private fun isIdentChar(c: Char): Boolean = c == '_' || c.isLetterOrDigit()
    // --- Helpers for inheritance-aware and heuristic member lookup ---
    // Removed: member/class resolution helpers moved to lynglib DocLookupUtils for reuse
    private fun findDotLeft(text: String, rightStart: Int): Int? {
        var i = (rightStart - 1).coerceAtLeast(0)
        while (i >= 0 && text[i].isWhitespace()) i--
        while (i >= 0) {
            val ch = text[i]
            if (ch == '.') return i
            if (ch == '\n') return null
            i--
        }
        return null
    }
    private fun looksLikeListLiteralBefore(text: String, dotPos: Int): Boolean {
        // Look left for a closing ']' possibly with spaces, then a matching '[' before a comma or assignment
        var i = (dotPos - 1).coerceAtLeast(0)
        while (i >= 0 && text[i].isWhitespace()) i--
        if (i < 0 || text[i] != ']') return false
        var depth = 0
        i--
        while (i >= 0) {
            val ch = text[i]
            when (ch) {
                ']' -> depth++
                '[' -> if (depth == 0) return true else depth--
                '\n' -> return false
            }
            i--
        }
        return false
    }
    // Removed: guessClassFromCallBefore moved to DocLookupUtils
 }
@@ -0,0 +1,21 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.docs
 // 243: We do not use DocumentationTarget API here. Quick Docs works via
 // AbstractDocumentationProvider registered as lang.documentationProvider.
 internal object LyngDocumentationTargetsPlaceholder
@@ -0,0 +1,64 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.docs
 import com.vladsch.flexmark.ext.autolink.AutolinkExtension
 import com.vladsch.flexmark.ext.gfm.strikethrough.StrikethroughExtension
 import com.vladsch.flexmark.ext.tables.TablesExtension
 import com.vladsch.flexmark.html.HtmlRenderer
 import com.vladsch.flexmark.parser.Parser
 import com.vladsch.flexmark.util.data.MutableDataSet
 /**
 * Rich Markdown renderer for the IDEA Quick Docs using Flexmark.
 *
 * - Supports fenced code blocks (with language class "language-xyz")
 * - Autolinks, tables, strikethrough
 * - Converts soft breaks to <br/>
 * - Tiny in-memory cache to avoid repeated parsing of the same doc blocks
 */
 object MarkdownRenderer {
    private val options = MutableDataSet().apply {
        set(Parser.EXTENSIONS, listOf(
            AutolinkExtension.create(),
            TablesExtension.create(),
            StrikethroughExtension.create(),
        ))
        // Add CSS class for code fences like ```lyng → class="language-lyng"
        set(HtmlRenderer.FENCED_CODE_LANGUAGE_CLASS_PREFIX, "language-")
        // Treat single newlines as a space (soft break) so consecutive lines remain one paragraph.
        // Real paragraph breaks require an empty line, hard breaks still work via Markdown (two spaces + \n).
        set(HtmlRenderer.SOFT_BREAK, " ")
    }
    private val parser: Parser = Parser.builder(options).build()
    private val renderer: HtmlRenderer = HtmlRenderer.builder(options).build()
    private val cache = object : LinkedHashMap<String, String>(256, 0.75f, true) {
        override fun removeEldestEntry(eldest: MutableMap.MutableEntry<String, String>?): Boolean = size > 256
    }
    fun render(markdown: String): String {
        // Fast path: cache
        synchronized(cache) { cache[markdown]?.let { return it } }
        val node = parser.parse(markdown)
        val html = renderer.render(node)
        synchronized(cache) { cache[markdown] = html }
        return html
    }
 }
@@ -0,0 +1,36 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.editor
 import com.intellij.codeInsight.editorActions.BackspaceHandlerDelegate
 import com.intellij.openapi.editor.Editor
 import com.intellij.psi.PsiFile
 /**
 * Backspace handler (currently inactive, not registered). Minimal stub to keep build green.
 * We will enable and implement smart behavior after API verification on the target IDE.
 */
 class LyngBackspaceHandler : BackspaceHandlerDelegate() {
    override fun beforeCharDeleted(c: Char, file: PsiFile, editor: Editor) {
        // no-op
    }
    override fun charDeleted(c: Char, file: PsiFile, editor: Editor): Boolean {
        // no-op; let default behavior stand
        return false
    }
 }
@@ -0,0 +1,23 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.editor
 /**
 * Disabled placeholder. We currently use the EditorPaste action handler (LyngPasteHandler)
 * which works across IDE builds without relying on RawText API.
 */
 class LyngCopyPastePreProcessorDisabled
@@ -0,0 +1,23 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.editor
 /**
 * Placeholder for 2024.3+ RawText-based CopyPastePreProcessor.
 * Not compiled against current SDK classpath; kept for future activation.
 */
 class LyngCopyPastePreProcessor243Disabled
@@ -0,0 +1,189 @@
 /*
 * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.editor
 import com.intellij.application.options.CodeStyle
 import com.intellij.codeInsight.editorActions.enter.EnterHandlerDelegate
 import com.intellij.codeInsight.editorActions.enter.EnterHandlerDelegate.Result
 import com.intellij.openapi.actionSystem.DataContext
 import com.intellij.openapi.command.WriteCommandAction
 import com.intellij.openapi.diagnostic.Logger
 import com.intellij.openapi.editor.Caret
 import com.intellij.openapi.editor.Document
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.editor.actionSystem.EditorActionHandler
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.util.Ref
 import com.intellij.openapi.util.TextRange
 import com.intellij.psi.PsiDocumentManager
 import com.intellij.psi.PsiFile
 import com.intellij.psi.codeStyle.CodeStyleManager
 import net.sergeych.lyng.format.LyngFormatConfig
 import net.sergeych.lyng.format.LyngFormatter
 import net.sergeych.lyng.idea.LyngLanguage
 import net.sergeych.lyng.idea.util.FormattingUtils.computeDesiredIndent
 import net.sergeych.lyng.idea.util.FormattingUtils.findFirstNonWs
 class LyngEnterHandler : EnterHandlerDelegate {
    private val log = Logger.getInstance(LyngEnterHandler::class.java)
    override fun preprocessEnter(
        file: PsiFile,
        editor: Editor,
        caretOffset: Ref<Int>,
        caretAdvance: Ref<Int>,
        dataContext: DataContext,
        originalHandler: EditorActionHandler?
    ): Result {
        if (file.language != LyngLanguage) return Result.Continue
        if (log.isDebugEnabled) log.debug("[LyngEnter] preprocess in Lyng file at caretOffset=${caretOffset.get()}")
        // Let the platform insert the newline; we will fix indentation in postProcessEnter.
        return Result.Continue
    }
    override fun postProcessEnter(file: PsiFile, editor: Editor, dataContext: DataContext): Result {
        if (file.language != LyngLanguage) return Result.Continue
        val project = file.project
        val doc = editor.document
        val psiManager = PsiDocumentManager.getInstance(project)
        psiManager.commitDocument(doc)
        // Handle all carets independently to keep multi-caret scenarios sane
        for (caret in editor.caretModel.allCarets) {
            val line = doc.safeLineNumber(caret.offset)
            if (line < 0) continue
            if (log.isDebugEnabled) log.debug("[LyngEnter] postProcess at line=$line offset=${caret.offset}")
            // Adjust previous '}' line if applicable, then indent the current line using our rules
            adjustBraceAndCurrentIndent(project, file, doc, line)
            // After indenting, ensure caret sits after the computed indent of this new line
            moveCaretToIndentIfOnLeadingWs(editor, doc, file, line, caret)
        }
        return Result.Continue
    }
    private fun adjustBraceAndCurrentIndent(project: Project, file: PsiFile, doc: Document, currentLine: Int) {
        val prevLine = currentLine - 1
        if (prevLine >= 0) {
            val prevText = doc.getLineText(prevLine)
            val trimmed = prevText.trimStart()
            // consider only code part before // comment
            val code = trimmed.substringBefore("//").trim()
            if (code == "}" || code == "*/") {
                // Adjust indent for the previous line if it's a block or comment closer
                val prevStart = doc.getLineStartOffset(prevLine)
                CodeStyleManager.getInstance(project).adjustLineIndent(file, prevStart)
                // Fallback for previous line: manual application
                val desiredPrev = computeDesiredIndent(project, doc, prevLine)
                val lineStartPrev = doc.getLineStartOffset(prevLine)
                val lineEndPrev = doc.getLineEndOffset(prevLine)
                val firstNonWsPrev = findFirstNonWs(doc, lineStartPrev, lineEndPrev)
                val currentIndentLenPrev = firstNonWsPrev - lineStartPrev
                if (doc.getText(TextRange(lineStartPrev, lineStartPrev + currentIndentLenPrev)) != desiredPrev) {
                    WriteCommandAction.runWriteCommandAction(project) {
                        doc.replaceString(lineStartPrev, lineStartPrev + currentIndentLenPrev, desiredPrev)
                    }
                }
            }
        }
        // Adjust indent for the current (new) line
        val currentStart = doc.getLineStartOffsetSafe(currentLine)
        val csm = CodeStyleManager.getInstance(project)
        csm.adjustLineIndent(file, currentStart)
        // Fallback: if the platform didn't physically insert indentation, compute it from our formatter and apply
        val lineStart = doc.getLineStartOffset(currentLine)
        val lineEnd = doc.getLineEndOffset(currentLine)
        val desiredIndent = computeDesiredIndent(project, doc, currentLine)
        val firstNonWs = findFirstNonWs(doc, lineStart, lineEnd)
        val currentIndentLen = firstNonWs - lineStart
        if (desiredIndent.isNotEmpty() || currentIndentLen != 0) {
            // Replace existing leading whitespace to match desired indent exactly
            val replaceFrom = lineStart
            val replaceTo = lineStart + currentIndentLen
            if (doc.getText(TextRange(replaceFrom, replaceTo)) != desiredIndent) {
                com.intellij.openapi.command.WriteCommandAction.runWriteCommandAction(project) {
                    doc.replaceString(replaceFrom, replaceTo, desiredIndent)
                }
                PsiDocumentManager.getInstance(project).commitDocument(doc)
                if (log.isDebugEnabled) {
                    val dbg = desiredIndent.replace("\t", "\\t")
                    log.debug("[LyngEnter] rewrote current line leading WS to '$dbg' at line=$currentLine")
                }
            }
        }
    }
    private fun reindentClosedBlockAroundBrace(project: Project, file: PsiFile, doc: Document, braceLine: Int) {
        // Find the absolute index of the '}' at or before end of braceLine
        val braceLineStart = doc.getLineStartOffset(braceLine)
        val braceLineEnd = doc.getLineEndOffset(braceLine)
        val rawBraceLine = doc.getText(TextRange(braceLineStart, braceLineEnd))
        val codeBraceLine = rawBraceLine.substringBefore("//")
        val closeRel = codeBraceLine.lastIndexOf('}')
        if (closeRel < 0) return
        val closeAbs = braceLineStart + closeRel
        // Compute the enclosing block range in raw text (document char sequence)
        val blockRange = net.sergeych.lyng.format.BraceUtils.findEnclosingBlockRange(doc.charsSequence, closeAbs, includeTrailingNewline = true)
            ?: return
        val options = CodeStyle.getIndentOptions(project, doc)
        val cfg = LyngFormatConfig(
            indentSize = options.INDENT_SIZE.coerceAtLeast(1),
            useTabs = options.USE_TAB_CHARACTER,
            continuationIndentSize = options.CONTINUATION_INDENT_SIZE.coerceAtLeast(options.INDENT_SIZE.coerceAtLeast(1)),
        )
        // Run partial reindent over the slice and replace only if changed
        val whole = doc.text
        val updated = LyngFormatter.reindentRange(whole, blockRange, cfg, preserveBaseIndent = true)
        if (updated != whole) {
            WriteCommandAction.runWriteCommandAction(project) {
                doc.replaceString(0, doc.textLength, updated)
            }
            PsiDocumentManager.getInstance(project).commitDocument(doc)
            if (log.isDebugEnabled) log.debug("[LyngEnter] reindented closed block range=${'$'}blockRange")
        }
    }
    private fun moveCaretToIndentIfOnLeadingWs(editor: Editor, doc: Document, file: PsiFile, line: Int, caret: Caret) {
        if (line < 0 || line >= doc.lineCount) return
        val lineStart = doc.getLineStartOffset(line)
        val lineEnd = doc.getLineEndOffset(line)
        val desiredIndent = computeDesiredIndent(file.project, doc, line)
        val firstNonWs = (lineStart + desiredIndent.length).coerceAtMost(doc.textLength)
        val caretOffset = caret.offset
        // If caret is at beginning of the line or still within the leading whitespace, move it after indent
        val target = firstNonWs.coerceIn(lineStart, lineEnd)
        caret.moveToOffset(target)
    }
    private fun Document.safeLineNumber(offset: Int): Int =
        getLineNumber(offset.coerceIn(0, textLength))
    private fun Document.getLineText(line: Int): String {
        if (line < 0 || line >= lineCount) return ""
        val start = getLineStartOffset(line)
        val end = getLineEndOffset(line)
        return getText(TextRange(start, end))
    }
    private fun Document.getLineStartOffsetSafe(line: Int): Int =
        if (line < 0) 0 else getLineStartOffset(line.coerceAtMost(lineCount - 1).coerceAtLeast(0))
 }
@@ -0,0 +1,22 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.editor
 /**
 * Disabled placeholder: we rely on LyngPasteHandler (EditorPaste action handler).
 */
 class LyngOnPasteProcessorDisabled
@@ -0,0 +1,166 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.editor
 import com.intellij.application.options.CodeStyle
 import com.intellij.openapi.actionSystem.DataContext
 import com.intellij.openapi.command.WriteCommandAction
 import com.intellij.openapi.editor.Caret
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler
 import com.intellij.openapi.ide.CopyPasteManager
 import com.intellij.psi.PsiDocumentManager
 import net.sergeych.lyng.format.LyngFormatConfig
 import net.sergeych.lyng.format.LyngFormatter
 import net.sergeych.lyng.idea.LyngLanguage
 import net.sergeych.lyng.idea.settings.LyngFormatterSettings
 import java.awt.datatransfer.DataFlavor
 /**
 * Smart Paste using an editor action handler (avoids RawText API variance).
 * Reindents pasted blocks when caret is in leading whitespace and the setting is enabled.
 */
 class LyngPasteHandler : EditorWriteActionHandler(true) {
    private val log = com.intellij.openapi.diagnostic.Logger.getInstance(LyngPasteHandler::class.java)
    override fun doExecute(editor: Editor, caret: Caret?, dataContext: DataContext) {
        val project = editor.project
        if (project == null) return
        val psiDocMgr = PsiDocumentManager.getInstance(project)
        val file = psiDocMgr.getPsiFile(editor.document)
        if (file == null || file.language != LyngLanguage) {
            pasteAsIs(editor)
            return
        }
        val settings = LyngFormatterSettings.getInstance(project)
        if (!settings.reindentPastedBlocks) {
            pasteAsIs(editor)
            return
        }
        val text = CopyPasteManager.getInstance().getContents<String>(DataFlavor.stringFlavor)
        if (text == null) {
            pasteAsIs(editor)
            return
        }
        val caretModel = editor.caretModel
        val effectiveCaret = caret ?: caretModel.currentCaret
        val doc = editor.document
        PsiDocumentManager.getInstance(project).commitDocument(doc)
        // Paste the text as-is first, then compute the inserted range and reindent that slice
        val options = CodeStyle.getIndentOptions(project, doc)
        val cfg = LyngFormatConfig(
            indentSize = options.INDENT_SIZE.coerceAtLeast(1),
            useTabs = options.USE_TAB_CHARACTER,
            continuationIndentSize = options.CONTINUATION_INDENT_SIZE.coerceAtLeast(options.INDENT_SIZE.coerceAtLeast(1)),
        )
        // Replace selection (if any) or insert at caret with original clipboard text
        val selModel = editor.selectionModel
        val replaceStart = if (selModel.hasSelection()) selModel.selectionStart else effectiveCaret.offset
        val replaceEnd = if (selModel.hasSelection()) selModel.selectionEnd else effectiveCaret.offset
        WriteCommandAction.runWriteCommandAction(project) {
            log.info("[LyngPaste] handler invoked for Lyng file; setting ON=${settings.reindentPastedBlocks}")
            // Step 1: paste as-is
            val beforeLen = doc.textLength
            doc.replaceString(replaceStart, replaceEnd, text)
            psiDocMgr.commitDocument(doc)
            // Step 2: compute the freshly inserted range robustly (account for line-separator normalization)
            val insertedStart = replaceStart
            val delta = doc.textLength - beforeLen + (replaceEnd - replaceStart)
            val insertedEndExclusive = (insertedStart + delta).coerceIn(insertedStart, doc.textLength)
            // Expand to full lines to let the formatter compute proper base/closing alignment
            val lineStart = run {
                var i = (insertedStart - 1).coerceAtLeast(0)
                while (i >= 0 && doc.charsSequence[i] != '\n') i--
                i + 1
            }
            var lineEndInclusive = run {
                var i = insertedEndExclusive
                val seq = doc.charsSequence
                while (i < seq.length && seq[i] != '\n') i++
                // include trailing newline if present
                if (i < seq.length && seq[i] == '\n') i + 1 else i
            }
            // If the next non-whitespace char right after the insertion is a closing brace '}',
            // include that brace line into the formatting slice for better block alignment.
            run {
                val seq = doc.charsSequence
                var j = insertedEndExclusive
                while (j < seq.length && (seq[j] == ' ' || seq[j] == '\t' || seq[j] == '\n' || seq[j] == '\r')) j++
                if (j < seq.length && seq[j] == '}') {
                    var k = j
                    while (k < seq.length && seq[k] != '\n') k++
                    lineEndInclusive = if (k < seq.length && seq[k] == '\n') k + 1 else k
                }
            }
            val fullTextBefore = doc.text
            val expandedRange = (lineStart until lineEndInclusive)
            log.info("[LyngPaste] inserted=[$insertedStart,$insertedEndExclusive) expanded=[$lineStart,$lineEndInclusive)")
            val updatedFull = LyngFormatter.reindentRange(
                fullTextBefore,
                expandedRange,
                cfg,
                preserveBaseIndent = true,
                baseIndentFrom = insertedStart
            )
            if (updatedFull != fullTextBefore) {
                val delta = updatedFull.length - fullTextBefore.length
                doc.replaceString(0, doc.textLength, updatedFull)
                psiDocMgr.commitDocument(doc)
                caretModel.moveToOffset((insertedEndExclusive + delta).coerceIn(0, doc.textLength))
                log.info("[LyngPaste] applied reindent to expanded range")
            } else {
                // No changes after reindent — just move caret to end of the inserted text
                caretModel.moveToOffset(insertedEndExclusive)
                log.info("[LyngPaste] no changes after reindent")
            }
            selModel.removeSelection()
        }
    }
    private fun pasteAsIs(editor: Editor) {
        val text = CopyPasteManager.getInstance().getContents<String>(DataFlavor.stringFlavor) ?: return
        pasteText(editor, text)
    }
    private fun pasteText(editor: Editor, text: String) {
        val project = editor.project ?: return
        val doc = editor.document
        val caretModel = editor.caretModel
        val selModel = editor.selectionModel
        WriteCommandAction.runWriteCommandAction(project) {
            val replaceStart = if (selModel.hasSelection()) selModel.selectionStart else caretModel.offset
            val replaceEnd = if (selModel.hasSelection()) selModel.selectionEnd else caretModel.offset
            doc.replaceString(replaceStart, replaceEnd, text)
            PsiDocumentManager.getInstance(project).commitDocument(doc)
            caretModel.moveToOffset(replaceStart + text.length)
            selModel.removeSelection()
        }
    }
    // no longer used
 }
@@ -0,0 +1,83 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.editor
 import com.intellij.application.options.CodeStyle
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.project.Project
 import com.intellij.psi.PsiDocumentManager
 import com.intellij.psi.PsiFile
 import net.sergeych.lyng.format.LyngFormatConfig
 import net.sergeych.lyng.format.LyngFormatter
 import net.sergeych.lyng.idea.LyngLanguage
 import net.sergeych.lyng.idea.settings.LyngFormatterSettings
 /**
 * Helper for preparing reindented pasted text. EP wiring is deferred until API
 * signature is finalized for the target IDE build.
 */
 object LyngPastePreProcessor {
    fun reindentForPaste(
        project: Project,
        editor: Editor,
        file: PsiFile,
        text: String
    ): String {
        if (file.language != LyngLanguage) return text
        val settings = LyngFormatterSettings.getInstance(project)
        if (!settings.reindentPastedBlocks) return text
        val doc = editor.document
        PsiDocumentManager.getInstance(project).commitDocument(doc)
        val options = CodeStyle.getIndentOptions(project, doc)
        val cfg = LyngFormatConfig(
            indentSize = options.INDENT_SIZE.coerceAtLeast(1),
            useTabs = options.USE_TAB_CHARACTER,
            continuationIndentSize = options.CONTINUATION_INDENT_SIZE.coerceAtLeast(options.INDENT_SIZE.coerceAtLeast(1)),
        )
        // Only apply smart paste when caret is in leading whitespace position of its line
        val caret = editor.caretModel.currentCaret
        val line = doc.getLineNumber(caret.offset.coerceIn(0, doc.textLength))
        if (line < 0 || line >= doc.lineCount) return text
        val lineStart = doc.getLineStartOffset(line)
        val firstNonWs = firstNonWhitespace(doc, lineStart, doc.getLineEndOffset(line))
        if (caret.offset > firstNonWs) return text
        val baseIndent = doc.charsSequence.subSequence(lineStart, caret.offset).toString()
        val reindented = LyngFormatter.reindent(text, cfg)
        // Prefix each non-empty line with base indent to preserve surrounding indentation
        val lines = reindented.split('\n')
        val sb = StringBuilder(reindented.length + lines.size * baseIndent.length)
        for ((idx, ln) in lines.withIndex()) {
            if (ln.isNotEmpty()) sb.append(baseIndent).append(ln) else sb.append(ln)
            if (idx < lines.lastIndex) sb.append('\n')
        }
        return sb.toString()
    }
    private fun firstNonWhitespace(doc: com.intellij.openapi.editor.Document, from: Int, to: Int): Int {
        val seq = doc.charsSequence
        var i = from
        while (i < to) {
            val ch = seq[i]
            if (ch != ' ' && ch != '\t') break
            i++
        }
        return i
    }
 }
@@ -0,0 +1,38 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.editor
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.project.Project
 import com.intellij.psi.PsiDocumentManager
 import com.intellij.psi.PsiFile
 import net.sergeych.lyng.idea.LyngLanguage
 import net.sergeych.lyng.idea.settings.LyngFormatterSettings
 /**
 * Smart Paste helper for Lyng. Not registered as EP yet to keep build stable across IDE SDKs.
 * Use `processOnPasteIfEnabled` from a CopyPastePreProcessor adapter once API signature is finalized.
 */
 object LyngSmartPastePreProcessorHelper {
    fun processOnPasteIfEnabled(project: Project, file: PsiFile, editor: Editor, text: String): String {
        if (file.language != LyngLanguage) return text
        val settings = LyngFormatterSettings.getInstance(project)
        if (!settings.reindentPastedBlocks) return text
        PsiDocumentManager.getInstance(project).commitDocument(editor.document)
        return LyngPastePreProcessor.reindentForPaste(project, editor, file, text)
    }
 }
@@ -0,0 +1,126 @@
 /*
 * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.editor
 import com.intellij.application.options.CodeStyle
 import com.intellij.codeInsight.editorActions.TypedHandlerDelegate
 import com.intellij.openapi.command.WriteCommandAction
 import com.intellij.openapi.diagnostic.Logger
 import com.intellij.openapi.editor.Document
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.util.TextRange
 import com.intellij.psi.PsiDocumentManager
 import com.intellij.psi.PsiFile
 import com.intellij.psi.codeStyle.CodeStyleManager
 import net.sergeych.lyng.format.BraceUtils
 import net.sergeych.lyng.format.LyngFormatConfig
 import net.sergeych.lyng.format.LyngFormatter
 import net.sergeych.lyng.idea.LyngLanguage
 import net.sergeych.lyng.idea.settings.LyngFormatterSettings
 import net.sergeych.lyng.idea.util.FormattingUtils.computeDesiredIndent
 import net.sergeych.lyng.idea.util.FormattingUtils.findFirstNonWs
 class LyngTypedHandler : TypedHandlerDelegate() {
    private val log = Logger.getInstance(LyngTypedHandler::class.java)
    override fun charTyped(c: Char, project: Project, editor: Editor, file: PsiFile): Result {
        if (file.language != LyngLanguage) return Result.CONTINUE
        if (c == '}') {
            val doc = editor.document
            PsiDocumentManager.getInstance(project).commitDocument(doc)
            val offset = editor.caretModel.offset
            val line = doc.getLineNumber((offset - 1).coerceAtLeast(0))
            if (line < 0) return Result.CONTINUE
            val rawLine = doc.getLineText(line)
            val code = rawLine.substringBefore("//").trim()
            if (code == "}") {
                val settings = LyngFormatterSettings.getInstance(project)
                if (settings.reindentClosedBlockOnEnter) {
                    reindentClosedBlockAroundBrace(project, file, doc, line)
                }
                // After block reindent, adjust line indent to what platform thinks (no-op in many cases)
                val lineStart = doc.getLineStartOffset(line)
                CodeStyleManager.getInstance(project).adjustLineIndent(file, lineStart)
            }
        } else if (c == '/') {
            val doc = editor.document
            val offset = editor.caretModel.offset
            if (offset >= 2 && doc.getText(TextRange(offset - 2, offset)) == "*/") {
                PsiDocumentManager.getInstance(project).commitDocument(doc)
                val line = doc.getLineNumber(offset - 1)
                val lineStart = doc.getLineStartOffset(line)
                CodeStyleManager.getInstance(project).adjustLineIndent(file, lineStart)
                // Manual application fallback
                val desired = computeDesiredIndent(project, doc, line)
                val lineEnd = doc.getLineEndOffset(line)
                val firstNonWs = findFirstNonWs(doc, lineStart, lineEnd)
                val currentIndentLen = firstNonWs - lineStart
                if (doc.getText(TextRange(lineStart, lineStart + currentIndentLen)) != desired) {
                    WriteCommandAction.runWriteCommandAction(project) {
                        doc.replaceString(lineStart, lineStart + currentIndentLen, desired)
                    }
                }
            }
        }
        return Result.CONTINUE
    }
    private fun reindentClosedBlockAroundBrace(project: Project, file: PsiFile, doc: Document, braceLine: Int) {
        val braceLineStart = doc.getLineStartOffset(braceLine)
        val braceLineEnd = doc.getLineEndOffset(braceLine)
        val rawBraceLine = doc.getText(TextRange(braceLineStart, braceLineEnd))
        val codeBraceLine = rawBraceLine.substringBefore("//")
        val closeRel = codeBraceLine.lastIndexOf('}')
        if (closeRel < 0) return
        val closeAbs = braceLineStart + closeRel
        val blockRange = BraceUtils.findEnclosingBlockRange(
            doc.charsSequence,
            closeAbs,
            includeTrailingNewline = true
        ) ?: return
        val options = CodeStyle.getIndentOptions(project, doc)
        val cfg = LyngFormatConfig(
            indentSize = options.INDENT_SIZE.coerceAtLeast(1),
            useTabs = options.USE_TAB_CHARACTER,
            continuationIndentSize = options.CONTINUATION_INDENT_SIZE.coerceAtLeast(options.INDENT_SIZE.coerceAtLeast(1)),
        )
        val whole = doc.text
        val updated = LyngFormatter.reindentRange(whole, blockRange, cfg, preserveBaseIndent = true)
        if (updated != whole) {
            WriteCommandAction.runWriteCommandAction(project) {
                doc.replaceString(0, doc.textLength, updated)
            }
            PsiDocumentManager.getInstance(project).commitDocument(doc)
            if (log.isDebugEnabled) log.debug("[LyngTyped] reindented closed block range=$blockRange")
        }
    }
    private fun Document.getLineText(line: Int): String {
        if (line < 0 || line >= lineCount) return ""
        val start = getLineStartOffset(line)
        val end = getLineEndOffset(line)
        return getText(TextRange(start, end))
    }
 }
@@ -0,0 +1,58 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.format
 import com.intellij.formatting.*
 import com.intellij.lang.ASTNode
 import com.intellij.openapi.util.TextRange
 import com.intellij.psi.PsiElement
 import com.intellij.psi.PsiFile
 import com.intellij.psi.codeStyle.CodeStyleSettings
 /**
 * Minimal formatting model: enables Reformat Code to at least re-apply indentation via LineIndentProvider
 * and normalize whitespace. We don’t implement a full PSI-based tree yet; this block treats the whole file
 * as a single formatting region and lets platform query line indents.
 */
 class LyngFormattingModelBuilder : FormattingModelBuilder {
    override fun createModel(element: PsiElement, settings: CodeStyleSettings): FormattingModel {
        val file = element.containingFile
        val rootBlock = LineBlocksRootBlock(file, settings)
        return FormattingModelProvider.createFormattingModelForPsiFile(file, rootBlock, settings)
    }
    override fun getRangeAffectingIndent(file: PsiFile, offset: Int, elementAtOffset: ASTNode?): TextRange? = null
 }
 private class LineBlocksRootBlock(
    private val file: PsiFile,
    private val settings: CodeStyleSettings
 ) : Block {
    override fun getTextRange(): TextRange = file.textRange
    override fun getSubBlocks(): List<Block> = emptyList()
    override fun getWrap(): Wrap? = null
    override fun getIndent(): Indent? = Indent.getNoneIndent()
    override fun getAlignment(): Alignment? = null
    override fun getSpacing(child1: Block?, child2: Block): Spacing? = null
    override fun getChildAttributes(newChildIndex: Int): ChildAttributes = ChildAttributes(Indent.getNoneIndent(), null)
    override fun isIncomplete(): Boolean = false
    override fun isLeaf(): Boolean = false
 }
 // Intentionally no sub-blocks/spacing: indentation is handled by PreFormatProcessor + LineIndentProvider
@@ -0,0 +1,80 @@
 /*
 * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.format
 import com.intellij.application.options.CodeStyle
 import com.intellij.lang.Language
 import com.intellij.openapi.editor.Document
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.util.TextRange
 import com.intellij.psi.PsiDocumentManager
 import com.intellij.psi.codeStyle.CommonCodeStyleSettings.IndentOptions
 import com.intellij.psi.codeStyle.lineIndent.LineIndentProvider
 import net.sergeych.lyng.idea.LyngLanguage
 import net.sergeych.lyng.idea.util.FormattingUtils
 /**
 * Lightweight indentation provider for Lyng.
 *
 * Rules (heuristic, text-based):
 * - New lines after an opening brace/paren increase indent level.
 * - Lines starting with a closing brace/paren decrease indent level by one.
 * - Keeps previous non-empty line's indent as baseline otherwise.
 */
 class LyngLineIndentProvider : LineIndentProvider {
    override fun getLineIndent(project: com.intellij.openapi.project.Project, editor: Editor, language: Language?, offset: Int): String? {
        if (language != null && language != LyngLanguage) return null
        val doc = editor.document
        PsiDocumentManager.getInstance(project).commitDocument(doc)
        val options = CodeStyle.getIndentOptions(project, doc)
        val line = doc.getLineNumberSafe(offset)
        return FormattingUtils.computeDesiredIndent(project, doc, line)
    }
    override fun isSuitableFor(language: Language?): Boolean = language == null || language == LyngLanguage
    private fun Document.getLineNumberSafe(offset: Int): Int =
        getLineNumber(offset.coerceIn(0, textLength))
    private fun Document.getLineText(line: Int): String {
        if (line < 0 || line >= lineCount) return ""
        val start = getLineStartOffset(line)
        val end = getLineEndOffset(line)
        return getText(TextRange(start, end))
    }
    private fun indentUnit(options: IndentOptions): String =
        if (options.USE_TAB_CHARACTER) "\t" else " ".repeat(options.INDENT_SIZE.coerceAtLeast(1))
    private fun indentOfLine(doc: Document, line: Int): String {
        val s = doc.getLineText(line)
        val i = s.indexOfFirst { !it.isWhitespace() }
        return if (i <= 0) s.takeWhile { it == ' ' || it == '\t' } else s.substring(0, i)
    }
    private fun countIndentUnits(indent: String, options: IndentOptions): Int {
        if (indent.isEmpty()) return 0
        if (options.USE_TAB_CHARACTER) return indent.count { it == '\t' }
        val size = options.INDENT_SIZE.coerceAtLeast(1)
        var spaces = 0
        for (ch in indent) spaces += if (ch == '\t') size else 1
        return spaces / size
    }
 }
@@ -0,0 +1,22 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.format
 // Placeholder: we planned a post-format processor fallback, but the 2024.3 platform
 // does not expose the older PostFormatProcessor API in our current dependency set.
 // Reformat Code will use the registered lang.formatter + LineIndentProvider.
 internal object LyngPostFormatProcessorPlaceholder
@@ -0,0 +1,159 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.format
 import com.intellij.application.options.CodeStyle
 import com.intellij.lang.ASTNode
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.util.TextRange
 import com.intellij.psi.codeStyle.CodeStyleManager
 import com.intellij.psi.impl.source.codeStyle.PreFormatProcessor
 import net.sergeych.lyng.format.LyngFormatConfig
 import net.sergeych.lyng.format.LyngFormatter
 import net.sergeych.lyng.idea.LyngLanguage
 /**
 * Idempotent indentation fixer executed by Reformat Code before formatting.
 * It walks all lines in the affected range and applies exact indentation using
 * CodeStyleManager.adjustLineIndent(), which delegates to our LineIndentProvider.
 */
 class LyngPreFormatProcessor : PreFormatProcessor {
    override fun process(element: ASTNode, range: TextRange): TextRange {
        val file = element.psi?.containingFile ?: return range
        if (file.language != LyngLanguage) return range
        val project: Project = file.project
        val doc = file.viewProvider.document ?: return range
        val psiDoc = com.intellij.psi.PsiDocumentManager.getInstance(project)
        val options = CodeStyle.getIndentOptions(project, doc)
        val settings = net.sergeych.lyng.idea.settings.LyngFormatterSettings.getInstance(project)
        // When both spacing and wrapping are OFF, still fix indentation for the whole file to
        // guarantee visible changes on Reformat Code.
        val runFullFileIndent = !settings.enableSpacing && !settings.enableWrapping
        // Maintain a working range and a modification flag to avoid stale offsets after replacements
        var modified = false
        fun fullRange(): TextRange = TextRange(0, doc.textLength)
        var workingRange: TextRange = range.intersection(fullRange()) ?: fullRange()
        val startLine = if (runFullFileIndent) 0 else doc.getLineNumber(workingRange.startOffset)
        val endLine = if (runFullFileIndent) (doc.lineCount - 1).coerceAtLeast(0)
        else doc.getLineNumber(workingRange.endOffset.coerceAtMost(doc.textLength))
        fun codePart(s: String): String {
            val idx = s.indexOf("//")
            return if (idx >= 0) s.substring(0, idx) else s
        }
        // Pre-scan to compute balances up to startLine
        var blockLevel = 0
        var parenBalance = 0
        var bracketBalance = 0
        for (ln in 0 until startLine) {
            val text = doc.getText(TextRange(doc.getLineStartOffset(ln), doc.getLineEndOffset(ln)))
            for (ch in codePart(text)) when (ch) {
                '{' -> blockLevel++
                '}' -> if (blockLevel > 0) blockLevel--
                '(' -> parenBalance++
                ')' -> if (parenBalance > 0) parenBalance--
                '[' -> bracketBalance++
                ']' -> if (bracketBalance > 0) bracketBalance--
            }
        }
        // Re-indent each line deterministically (idempotent). We avoid any content
        // rewriting here to prevent long-running passes or re-entrant formatting.
        for (line in startLine..endLine) {
            val lineStart = doc.getLineStartOffset(line)
            // adjustLineIndent delegates to our LineIndentProvider which computes
            // indentation from scratch; this is safe and idempotent
            CodeStyleManager.getInstance(project).adjustLineIndent(file, lineStart)
            // After indentation, update block/paren/bracket balances using the current line text
            val lineEnd = doc.getLineEndOffset(line)
            val text = doc.getText(TextRange(lineStart, lineEnd))
            val code = codePart(text)
            for (ch in code) when (ch) {
                '{' -> blockLevel++
                '}' -> if (blockLevel > 0) blockLevel--
                '(' -> parenBalance++
                ')' -> if (parenBalance > 0) parenBalance--
                '[' -> bracketBalance++
                ']' -> if (bracketBalance > 0) bracketBalance--
            }
        }
        // If both spacing and wrapping are OFF, explicitly reindent the text using core formatter to
        // guarantee indentation is fixed even when the platform doesn't rewrite whitespace by itself.
        if (!settings.enableSpacing && !settings.enableWrapping) {
            val cfg = LyngFormatConfig(
                indentSize = options.INDENT_SIZE.coerceAtLeast(1),
                useTabs = options.USE_TAB_CHARACTER,
                continuationIndentSize = options.CONTINUATION_INDENT_SIZE.coerceAtLeast(options.INDENT_SIZE.coerceAtLeast(1)),
            )
            val full = fullRange()
            val r = if (runFullFileIndent) full else workingRange.intersection(full) ?: full
            val text = doc.getText(r)
            val formatted = LyngFormatter.reindent(text, cfg)
            if (formatted != text) {
                doc.replaceString(r.startOffset, r.endOffset, formatted)
                modified = true
                psiDoc.commitDocument(doc)
                workingRange = fullRange()
            }
        }
        // Optionally apply spacing using the core formatter if enabled in settings (wrapping stays off)
        if (settings.enableSpacing) {
            val cfg = LyngFormatConfig(
                indentSize = options.INDENT_SIZE.coerceAtLeast(1),
                useTabs = options.USE_TAB_CHARACTER,
                continuationIndentSize = options.CONTINUATION_INDENT_SIZE.coerceAtLeast(options.INDENT_SIZE.coerceAtLeast(1)),
                applySpacing = true,
                applyWrapping = false,
            )
            val safe = workingRange.intersection(fullRange()) ?: fullRange()
            val text = doc.getText(safe)
            val formatted = LyngFormatter.format(text, cfg)
            if (formatted != text) {
                doc.replaceString(safe.startOffset, safe.endOffset, formatted)
                modified = true
                psiDoc.commitDocument(doc)
                workingRange = fullRange()
            }
        }
        // Optionally apply wrapping (after spacing) when enabled
        if (settings.enableWrapping) {
            val cfg = LyngFormatConfig(
                indentSize = options.INDENT_SIZE.coerceAtLeast(1),
                useTabs = options.USE_TAB_CHARACTER,
                continuationIndentSize = options.CONTINUATION_INDENT_SIZE.coerceAtLeast(options.INDENT_SIZE.coerceAtLeast(1)),
                applySpacing = settings.enableSpacing,
                applyWrapping = true,
            )
            val safe2 = workingRange.intersection(fullRange()) ?: fullRange()
            val text2 = doc.getText(safe2)
            val wrapped = LyngFormatter.format(text2, cfg)
            if (wrapped != text2) {
                doc.replaceString(safe2.startOffset, safe2.endOffset, wrapped)
                modified = true
                psiDoc.commitDocument(doc)
                workingRange = fullRange()
            }
        }
        // Return a safe range for the formatter to continue with, preventing stale offsets
        return if (modified) fullRange() else (range.intersection(fullRange()) ?: fullRange())
    }
 }
@@ -0,0 +1,43 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.grazie
 import com.intellij.codeInsight.daemon.DaemonCodeAnalyzer
 import com.intellij.codeInsight.intention.IntentionAction
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.project.Project
 import com.intellij.psi.PsiFile
 import net.sergeych.lyng.idea.settings.LyngFormatterSettings
 /**
 * Lightweight quick-fix that adds a word to the per-project Lyng dictionary.
 */
 class AddToLyngDictionaryFix(private val word: String) : IntentionAction {
    override fun getText(): String = "Add '$word' to Lyng dictionary"
    override fun getFamilyName(): String = "Lyng Spelling"
    override fun isAvailable(project: Project, editor: Editor?, file: PsiFile?): Boolean = word.isNotBlank()
    override fun startInWriteAction(): Boolean = true
    override fun invoke(project: Project, editor: Editor?, file: PsiFile?) {
        val settings = LyngFormatterSettings.getInstance(project)
        val learned = settings.learnedWords
        learned.add(word.lowercase())
        settings.learnedWords = learned
        // Restart daemon to refresh highlights
        if (file != null) DaemonCodeAnalyzer.getInstance(project).restart(file)
    }
 }
@@ -0,0 +1,83 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.grazie
 import com.intellij.openapi.diagnostic.Logger
 import java.io.BufferedReader
 import java.io.InputStreamReader
 import java.util.zip.GZIPInputStream
 /**
 * Very simple English dictionary loader for offline suggestions on IC-243.
 * It loads a word list from classpath resources. Supports plain text (one word per line)
 * and gzipped text if the resource ends with .gz.
 */
 object EnglishDictionary {
    private val log = Logger.getInstance(EnglishDictionary::class.java)
    @Volatile private var loaded = false
    @Volatile private var words: Set<String> = emptySet()
    /**
     * Load dictionary from bundled resources (once).
     * If multiple candidates exist, the first found is used.
     */
    private fun ensureLoaded() {
        if (loaded) return
        synchronized(this) {
            if (loaded) return
            val candidates = listOf(
                // preferred large bundles first (add en-basic.txt.gz ~3–5MB here)
                "/dictionaries/en-basic.txt.gz",
                "/dictionaries/en-large.txt.gz",
                // plain text fallbacks
                "/dictionaries/en-basic.txt",
                "/dictionaries/en-large.txt",
            )
            val merged = HashSet<String>(128_000)
            for (res in candidates) {
                try {
                    val stream = javaClass.getResourceAsStream(res) ?: continue
                    val reader = if (res.endsWith(".gz"))
                        BufferedReader(InputStreamReader(GZIPInputStream(stream)))
                    else
                        BufferedReader(InputStreamReader(stream))
                    var loadedCount = 0
                    reader.useLines { seq -> seq.forEach { line ->
                        val w = line.trim()
                        if (w.isNotEmpty() && !w.startsWith("#")) { merged += w.lowercase(); loadedCount++ }
                    } }
                    log.info("EnglishDictionary: loaded $loadedCount words from $res (total=${merged.size})")
                } catch (t: Throwable) {
                    log.info("EnglishDictionary: failed to load $res: ${t.javaClass.simpleName}: ${t.message}")
                }
            }
            if (merged.isEmpty()) {
                // Fallback minimal set
                merged += setOf("comment","comments","error","errors","found","file","not","word","words","count","value","name","class","function","string")
                log.info("EnglishDictionary: using minimal built-in set (${merged.size})")
            }
            words = merged
            loaded = true
        }
    }
    fun allWords(): Set<String> {
        ensureLoaded()
        return words
    }
 }
@@ -0,0 +1,608 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 /*
 * Grazie-backed annotator for Lyng files.
 *
 * It consumes the MiniAst-driven LyngSpellIndex and, when Grazie is present,
 * tries to run Grazie checks on the extracted TextContent. Results are painted
 * as warnings in the editor. If the Grazie API changes, we use reflection and
 * fail softly with INFO logs (no errors shown to users).
 */
 package net.sergeych.lyng.idea.grazie
 import com.intellij.codeInsight.daemon.DaemonCodeAnalyzer
 import com.intellij.grazie.text.TextContent
 import com.intellij.grazie.text.TextContent.TextDomain
 import com.intellij.ide.plugins.PluginManagerCore
 import com.intellij.lang.annotation.AnnotationHolder
 import com.intellij.lang.annotation.ExternalAnnotator
 import com.intellij.lang.annotation.HighlightSeverity
 import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.diagnostic.Logger
 import com.intellij.openapi.editor.Document
 import com.intellij.openapi.editor.colors.TextAttributesKey
 import com.intellij.openapi.project.DumbAware
 import com.intellij.openapi.util.Key
 import com.intellij.openapi.util.TextRange
 import com.intellij.psi.PsiFile
 import net.sergeych.lyng.idea.settings.LyngFormatterSettings
 import net.sergeych.lyng.idea.spell.LyngSpellIndex
 class LyngGrazieAnnotator : ExternalAnnotator<LyngGrazieAnnotator.Input, LyngGrazieAnnotator.Result>(), DumbAware {
    private val log = Logger.getInstance(LyngGrazieAnnotator::class.java)
    companion object {
        // Cache GrammarChecker availability to avoid repeated reflection + noisy logs
        @Volatile
        private var grammarCheckerAvailable: Boolean? = null
        @Volatile
        private var grammarCheckerMissingLogged: Boolean = false
        private fun isGrammarCheckerKnownMissing(): Boolean = (grammarCheckerAvailable == false)
        private fun markGrammarCheckerMissingOnce(log: Logger, message: String) {
            if (!grammarCheckerMissingLogged) {
                // Downgrade to debug to reduce log noise across projects/sessions
                log.debug(message)
                grammarCheckerMissingLogged = true
            }
        }
        private val RETRY_KEY: Key<Long> = Key.create("LYNG_GRAZIE_ANN_RETRY_STAMP")
    }
    data class Input(val modStamp: Long)
    data class Finding(val range: TextRange, val message: String)
    data class Result(val modStamp: Long, val findings: List<Finding>)
    override fun collectInformation(file: PsiFile): Input? {
        val doc: Document = file.viewProvider.document ?: return null
        // Only require Grazie presence; index readiness is checked in apply with a retry.
        val grazie = isGrazieInstalled()
        if (!grazie) {
            log.info("LyngGrazieAnnotator.collectInformation: skip (grazie=false) file='${file.name}'")
            return null
        }
        log.info("LyngGrazieAnnotator.collectInformation: file='${file.name}', modStamp=${doc.modificationStamp}")
        return Input(doc.modificationStamp)
    }
    override fun doAnnotate(collectedInfo: Input?): Result? {
        // All heavy lifting is done in apply where we have the file context
        return collectedInfo?.let { Result(it.modStamp, emptyList()) }
    }
    override fun apply(file: PsiFile, annotationResult: Result?, holder: AnnotationHolder) {
        if (annotationResult == null || !isGrazieInstalled()) return
        val doc = file.viewProvider.document ?: return
        val idx = LyngSpellIndex.getUpToDate(file) ?: run {
            log.info("LyngGrazieAnnotator.apply: index not ready for '${file.name}', scheduling one-shot restart")
            scheduleOneShotRestart(file, annotationResult.modStamp)
            return
        }
        val settings = LyngFormatterSettings.getInstance(file.project)
        // Build TextContent fragments for comments/strings/identifiers according to settings
        val fragments = mutableListOf<Pair<TextContent, TextRange>>()
        try {
            fun addFragments(ranges: List<TextRange>, domain: TextDomain) {
                for (r in ranges) {
                    val local = rangeToTextContent(file, domain, r) ?: continue
                    fragments += local to r
                }
            }
            // Comments always via COMMENTS
            addFragments(idx.comments, TextDomain.COMMENTS)
            // Strings: LITERALS if requested, else COMMENTS if fallback enabled
            if (settings.spellCheckStringLiterals) {
                val domain = if (settings.grazieTreatLiteralsAsComments) TextDomain.COMMENTS else TextDomain.LITERALS
                addFragments(idx.strings, domain)
            }
            // Identifiers via COMMENTS to force painting in 243 unless user disables fallback
            val idsDomain = if (settings.grazieTreatIdentifiersAsComments) TextDomain.COMMENTS else TextDomain.DOCUMENTATION
            addFragments(idx.identifiers, idsDomain)
            log.info(
                "LyngGrazieAnnotator.apply: file='${file.name}', idxCounts ids=${idx.identifiers.size}, comments=${idx.comments.size}, strings=${idx.strings.size}, builtFragments=${fragments.size}"
            )
        } catch (e: Throwable) {
            log.info("LyngGrazieAnnotator: failed to build TextContent fragments: ${e.javaClass.simpleName}: ${e.message}")
            return
        }
        if (fragments.isEmpty()) return
        val findings = mutableListOf<Finding>()
        var totalReturned = 0
        var chosenEntry: String? = null
        for ((content, hostRange) in fragments) {
            try {
                val (typos, entryNote) = runGrazieChecksWithTracing(file, content)
                if (chosenEntry == null) chosenEntry = entryNote
                if (typos != null) {
                    totalReturned += typos.size
                    for (t in typos) {
                        val rel = extractRangeFromTypo(t) ?: continue
                        // Map relative range inside fragment to host file range
                        val abs = TextRange(hostRange.startOffset + rel.startOffset, hostRange.startOffset + rel.endOffset)
                        findings += Finding(abs, extractMessageFromTypo(t) ?: "Spelling/Grammar")
                    }
                }
            } catch (e: Throwable) {
                log.info("LyngGrazieAnnotator: Grazie check failed: ${e.javaClass.simpleName}: ${e.message}")
            }
        }
        log.info("LyngGrazieAnnotator.apply: used=${chosenEntry ?: "<none>"}, totalFindings=$totalReturned, painting=${findings.size}")
        // IMPORTANT: Do NOT fallback to the tiny bundled vocabulary on modern IDEs.
        // If Grazie/Natural Languages processing returned nothing, we simply exit here
        // to avoid low‑quality results from the legacy dictionary.
        if (findings.isEmpty()) return
        for (f in findings) {
            val ab = holder.newAnnotation(HighlightSeverity.INFORMATION, f.message).range(f.range)
            applyTypoStyleIfRequested(file, ab)
            ab.create()
        }
    }
    private fun scheduleOneShotRestart(file: PsiFile, modStamp: Long) {
        try {
            val last = file.getUserData(RETRY_KEY)
            if (last == modStamp) {
                log.info("LyngGrazieAnnotator.restart: already retried for modStamp=$modStamp, skip")
                return
            }
            file.putUserData(RETRY_KEY, modStamp)
            ApplicationManager.getApplication().invokeLater({
                try {
                    DaemonCodeAnalyzer.getInstance(file.project).restart(file)
                    log.info("LyngGrazieAnnotator.restart: daemon restarted for '${file.name}'")
                } catch (e: Throwable) {
                    log.info("LyngGrazieAnnotator.restart failed: ${e.javaClass.simpleName}: ${e.message}")
                }
            })
        } catch (e: Throwable) {
            log.info("LyngGrazieAnnotator.scheduleOneShotRestart failed: ${e.javaClass.simpleName}: ${e.message}")
        }
    }
    private fun isGrazieInstalled(): Boolean {
        return PluginManagerCore.isPluginInstalled(com.intellij.openapi.extensions.PluginId.getId("com.intellij.grazie")) ||
                PluginManagerCore.isPluginInstalled(com.intellij.openapi.extensions.PluginId.getId("tanvd.grazi"))
    }
    private fun rangeToTextContent(file: PsiFile, domain: TextDomain, range: TextRange): TextContent? {
        // Build TextContent via reflection: prefer psiFragment(domain, element)
        return try {
            // Try to find an element that fully covers the target range
            var element = file.findElementAt(range.startOffset) ?: return null
            val start = range.startOffset
            val end = range.endOffset
            while (element.parent != null && (element.textRange.startOffset > start || element.textRange.endOffset < end)) {
                element = element.parent
            }
            if (element.textRange.startOffset > start || element.textRange.endOffset < end) return null
            // In many cases, the element may not span the whole range; use file + range via suitable factory
            val methods = TextContent::class.java.methods.filter { it.name == "psiFragment" }
            val byElementDomain = methods.firstOrNull { it.parameterCount == 2 && it.parameterTypes[0].name.endsWith("PsiElement") }
            if (byElementDomain != null) {
                @Suppress("UNCHECKED_CAST")
                return (byElementDomain.invoke(null, element, domain) as? TextContent)?.let { tc ->
                    val relStart = start - element.textRange.startOffset
                    val relEnd = end - element.textRange.startOffset
                    if (relStart < 0 || relEnd > tc.length || relStart >= relEnd) return null
                    tc.subText(TextRange(relStart, relEnd))
                }
            }
            val byDomainElement = methods.firstOrNull { it.parameterCount == 2 && it.parameterTypes[0].name.endsWith("TextDomain") }
            if (byDomainElement != null) {
                @Suppress("UNCHECKED_CAST")
                return (byDomainElement.invoke(null, domain, element) as? TextContent)?.let { tc ->
                    val relStart = start - element.textRange.startOffset
                    val relEnd = end - element.textRange.startOffset
                    if (relStart < 0 || relEnd > tc.length || relStart >= relEnd) return null
                    tc.subText(TextRange(relStart, relEnd))
                }
            }
            null
        } catch (e: Throwable) {
            log.info("LyngGrazieAnnotator: rangeToTextContent failed: ${e.javaClass.simpleName}: ${e.message}")
            null
        }
    }
    private fun runGrazieChecksWithTracing(file: PsiFile, content: TextContent): Pair<Collection<Any>?, String?> {
        // Try known entry points via reflection to avoid hard dependencies on Grazie internals
        if (isGrammarCheckerKnownMissing()) return null to null
        try {
            // 1) Static GrammarChecker.check(TextContent)
            val checkerCls = try {
                Class.forName("com.intellij.grazie.grammar.GrammarChecker").also { grammarCheckerAvailable = true }
            } catch (t: Throwable) {
                grammarCheckerAvailable = false
                markGrammarCheckerMissingOnce(log, "LyngGrazieAnnotator: GrammarChecker class not found: ${t.javaClass.simpleName}: ${t.message}")
                null
            }
            if (checkerCls != null) {
                // Diagnostic: list available 'check' methods once
                runCatching {
                    val checks = checkerCls.methods.filter { it.name == "check" }
                    val sig = checks.joinToString { m ->
                        val params = m.parameterTypes.joinToString(prefix = "(", postfix = ")") { it.simpleName }
                        "${m.name}$params static=${java.lang.reflect.Modifier.isStatic(m.modifiers)}"
                    }
                    log.info("LyngGrazieAnnotator: GrammarChecker.check candidates: ${if (sig.isEmpty()) "<none>" else sig}")
                }
                checkerCls.methods.firstOrNull { it.name == "check" && it.parameterCount == 1 && it.parameterTypes[0].name.endsWith("TextContent") }?.let { m ->
                    @Suppress("UNCHECKED_CAST")
                    val res = m.invoke(null, content) as? Collection<Any>
                    return res to "GrammarChecker.check(TextContent) static"
                }
                // 2) GrammarChecker.getInstance().check(TextContent)
                val getInstance = checkerCls.methods.firstOrNull { it.name == "getInstance" && it.parameterCount == 0 }
                val inst = getInstance?.invoke(null)
                if (inst != null) {
                    val m = checkerCls.methods.firstOrNull { it.name == "check" && it.parameterCount == 1 && it.parameterTypes[0].name.endsWith("TextContent") }
                    if (m != null) {
                        @Suppress("UNCHECKED_CAST")
                        val res = m.invoke(inst, content) as? Collection<Any>
                        return res to "GrammarChecker.getInstance().check(TextContent)"
                    }
                }
                // 3) GrammarChecker.getDefault().check(TextContent)
                val getDefault = checkerCls.methods.firstOrNull { it.name == "getDefault" && it.parameterCount == 0 }
                val def = getDefault?.invoke(null)
                if (def != null) {
                    val m = checkerCls.methods.firstOrNull { it.name == "check" && it.parameterCount == 1 && it.parameterTypes[0].name.endsWith("TextContent") }
                    if (m != null) {
                        @Suppress("UNCHECKED_CAST")
                        val res = m.invoke(def, content) as? Collection<Any>
                        return res to "GrammarChecker.getDefault().check(TextContent)"
                    }
                }
                // 4) Service from project/application: GrammarChecker as a service
                runCatching {
                    val app = com.intellij.openapi.application.ApplicationManager.getApplication()
                    val getService = app::class.java.methods.firstOrNull { it.name == "getService" && it.parameterCount == 1 }
                    val svc = getService?.invoke(app, checkerCls)
                    if (svc != null) {
                        val m = checkerCls.methods.firstOrNull { it.name == "check" && it.parameterCount == 1 && it.parameterTypes[0].name.endsWith("TextContent") }
                        if (m != null) {
                            @Suppress("UNCHECKED_CAST")
                            val res = m.invoke(svc, content) as? Collection<Any>
                            if (res != null) return res to "Application.getService(GrammarChecker).check(TextContent)"
                        }
                    }
                }
                runCatching {
                    val getService = file.project::class.java.methods.firstOrNull { it.name == "getService" && it.parameterCount == 1 }
                    val svc = getService?.invoke(file.project, checkerCls)
                    if (svc != null) {
                        val m = checkerCls.methods.firstOrNull { it.name == "check" && it.parameterCount == 1 && it.parameterTypes[0].name.endsWith("TextContent") }
                        if (m != null) {
                            @Suppress("UNCHECKED_CAST")
                            val res = m.invoke(svc, content) as? Collection<Any>
                            if (res != null) return res to "Project.getService(GrammarChecker).check(TextContent)"
                        }
                    }
                }
            }
            // 5) Fallback: search any public method named check that accepts TextContent in any Grazie class (static)
            val candidateClasses = listOf(
                "com.intellij.grazie.grammar.GrammarChecker",
                "com.intellij.grazie.grammar.GrammarRunner",
                "com.intellij.grazie.grammar.Grammar" // historical names
            )
            for (cn in candidateClasses) {
                val cls = try { Class.forName(cn) } catch (_: Throwable) { continue }
                val m = cls.methods.firstOrNull { it.name == "check" && it.parameterTypes.any { p -> p.name.endsWith("TextContent") } }
                if (m != null) {
                    val args = arrayOfNulls<Any>(m.parameterCount)
                    // place content to the first TextContent parameter; others left null (common defaults)
                    for (i in 0 until m.parameterCount) if (m.parameterTypes[i].name.endsWith("TextContent")) { args[i] = content; break }
                    @Suppress("UNCHECKED_CAST")
                    val res = m.invoke(null, *args) as? Collection<Any>
                    if (res != null) return res to "$cn.${m.name}(TextContent)"
                }
            }
            // 6) Kotlin top-level function: GrammarCheckerKt.check(TextContent)
            runCatching {
                val kt = Class.forName("com.intellij.grazie.grammar.GrammarCheckerKt")
                val m = kt.methods.firstOrNull { it.name == "check" && it.parameterTypes.any { p -> p.name.endsWith("TextContent") } }
                if (m != null) {
                    val args = arrayOfNulls<Any>(m.parameterCount)
                    for (i in 0 until m.parameterCount) if (m.parameterTypes[i].name.endsWith("TextContent")) { args[i] = content; break }
                    @Suppress("UNCHECKED_CAST")
                    val res = m.invoke(null, *args) as? Collection<Any>
                    if (res != null) return res to "GrammarCheckerKt.check(TextContent)"
                }
            }
        } catch (e: Throwable) {
            log.info("LyngGrazieAnnotator: runGrazieChecks reflection failed: ${e.javaClass.simpleName}: ${e.message}")
        }
        return null to null
    }
    private fun extractRangeFromTypo(typo: Any): TextRange? {
        // Try to get a relative range from returned Grazie issue/typo via common accessors
        return try {
            // Common getters
            val m1 = typo.javaClass.methods.firstOrNull { it.name == "getRange" && it.parameterCount == 0 }
            val r1 = if (m1 != null) m1.invoke(typo) else null
            when (r1) {
                is TextRange -> return r1
                is IntRange -> return TextRange(r1.first, r1.last + 1)
            }
            val m2 = typo.javaClass.methods.firstOrNull { it.name == "getHighlightRange" && it.parameterCount == 0 }
            val r2 = if (m2 != null) m2.invoke(typo) else null
            when (r2) {
                is TextRange -> return r2
                is IntRange -> return TextRange(r2.first, r2.last + 1)
            }
            // Separate from/to ints
            val fromM = typo.javaClass.methods.firstOrNull { it.name == "getFrom" && it.parameterCount == 0 && it.returnType == Int::class.javaPrimitiveType }
            val toM = typo.javaClass.methods.firstOrNull { it.name == "getTo" && it.parameterCount == 0 && it.returnType == Int::class.javaPrimitiveType }
            if (fromM != null && toM != null) {
                val s = (fromM.invoke(typo) as? Int) ?: return null
                val e = (toM.invoke(typo) as? Int) ?: return null
                if (e > s) return TextRange(s, e)
            }
            null
        } catch (_: Throwable) { null }
    }
    private fun extractMessageFromTypo(typo: Any): String? {
        return try {
            val m = typo.javaClass.methods.firstOrNull { it.name == "getMessage" && it.parameterCount == 0 }
            (m?.invoke(typo) as? String)
        } catch (_: Throwable) { null }
    }
    // Fallback that uses legacy SpellCheckerManager (if present) via reflection to validate words in fragments.
    // Returns number of warnings painted.
    private fun fallbackWithLegacySpellcheckerIfAvailable(
        file: PsiFile,
        fragments: List<Pair<TextContent, TextRange>>,
        holder: AnnotationHolder
    ): Int {
        return try {
            val mgrCls = Class.forName("com.intellij.spellchecker.SpellCheckerManager")
            val getInstance = mgrCls.methods.firstOrNull { it.name == "getInstance" && it.parameterCount == 1 }
            val isCorrect = mgrCls.methods.firstOrNull { it.name == "isCorrect" && it.parameterCount == 1 && it.parameterTypes[0] == String::class.java }
            if (getInstance == null || isCorrect == null) {
                // No legacy spellchecker API available — fall back to naive painter
                return naiveFallbackPaint(file, fragments, holder)
            }
            val mgr = getInstance.invoke(null, file.project)
            if (mgr == null) {
                // Legacy manager not present for this project — use naive fallback
                return naiveFallbackPaint(file, fragments, holder)
            }
            var painted = 0
            val docText = file.viewProvider.document?.text ?: return 0
            val tokenRegex = Regex("[A-Za-z][A-Za-z0-9_']{2,}")
            for ((content, hostRange) in fragments) {
                val text = try { docText.substring(hostRange.startOffset, hostRange.endOffset) } catch (_: Throwable) { null } ?: continue
                var seen = 0
                var flagged = 0
                for (m in tokenRegex.findAll(text)) {
                    val token = m.value
                    if ('%' in token) continue // skip printf fragments defensively
                    // Split snake_case and camelCase within the token
                    val parts = splitIdentifier(token)
                    for (part in parts) {
                        if (part.length <= 2) continue
                        if (isAllowedWord(part)) continue
                        // Quick allowlist for very common words to reduce noise if dictionaries differ
                        val ok = try { isCorrect.invoke(mgr, part) as? Boolean } catch (_: Throwable) { null }
                        if (ok == false) {
                            // Map part back to original token occurrence within this hostRange
                            val localStart = m.range.first + token.indexOf(part)
                            val localEnd = localStart + part.length
                            val abs = TextRange(hostRange.startOffset + localStart, hostRange.startOffset + localEnd)
                            paintTypoAnnotation(file, holder, abs, part)
                            painted++
                            flagged++
                        }
                        seen++
                    }
                }
                log.info("LyngGrazieAnnotator.fallback: fragment words=$seen, flagged=$flagged")
            }
            painted
        } catch (_: Throwable) {
            // If legacy manager is not available, fall back to a very naive heuristic (no external deps)
            return naiveFallbackPaint(file, fragments, holder)
        }
    }
    private fun naiveFallbackPaint(
        file: PsiFile,
        fragments: List<Pair<TextContent, TextRange>>,
        holder: AnnotationHolder
    ): Int {
        var painted = 0
        val docText = file.viewProvider.document?.text
        val tokenRegex = Regex("[A-Za-z][A-Za-z0-9_']{2,}")
        val baseWords = setOf(
            // small, common vocabulary to catch near-miss typos in typical code/comments
            "comment","comments","error","errors","found","file","not","word","words","count","value","name","class","function","string"
        )
        for ((content, hostRange) in fragments) {
            val text: String? = docText?.let { dt ->
                try { dt.substring(hostRange.startOffset, hostRange.endOffset) } catch (_: Throwable) { null }
            }
            if (text.isNullOrBlank()) continue
            var seen = 0
            var flagged = 0
            for (m in tokenRegex.findAll(text)) {
                val token = m.value
                if ('%' in token) continue
                val parts = splitIdentifier(token)
                for (part in parts) {
                    seen++
                    val lower = part.lowercase()
                    if (lower.length <= 2 || isAllowedWord(part)) continue
                    // Heuristic: no vowels OR 3 repeated chars OR ends with unlikely double consonants
                    val noVowel = lower.none { it in "aeiouy" }
                    val triple = Regex("(.)\\1\\1").containsMatchIn(lower)
                    val dblCons = Regex("[bcdfghjklmnpqrstvwxyz]{2}$").containsMatchIn(lower)
                    var looksWrong = noVowel || triple || dblCons
                    // Additional: low vowel ratio for length>=4
                    if (!looksWrong && lower.length >= 4) {
                        val vowels = lower.count { it in "aeiouy" }
                        val ratio = if (lower.isNotEmpty()) vowels.toDouble() / lower.length else 1.0
                        if (ratio < 0.25) looksWrong = true
                    }
                    // Additional: near-miss to a small base vocabulary (edit distance 1, or 2 for words >=6)
                    if (!looksWrong) {
                        for (bw in baseWords) {
                            val d = editDistance(lower, bw)
                            if (d == 1 || (d == 2 && lower.length >= 6)) { looksWrong = true; break }
                        }
                    }
                    if (looksWrong) {
                        val localStart = m.range.first + token.indexOf(part)
                        val localEnd = localStart + part.length
                        val abs = TextRange(hostRange.startOffset + localStart, hostRange.startOffset + localEnd)
                        paintTypoAnnotation(file, holder, abs, part)
                        painted++
                        flagged++
                    }
                }
            }
            log.info("LyngGrazieAnnotator.fallback(naive): fragment words=$seen, flagged=$flagged")
        }
        return painted
    }
    private fun paintTypoAnnotation(file: PsiFile, holder: AnnotationHolder, range: TextRange, word: String) {
        val settings = LyngFormatterSettings.getInstance(file.project)
        val ab = holder.newAnnotation(HighlightSeverity.INFORMATION, "Possible typo")
            .range(range)
        applyTypoStyleIfRequested(file, ab)
        if (settings.offerLyngTypoQuickFixes) {
            // Offer lightweight fixes; for 243 provide Add-to-dictionary always
            ab.withFix(net.sergeych.lyng.idea.grazie.AddToLyngDictionaryFix(word))
            // Offer "Replace with…" candidates (top 7)
            val cands = suggestReplacements(file, word).take(7)
            for (c in cands) {
                ab.withFix(net.sergeych.lyng.idea.grazie.ReplaceWordFix(range, word, c))
            }
        }
        ab.create()
    }
    private fun applyTypoStyleIfRequested(file: PsiFile, ab: com.intellij.lang.annotation.AnnotationBuilder) {
        val settings = LyngFormatterSettings.getInstance(file.project)
        if (!settings.showTyposWithGreenUnderline) return
        // Use the standard TYPO text attributes key used by the platform
        val TYPO: TextAttributesKey = TextAttributesKey.createTextAttributesKey("TYPO")
        try {
            ab.textAttributes(TYPO)
        } catch (_: Throwable) {
            // some IDEs may not allow setting attributes on INFORMATION; ignore gracefully
        }
    }
    private fun suggestReplacements(file: PsiFile, word: String): List<String> {
        val lower = word.lowercase()
        val fromProject = collectProjectWords(file)
        val fromTech = TechDictionary.allWords()
        val fromEnglish = EnglishDictionary.allWords()
        // Merge with priority: project (p=0), tech (p=1), english (p=2)
        val all = LinkedHashSet<String>()
        all.addAll(fromProject)
        all.addAll(fromTech)
        all.addAll(fromEnglish)
        data class Cand(val w: String, val d: Int, val p: Int)
        val cands = ArrayList<Cand>(32)
        for (w in all) {
            if (w == lower) continue
            if (kotlin.math.abs(w.length - lower.length) > 2) continue
            val d = editDistance(lower, w)
            val p = when {
                w in fromProject -> 0
                w in fromTech -> 1
                else -> 2
            }
            cands += Cand(w, d, p)
        }
        cands.sortWith(compareBy<Cand> { it.d }.thenBy { it.p }.thenBy { it.w })
        // Return a larger pool so callers can choose desired display count
        return cands.take(16).map { it.w }
    }
    private fun collectProjectWords(file: PsiFile): Set<String> {
        // Simple approach: use current file text; can be extended to project scanning later
        val text = file.viewProvider.document?.text ?: return emptySet()
        val out = LinkedHashSet<String>()
        val tokenRegex = Regex("[A-Za-z][A-Za-z0-9_']{2,}")
        for (m in tokenRegex.findAll(text)) {
            val parts = splitIdentifier(m.value)
            parts.forEach { out += it.lowercase() }
        }
        // Include learned words
        val settings = LyngFormatterSettings.getInstance(file.project)
        out.addAll(settings.learnedWords.map { it.lowercase() })
        return out
    }
    private fun splitIdentifier(token: String): List<String> {
        // Split on underscores and camelCase boundaries
        val unders = token.split('_').filter { it.isNotBlank() }
        val out = mutableListOf<String>()
        val camelBoundary = Regex("(?<=[a-z])(?=[A-Z])")
        for (u in unders) out += u.split(camelBoundary).filter { it.isNotBlank() }
        return out
    }
    private fun isAllowedWord(w: String): Boolean {
        val s = w.lowercase()
        return s in setOf(
            // common code words / language keywords to avoid noise
            "val","var","fun","class","enum","type","import","package","return","if","else","when","while","for","try","catch","finally","true","false","null",
            // very common English words
            "the","and","or","not","with","from","into","this","that","file","found","count","name","value","object"
        )
    }
    private fun editDistance(a: String, b: String): Int {
        if (a == b) return 0
        if (a.isEmpty()) return b.length
        if (b.isEmpty()) return a.length
        val dp = IntArray(b.length + 1) { it }
        for (i in 1..a.length) {
            var prev = dp[0]
            dp[0] = i
            for (j in 1..b.length) {
                val temp = dp[j]
                dp[j] = minOf(
                    dp[j] + 1,                // deletion
                    dp[j - 1] + 1,            // insertion
                    prev + if (a[i - 1] == b[j - 1]) 0 else 1 // substitution
                )
                prev = temp
            }
        }
        return dp[b.length]
    }
 }
@@ -0,0 +1,139 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.grazie
 import com.intellij.grazie.grammar.strategy.GrammarCheckingStrategy
 import com.intellij.grazie.grammar.strategy.GrammarCheckingStrategy.TextDomain
 import com.intellij.ide.plugins.PluginManagerCore
 import com.intellij.openapi.diagnostic.Logger
 import com.intellij.openapi.extensions.PluginId
 import com.intellij.openapi.util.TextRange
 import com.intellij.psi.PsiElement
 import net.sergeych.lyng.idea.highlight.LyngTokenTypes
 import net.sergeych.lyng.idea.settings.LyngFormatterSettings
 import net.sergeych.lyng.idea.spell.LyngSpellIndex
 /**
 * Grazie/Natural Languages strategy for Lyng.
 *
 * - Comments: checked as natural language (TextDomain.COMMENTS)
 * - String literals: optionally checked (setting), skipping printf-like specifiers via stealth ranges (TextDomain.LITERALS)
 * - Identifiers (non-keywords): checked under TextDomain.CODE so "Process code" controls apply
 * - Keywords: skipped
 */
 class LyngGrazieStrategy : GrammarCheckingStrategy {
    private val log = Logger.getInstance(LyngGrazieStrategy::class.java)
    @Volatile private var loggedOnce = false
    @Volatile private var loggedFirstMatch = false
    private val seenTypes: MutableSet<String> = java.util.Collections.synchronizedSet(mutableSetOf())
    private fun legacySpellcheckerInstalled(): Boolean =
        PluginManagerCore.isPluginInstalled(PluginId.getId("com.intellij.spellchecker"))
    // Regex for printf-style specifiers: %[flags][width][.precision][length]type
    private val spec = Regex("%(?:[-+ #0]*(?:\\d+)?(?:\\.\\d+)?[a-zA-Z%])")
    override fun isMyContextRoot(element: PsiElement): Boolean {
        val type = element.node?.elementType
        val settings = LyngFormatterSettings.getInstance(element.project)
        val legacyPresent = legacySpellcheckerInstalled()
        if (type != null && seenTypes.size < 10) {
            val name = type.toString()
            if (seenTypes.add(name)) {
                log.info("LyngGrazieStrategy: saw PSI type=$name")
            }
        }
        if (!loggedOnce) {
            loggedOnce = true
            log.info("LyngGrazieStrategy activated: legacyPresent=$legacyPresent, preferGrazieForCommentsAndLiterals=${settings.preferGrazieForCommentsAndLiterals}, spellCheckStringLiterals=${settings.spellCheckStringLiterals}, grazieChecksIdentifiers=${settings.grazieChecksIdentifiers}")
        }
        val file = element.containingFile ?: return false
        val index = LyngSpellIndex.getUpToDate(file) ?: return false // Suspend until ready
        // To ensure Grazie asks TextExtractor for all leafs, accept any Lyng element once index is ready.
        // The extractor will decide per-range/domain what to actually provide.
        if (!loggedFirstMatch) {
            loggedFirstMatch = true
            log.info("LyngGrazieStrategy: enabling Grazie on all Lyng elements (index ready)")
        }
        return true
    }
    override fun getContextRootTextDomain(root: PsiElement): TextDomain {
        val type = root.node?.elementType
        val settings = LyngFormatterSettings.getInstance(root.project)
        val file = root.containingFile
        val index = if (file != null) LyngSpellIndex.getUpToDate(file) else null
        val r = root.textRange
        fun overlaps(list: List<TextRange>): Boolean = r != null && list.any { it.intersects(r) }
        return when (type) {
            LyngTokenTypes.LINE_COMMENT, LyngTokenTypes.BLOCK_COMMENT -> TextDomain.COMMENTS
            LyngTokenTypes.STRING -> if (settings.grazieTreatLiteralsAsComments) TextDomain.COMMENTS else TextDomain.LITERALS
            LyngTokenTypes.IDENTIFIER -> {
                // For Grazie-only reliability in 243, route identifiers via COMMENTS when configured
                if (settings.grazieTreatIdentifiersAsComments && index != null && r != null && overlaps(index.identifiers))
                    TextDomain.COMMENTS
                else TextDomain.PLAIN_TEXT
            }
            else -> TextDomain.PLAIN_TEXT
        }
    }
    // Note: do not override getLanguageSupport to keep compatibility with 243 API
    override fun getStealthyRanges(root: PsiElement, text: CharSequence): java.util.LinkedHashSet<IntRange> {
        val result = LinkedHashSet<IntRange>()
        val type = root.node?.elementType
        if (type == LyngTokenTypes.STRING) {
            if (!shouldCheckLiterals(root)) {
                // Hide the entire string when literals checking is disabled by settings
                result += (0 until text.length)
                return result
            }
            // Hide printf-like specifiers in strings
            val (start, end) = stripQuotesBounds(text)
            if (end > start) {
                val content = text.subSequence(start, end)
                for (m in spec.findAll(content)) {
                    val ms = start + m.range.first
                    val me = start + m.range.last
                    result += (ms..me)
                }
                if (result.isNotEmpty()) {
                    log.debug("LyngGrazieStrategy: hidden ${result.size} printf specifier ranges in string literal")
                }
            }
        }
        return result
    }
    override fun isEnabledByDefault(): Boolean = true
    private fun shouldCheckLiterals(root: PsiElement): Boolean =
        LyngFormatterSettings.getInstance(root.project).spellCheckStringLiterals
    private fun stripQuotesBounds(text: CharSequence): Pair<Int, Int> {
        if (text.length < 2) return 0 to text.length
        val first = text.first()
        val last = text.last()
        return if ((first == '"' && last == '"') || (first == '\'' && last == '\''))
            1 to (text.length - 1) else (0 to text.length)
    }
 }
@@ -0,0 +1,104 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.grazie
 import com.intellij.grazie.text.TextContent
 import com.intellij.grazie.text.TextContent.TextDomain
 import com.intellij.grazie.text.TextExtractor
 import com.intellij.openapi.diagnostic.Logger
 import com.intellij.psi.PsiElement
 import net.sergeych.lyng.idea.highlight.LyngTokenTypes
 import net.sergeych.lyng.idea.settings.LyngFormatterSettings
 import net.sergeych.lyng.idea.spell.LyngSpellIndex
 /**
 * Provides Grazie with extractable text for Lyng PSI elements.
 * We return text for identifiers, comments, and (optionally) string literals.
 * printf-like specifiers are filtered by the Grammar strategy via stealth ranges.
 */
 class LyngTextExtractor : TextExtractor() {
    private val log = Logger.getInstance(LyngTextExtractor::class.java)
    @Volatile private var loggedOnce = false
    private val seen: MutableSet<String> = java.util.Collections.synchronizedSet(mutableSetOf())
    override fun buildTextContent(element: PsiElement, allowedDomains: Set<TextDomain>): TextContent? {
        val type = element.node?.elementType ?: return null
        if (!loggedOnce) {
            loggedOnce = true
            log.info("LyngTextExtractor active; allowedDomains=${allowedDomains.joinToString()}")
        }
        val settings = LyngFormatterSettings.getInstance(element.project)
        val file = element.containingFile
        val index = if (file != null) LyngSpellIndex.getUpToDate(file) else null
        val r = element.textRange
        fun overlaps(list: List<com.intellij.openapi.util.TextRange>): Boolean = r != null && list.any { it.intersects(r) }
        // Decide target domain by intersection with our MiniAst-driven index; prefer comments > strings > identifiers
        var domain: TextDomain? = null
        if (index != null && r != null) {
            if (overlaps(index.comments)) domain = TextDomain.COMMENTS
            else if (overlaps(index.strings) && settings.spellCheckStringLiterals) domain = TextDomain.LITERALS
            else if (overlaps(index.identifiers)) domain = if (settings.grazieTreatIdentifiersAsComments) TextDomain.COMMENTS else TextDomain.DOCUMENTATION
        } else {
            // Fallback to token type if index is not ready (rare timing), mostly for comments
            domain = when (type) {
                LyngTokenTypes.LINE_COMMENT, LyngTokenTypes.BLOCK_COMMENT -> TextDomain.COMMENTS
                else -> null
            }
        }
        if (domain == null) return null
        // If literals aren't requested but fallback is enabled, route strings as COMMENTS
        if (domain == TextDomain.LITERALS && !allowedDomains.contains(TextDomain.LITERALS) && settings.grazieTreatLiteralsAsComments) {
            domain = TextDomain.COMMENTS
        }
        if (!allowedDomains.contains(domain)) {
            if (seen.add("deny-${domain.name}")) {
                log.info("LyngTextExtractor: domain ${domain.name} not in allowedDomains; skipping")
            }
            return null
        }
        return try {
            // Try common factory names across versions
            val methods = TextContent::class.java.methods.filter { it.name == "psiFragment" }
            val built: TextContent? = when {
                // Try psiFragment(PsiElement, TextDomain)
                methods.any { it.parameterCount == 2 && it.parameterTypes[0].name.contains("PsiElement") } -> {
                    val m = methods.first { it.parameterCount == 2 && it.parameterTypes[0].name.contains("PsiElement") }
                    @Suppress("UNCHECKED_CAST")
                    (m.invoke(null, element, domain) as? TextContent)?.also {
                        if (seen.add("ok-${domain.name}")) log.info("LyngTextExtractor: provided ${domain.name} for ${type} via psiFragment(element, domain)")
                    }
                }
                // Try psiFragment(TextDomain, PsiElement)
                methods.any { it.parameterCount == 2 && it.parameterTypes[0].name.endsWith("TextDomain") } -> {
                    val m = methods.first { it.parameterCount == 2 && it.parameterTypes[0].name.endsWith("TextDomain") }
                    @Suppress("UNCHECKED_CAST")
                    (m.invoke(null, domain, element) as? TextContent)?.also {
                        if (seen.add("ok-${domain.name}")) log.info("LyngTextExtractor: provided ${domain.name} for ${type} via psiFragment(domain, element)")
                    }
                }
                else -> null
            }
            built
        } catch (e: Throwable) {
            log.info("LyngTextExtractor: failed to build TextContent: ${e.javaClass.simpleName}: ${e.message}")
            null
        }
    }
 }
@@ -0,0 +1,86 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.grazie
 import com.intellij.codeInsight.daemon.DaemonCodeAnalyzer
 import com.intellij.codeInsight.intention.IntentionAction
 import com.intellij.openapi.command.WriteCommandAction
 import com.intellij.openapi.editor.CaretModel
 import com.intellij.openapi.editor.Document
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.util.TextRange
 import com.intellij.psi.PsiFile
 /**
 * Lightweight quick-fix to replace a misspelled word (subrange) with a suggested alternative.
 * Works without the legacy Spell Checker. The replacement is applied directly to the file text.
 */
 class ReplaceWordFix(
    private val range: TextRange,
    private val original: String,
    private val replacementRaw: String
 ) : IntentionAction {
    override fun getText(): String = "Replace '$original' with '$replacementRaw'"
    override fun getFamilyName(): String = "Lyng Spelling"
    override fun isAvailable(project: Project, editor: Editor?, file: PsiFile?): Boolean =
        editor != null && file != null && range.startOffset in 0..range.endOffset
    override fun startInWriteAction(): Boolean = true
    override fun invoke(project: Project, editor: Editor?, file: PsiFile?) {
        if (editor == null) return
        val doc: Document = editor.document
        val safeRange = range.constrainTo(doc)
        val current = doc.getText(safeRange)
        // Preserve basic case style based on the original token
        val replacement = adaptCaseStyle(current, replacementRaw)
        WriteCommandAction.runWriteCommandAction(project, "Replace word", null, Runnable {
            doc.replaceString(safeRange.startOffset, safeRange.endOffset, replacement)
        }, file)
        // Move caret to end of replacement for convenience
        try {
            val caret: CaretModel = editor.caretModel
            caret.moveToOffset(safeRange.startOffset + replacement.length)
        } catch (_: Throwable) {}
        // Restart daemon to refresh highlights
        if (file != null) DaemonCodeAnalyzer.getInstance(project).restart(file)
    }
    private fun TextRange.constrainTo(doc: Document): TextRange {
        val start = startOffset.coerceIn(0, doc.textLength)
        val end = endOffset.coerceIn(start, doc.textLength)
        return TextRange(start, end)
    }
    private fun adaptCaseStyle(sample: String, suggestion: String): String {
        if (suggestion.isEmpty()) return suggestion
        return when {
            sample.all { it.isUpperCase() } -> suggestion.uppercase()
            // PascalCase / Capitalized single word
            sample.firstOrNull()?.isUpperCase() == true && sample.drop(1).any { it.isLowerCase() } ->
                suggestion.replaceFirstChar { if (it.isLowerCase()) it.titlecase() else it.toString() }
            // snake_case -> lower
            sample.contains('_') -> suggestion.lowercase()
            // camelCase -> lower first
            sample.firstOrNull()?.isLowerCase() == true && sample.any { it.isUpperCase() } ->
                suggestion.replaceFirstChar { it.lowercase() }
            else -> suggestion
        }
    }
 }
@@ -0,0 +1,77 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.grazie
 import com.intellij.openapi.diagnostic.Logger
 import java.io.BufferedReader
 import java.io.InputStreamReader
 import java.util.zip.GZIPInputStream
 /**
 * Lightweight technical/Lyng vocabulary dictionary.
 * Loaded from classpath resources; supports .txt and .txt.gz. Merged with EnglishDictionary.
 */
 object TechDictionary {
    private val log = Logger.getInstance(TechDictionary::class.java)
    @Volatile private var loaded = false
    @Volatile private var words: Set<String> = emptySet()
    private fun ensureLoaded() {
        if (loaded) return
        synchronized(this) {
            if (loaded) return
            val candidates = listOf(
                "/dictionaries/tech-lyng.txt.gz",
                "/dictionaries/tech-lyng.txt"
            )
            val merged = HashSet<String>(8_000)
            for (res in candidates) {
                try {
                    val stream = javaClass.getResourceAsStream(res) ?: continue
                    val reader = if (res.endsWith(".gz"))
                        BufferedReader(InputStreamReader(GZIPInputStream(stream)))
                    else
                        BufferedReader(InputStreamReader(stream))
                    var n = 0
                    reader.useLines { seq -> seq.forEach { line ->
                        val w = line.trim()
                        if (w.isNotEmpty() && !w.startsWith("#")) { merged += w.lowercase(); n++ }
                    } }
                    log.info("TechDictionary: loaded $n words from $res (total=${merged.size})")
                } catch (t: Throwable) {
                    log.info("TechDictionary: failed to load $res: ${t.javaClass.simpleName}: ${t.message}")
                }
            }
            if (merged.isEmpty()) {
                merged += setOf(
                    // minimal Lyng/tech seeding to avoid empty dictionary
                    "lyng","miniast","binder","printf","specifier","specifiers","regex","token","tokens",
                    "identifier","identifiers","keyword","keywords","comment","comments","string","strings",
                    "literal","literals","formatting","formatter","grazie","typo","typos","dictionary","dictionaries"
                )
                log.info("TechDictionary: using minimal built-in set (${merged.size})")
            }
            words = merged
            loaded = true
        }
    }
    fun allWords(): Set<String> {
        ensureLoaded()
        return words
    }
 }
@@ -0,0 +1,72 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.highlight
 import com.intellij.openapi.editor.colors.TextAttributesKey
 import com.intellij.openapi.fileTypes.SyntaxHighlighter
 import com.intellij.openapi.options.colors.AttributesDescriptor
 import com.intellij.openapi.options.colors.ColorDescriptor
 import com.intellij.openapi.options.colors.ColorSettingsPage
 import javax.swing.Icon
 class LyngColorSettingsPage : ColorSettingsPage {
    override fun getDisplayName(): String = "Lyng"
    override fun getIcon(): Icon? = null
    override fun getHighlighter(): SyntaxHighlighter = LyngSyntaxHighlighter()
    override fun getDemoText(): String = """
        // Lyng demo
        import lyng.stdlib as std
        class Sample {
          fun greet(name: String): String {
            val message = "Hello, " + name
            return message
          }
        }
        var counter = 0
        counter = counter + 1
    """.trimIndent()
    override fun getAdditionalHighlightingTagToDescriptorMap(): MutableMap<String, TextAttributesKey>? = null
    override fun getAttributeDescriptors(): Array<AttributesDescriptor> = arrayOf(
        AttributesDescriptor("Keyword", LyngHighlighterColors.KEYWORD),
        AttributesDescriptor("String", LyngHighlighterColors.STRING),
        AttributesDescriptor("Number", LyngHighlighterColors.NUMBER),
        AttributesDescriptor("Line comment", LyngHighlighterColors.LINE_COMMENT),
        AttributesDescriptor("Block comment", LyngHighlighterColors.BLOCK_COMMENT),
        AttributesDescriptor("Identifier", LyngHighlighterColors.IDENTIFIER),
        AttributesDescriptor("Punctuation", LyngHighlighterColors.PUNCT),
        // Semantic
        AttributesDescriptor("Annotation (semantic)", LyngHighlighterColors.ANNOTATION),
        AttributesDescriptor("Variable (semantic)", LyngHighlighterColors.VARIABLE),
        AttributesDescriptor("Value (semantic)", LyngHighlighterColors.VALUE),
        AttributesDescriptor("Function (semantic)", LyngHighlighterColors.FUNCTION),
        AttributesDescriptor("Function declaration (semantic)", LyngHighlighterColors.FUNCTION_DECLARATION),
        AttributesDescriptor("Type (semantic)", LyngHighlighterColors.TYPE),
        AttributesDescriptor("Namespace (semantic)", LyngHighlighterColors.NAMESPACE),
        AttributesDescriptor("Parameter (semantic)", LyngHighlighterColors.PARAMETER),
        AttributesDescriptor("Enum constant (semantic)", LyngHighlighterColors.ENUM_CONSTANT),
    )
    override fun getColorDescriptors(): Array<ColorDescriptor> = ColorDescriptor.EMPTY_ARRAY
 }
@@ -0,0 +1,85 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 /*
 * Text attribute keys for Lyng token and semantic highlighting
 */
 package net.sergeych.lyng.idea.highlight
 import com.intellij.openapi.editor.DefaultLanguageHighlighterColors
 import com.intellij.openapi.editor.colors.TextAttributesKey
 object LyngHighlighterColors {
    val KEYWORD: TextAttributesKey = TextAttributesKey.createTextAttributesKey(
        "LYNG_KEYWORD", DefaultLanguageHighlighterColors.KEYWORD
    )
    val STRING: TextAttributesKey = TextAttributesKey.createTextAttributesKey(
        "LYNG_STRING", DefaultLanguageHighlighterColors.STRING
    )
    val NUMBER: TextAttributesKey = TextAttributesKey.createTextAttributesKey(
        "LYNG_NUMBER", DefaultLanguageHighlighterColors.NUMBER
    )
    val LINE_COMMENT: TextAttributesKey = TextAttributesKey.createTextAttributesKey(
        "LYNG_LINE_COMMENT", DefaultLanguageHighlighterColors.LINE_COMMENT
    )
    val BLOCK_COMMENT: TextAttributesKey = TextAttributesKey.createTextAttributesKey(
        "LYNG_BLOCK_COMMENT", DefaultLanguageHighlighterColors.BLOCK_COMMENT
    )
    val IDENTIFIER: TextAttributesKey = TextAttributesKey.createTextAttributesKey(
        "LYNG_IDENTIFIER", DefaultLanguageHighlighterColors.IDENTIFIER
    )
    val PUNCT: TextAttributesKey = TextAttributesKey.createTextAttributesKey(
        "LYNG_PUNCT", DefaultLanguageHighlighterColors.DOT
    )
    // Semantic layer keys
    val VARIABLE: TextAttributesKey = TextAttributesKey.createTextAttributesKey(
        // Use a distinctive default to ensure visibility across common themes.
        // Users can still customize it separately from VALUE.
        "LYNG_VARIABLE", DefaultLanguageHighlighterColors.INSTANCE_FIELD
    )
    val VALUE: TextAttributesKey = TextAttributesKey.createTextAttributesKey(
        "LYNG_VALUE", DefaultLanguageHighlighterColors.INSTANCE_FIELD
    )
    val FUNCTION: TextAttributesKey = TextAttributesKey.createTextAttributesKey(
        // Primary approach: make function calls as visible as declarations by default
        // (users can still customize separately in the color scheme UI).
        "LYNG_FUNCTION", DefaultLanguageHighlighterColors.FUNCTION_DECLARATION
    )
    val FUNCTION_DECLARATION: TextAttributesKey = TextAttributesKey.createTextAttributesKey(
        "LYNG_FUNCTION_DECLARATION", DefaultLanguageHighlighterColors.FUNCTION_DECLARATION
    )
    val TYPE: TextAttributesKey = TextAttributesKey.createTextAttributesKey(
        "LYNG_TYPE", DefaultLanguageHighlighterColors.CLASS_REFERENCE
    )
    val NAMESPACE: TextAttributesKey = TextAttributesKey.createTextAttributesKey(
        "LYNG_NAMESPACE", DefaultLanguageHighlighterColors.PREDEFINED_SYMBOL
    )
    val PARAMETER: TextAttributesKey = TextAttributesKey.createTextAttributesKey(
        "LYNG_PARAMETER", DefaultLanguageHighlighterColors.PARAMETER
    )
    // Annotations (@Something) — use Kotlin/Java metadata default color
    val ANNOTATION: TextAttributesKey = TextAttributesKey.createTextAttributesKey(
        "LYNG_ANNOTATION", DefaultLanguageHighlighterColors.METADATA
    )
    // Enum constant (declaration or usage)
    val ENUM_CONSTANT: TextAttributesKey = TextAttributesKey.createTextAttributesKey(
        "LYNG_ENUM_CONSTANT", DefaultLanguageHighlighterColors.STATIC_FIELD
    )
 }
@@ -0,0 +1,163 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 /*
 * Minimal hand-written lexer for Lyng token highlighting
 */
 package net.sergeych.lyng.idea.highlight
 import com.intellij.lexer.LexerBase
 import com.intellij.psi.tree.IElementType
 class LyngLexer : LexerBase() {
    private var buffer: CharSequence = ""
    private var startOffset: Int = 0
    private var endOffset: Int = 0
    private var myTokenStart: Int = 0
    private var myTokenEnd: Int = 0
    private var myTokenType: IElementType? = null
    private val keywords = setOf(
        "fun", "val", "var", "class", "type", "import", "as",
        "if", "else", "for", "while", "return", "true", "false", "null",
        "when", "in", "is", "break", "continue", "try", "catch", "finally",
        "get", "set"
    )
    override fun start(buffer: CharSequence, startOffset: Int, endOffset: Int, initialState: Int) {
        this.buffer = buffer
        this.startOffset = startOffset
        this.endOffset = endOffset
        this.myTokenStart = startOffset
        this.myTokenEnd = startOffset
        this.myTokenType = null
        advance()
    }
    override fun getState(): Int = 0
    override fun getTokenType(): IElementType? = myTokenType
    override fun getTokenStart(): Int = myTokenStart
    override fun getTokenEnd(): Int = myTokenEnd
    override fun getBufferSequence(): CharSequence = buffer
    override fun getBufferEnd(): Int = endOffset
    override fun advance() {
        if (myTokenEnd >= endOffset) {
            myTokenType = null
            return
        }
        var i = if (myTokenEnd == 0) startOffset else myTokenEnd
        // Skip nothing; set start
        myTokenStart = i
        if (i >= endOffset) { myTokenType = null; return }
        val ch = buffer[i]
        // Whitespace
        if (ch.isWhitespace()) {
            i++
            while (i < endOffset && buffer[i].isWhitespace()) i++
            myTokenEnd = i
            myTokenType = LyngTokenTypes.WHITESPACE
            return
        }
        // Line comment //...
        if (ch == '/' && i + 1 < endOffset && buffer[i + 1] == '/') {
            i += 2
            while (i < endOffset && buffer[i] != '\n' && buffer[i] != '\r') i++
            myTokenEnd = i
            myTokenType = LyngTokenTypes.LINE_COMMENT
            return
        }
        // Block comment /* ... */
        if (ch == '/' && i + 1 < endOffset && buffer[i + 1] == '*') {
            i += 2
            while (i + 1 < endOffset && !(buffer[i] == '*' && buffer[i + 1] == '/')) i++
            if (i + 1 < endOffset) i += 2 // consume */
            myTokenEnd = i
            myTokenType = LyngTokenTypes.BLOCK_COMMENT
            return
        }
        // String "..." with simple escape handling
        if (ch == '"') {
            i++
            while (i < endOffset) {
                val c = buffer[i]
                if (c == '\\') { // escape
                    i += 2
                    continue
                }
                if (c == '"') { i++; break }
                i++
            }
            myTokenEnd = i
            myTokenType = LyngTokenTypes.STRING
            return
        }
        // Number
        if (ch.isDigit()) {
            i++
            var hasDot = false
            while (i < endOffset) {
                val c = buffer[i]
                if (c.isDigit()) { i++; continue }
                if (c == '.' && !hasDot) { hasDot = true; i++; continue }
                break
            }
            myTokenEnd = i
            myTokenType = LyngTokenTypes.NUMBER
            return
        }
        // Identifier / keyword
        if (ch.isIdentifierStart()) {
            i++
            while (i < endOffset && buffer[i].isIdentifierPart()) i++
            myTokenEnd = i
            val text = buffer.subSequence(myTokenStart, myTokenEnd).toString()
            myTokenType = if (text in keywords) LyngTokenTypes.KEYWORD else LyngTokenTypes.IDENTIFIER
            return
        }
        // Punctuation
        if (isPunct(ch)) {
            i++
            myTokenEnd = i
            myTokenType = LyngTokenTypes.PUNCT
            return
        }
        // Fallback bad char
        myTokenEnd = i + 1
        myTokenType = LyngTokenTypes.BAD_CHAR
    }
    private fun Char.isWhitespace(): Boolean = this == ' ' || this == '\t' || this == '\n' || this == '\r' || this == '\u000C'
    private fun Char.isDigit(): Boolean = this in '0'..'9'
    private fun Char.isIdentifierStart(): Boolean = this == '_' || this.isLetter()
    private fun Char.isIdentifierPart(): Boolean = this.isIdentifierStart() || this.isDigit()
    private fun isPunct(c: Char): Boolean = c in setOf('(', ')', '{', '}', '[', ']', '.', ',', ';', ':', '+', '-', '*', '/', '%', '=', '<', '>', '!', '?', '&', '|', '^', '~')
 }
@@ -0,0 +1,40 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.highlight
 import com.intellij.lexer.Lexer
 import com.intellij.openapi.editor.colors.TextAttributesKey
 import com.intellij.openapi.fileTypes.SyntaxHighlighter
 import com.intellij.psi.tree.IElementType
 class LyngSyntaxHighlighter : SyntaxHighlighter {
    override fun getHighlightingLexer(): Lexer = LyngLexer()
    override fun getTokenHighlights(tokenType: IElementType): Array<TextAttributesKey> = when (tokenType) {
        LyngTokenTypes.KEYWORD -> pack(LyngHighlighterColors.KEYWORD)
        LyngTokenTypes.STRING -> pack(LyngHighlighterColors.STRING)
        LyngTokenTypes.NUMBER -> pack(LyngHighlighterColors.NUMBER)
        LyngTokenTypes.LINE_COMMENT -> pack(LyngHighlighterColors.LINE_COMMENT)
        LyngTokenTypes.BLOCK_COMMENT -> pack(LyngHighlighterColors.BLOCK_COMMENT)
        LyngTokenTypes.PUNCT -> pack(LyngHighlighterColors.PUNCT)
        LyngTokenTypes.IDENTIFIER -> pack(LyngHighlighterColors.IDENTIFIER)
        else -> emptyArray()
    }
    private fun pack(vararg keys: TextAttributesKey): Array<TextAttributesKey> = arrayOf(*keys)
 }
@@ -0,0 +1,25 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.highlight
 import com.intellij.openapi.fileTypes.SingleLazyInstanceSyntaxHighlighterFactory
 import com.intellij.openapi.fileTypes.SyntaxHighlighter
 class LyngSyntaxHighlighterFactory : SingleLazyInstanceSyntaxHighlighterFactory() {
    override fun createHighlighter(): SyntaxHighlighter = LyngSyntaxHighlighter()
 }
@@ -0,0 +1,34 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.highlight
 import com.intellij.psi.tree.IElementType
 import net.sergeych.lyng.idea.LyngLanguage
 class LyngTokenType(debugName: String) : IElementType(debugName, LyngLanguage)
 object LyngTokenTypes {
    val WHITESPACE = LyngTokenType("WHITESPACE")
    val LINE_COMMENT = LyngTokenType("LINE_COMMENT")
    val BLOCK_COMMENT = LyngTokenType("BLOCK_COMMENT")
    val STRING = LyngTokenType("STRING")
    val NUMBER = LyngTokenType("NUMBER")
    val KEYWORD = LyngTokenType("KEYWORD")
    val IDENTIFIER = LyngTokenType("IDENTIFIER")
    val PUNCT = LyngTokenType("PUNCT")
    val BAD_CHAR = LyngTokenType("BAD_CHAR")
 }
@@ -0,0 +1,109 @@
 /*
 * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.navigation
 import com.intellij.icons.AllIcons
 import com.intellij.navigation.ItemPresentation
 import com.intellij.openapi.util.TextRange
 import com.intellij.psi.PsiDocumentManager
 import com.intellij.psi.PsiElement
 import com.intellij.psi.PsiFile
 import com.intellij.psi.PsiNameIdentifierOwner
 import com.intellij.psi.impl.light.LightElement
 import com.intellij.util.IncorrectOperationException
 import net.sergeych.lyng.idea.LyngLanguage
 import javax.swing.Icon
 /**
 * A light PSI element representing a Lyng declaration (function, class, enum, or variable).
 * Used for navigation and to provide a stable anchor for "Find Usages".
 */
 class LyngDeclarationElement(
    private val nameElement: PsiElement,
    private val name: String,
    val kind: String = "declaration"
 ) : LightElement(nameElement.manager, LyngLanguage), PsiNameIdentifierOwner {
    override fun getName(): String = name
    override fun setName(name: String): PsiElement {
        throw IncorrectOperationException("Renaming is not yet supported")
    }
    override fun getNameIdentifier(): PsiElement = nameElement
    override fun getNavigationElement(): PsiElement = nameElement
    override fun getTextRange(): TextRange = nameElement.textRange
    override fun getContainingFile(): PsiFile = nameElement.containingFile
    override fun isValid(): Boolean = nameElement.isValid
    override fun getPresentation(): ItemPresentation {
        return object : ItemPresentation {
            override fun getPresentableText(): String = name
            override fun getLocationString(): String {
                val file = containingFile
                val document = PsiDocumentManager.getInstance(file.project).getDocument(file)
                val line = if (document != null) document.getLineNumber(textRange.startOffset) + 1 else "?"
                val column = if (document != null) {
                    val lineStart = document.getLineStartOffset(document.getLineNumber(textRange.startOffset))
                    textRange.startOffset - lineStart + 1
                } else "?"
                return "${file.name}:$line:$column"
            }
            override fun getIcon(unused: Boolean): Icon {
                return when (kind) {
                    "Function" -> AllIcons.Nodes.Function
                    "Class" -> AllIcons.Nodes.Class
                    "Enum" -> AllIcons.Nodes.Enum
                    "EnumConstant" -> AllIcons.Nodes.Enum
                    "Variable" -> AllIcons.Nodes.Variable
                    "Value" -> AllIcons.Nodes.Field
                    "Parameter" -> AllIcons.Nodes.Parameter
                    "Initializer" -> AllIcons.Nodes.Method
                    else -> AllIcons.Nodes.Property
                }
            }
        }
    }
    override fun toString(): String = "$kind:$name"
    override fun equals(other: Any?): Boolean {
        if (this === other) return true
        if (other !is LyngDeclarationElement) return false
        return name == other.name && nameElement == other.nameElement
    }
    override fun isEquivalentTo(another: PsiElement?): Boolean {
        if (this === another) return true
        if (another == nameElement) return true
        if (another is LyngDeclarationElement) {
            return name == another.name && nameElement == another.nameElement
        }
        return super.isEquivalentTo(another)
    }
    override fun hashCode(): Int {
        var result = nameElement.hashCode()
        result = 31 * result + name.hashCode()
        return result
    }
 }
@@ -0,0 +1,92 @@
 /*
 * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.navigation
 import com.intellij.lang.cacheBuilder.DefaultWordsScanner
 import com.intellij.lang.cacheBuilder.WordsScanner
 import com.intellij.lang.findUsages.FindUsagesProvider
 import com.intellij.psi.PsiDocumentManager
 import com.intellij.psi.PsiElement
 import com.intellij.psi.tree.TokenSet
 import net.sergeych.lyng.idea.highlight.LyngLexer
 import net.sergeych.lyng.idea.highlight.LyngTokenTypes
 import net.sergeych.lyng.idea.util.LyngAstManager
 import net.sergeych.lyng.miniast.DocLookupUtils
 class LyngFindUsagesProvider : FindUsagesProvider {
    override fun getWordsScanner(): WordsScanner {
        return DefaultWordsScanner(
            LyngLexer(),
            TokenSet.create(LyngTokenTypes.IDENTIFIER),
            TokenSet.create(LyngTokenTypes.LINE_COMMENT, LyngTokenTypes.BLOCK_COMMENT),
            TokenSet.create(LyngTokenTypes.STRING)
        )
    }
    override fun canFindUsagesFor(psiElement: PsiElement): Boolean {
        return psiElement is LyngDeclarationElement || isDeclaration(psiElement)
    }
    private fun isDeclaration(element: PsiElement): Boolean {
        val file = element.containingFile ?: return false
        val mini = LyngAstManager.getMiniAst(file) ?: return false
        val offset = element.textRange.startOffset
        val name = element.text ?: ""
        return DocLookupUtils.findDeclarationAt(mini, offset, name) != null
    }
    override fun getHelpId(psiElement: PsiElement): String? = null
    override fun getType(element: PsiElement): String {
        if (element is LyngDeclarationElement) return element.kind
        val file = element.containingFile ?: return "Lyng declaration"
        val mini = LyngAstManager.getMiniAst(file) ?: return "Lyng declaration"
        val info = DocLookupUtils.findDeclarationAt(mini, element.textRange.startOffset, element.text ?: "")
        return info?.second ?: "Lyng declaration"
    }
    override fun getDescriptiveName(element: PsiElement): String {
        if (element is LyngDeclarationElement) {
            val file = element.containingFile
            val document = PsiDocumentManager.getInstance(file.project).getDocument(file)
            val line = if (document != null) document.getLineNumber(element.textRange.startOffset) + 1 else "?"
            val column = if (document != null) {
                val lineStart = document.getLineStartOffset(document.getLineNumber(element.textRange.startOffset))
                element.textRange.startOffset - lineStart + 1
            } else "?"
            return "${element.name} (${file.name}:$line:$column)"
        }
        val file = element.containingFile ?: return element.text ?: "unknown"
        val mini = LyngAstManager.getMiniAst(file) ?: return element.text ?: "unknown"
        val info = DocLookupUtils.findDeclarationAt(mini, element.textRange.startOffset, element.text ?: "")
        val document = PsiDocumentManager.getInstance(file.project).getDocument(file)
        val line = if (document != null) document.getLineNumber(element.textRange.startOffset) + 1 else "?"
        val column = if (document != null) {
            val lineStart = document.getLineStartOffset(document.getLineNumber(element.textRange.startOffset))
            element.textRange.startOffset - lineStart + 1
        } else "?"
        val name = info?.first ?: element.text ?: "unknown"
        return "$name (${file.name}:$line:$column)"
    }
    override fun getNodeText(element: PsiElement, useFullName: Boolean): String {
        return (element as? LyngDeclarationElement)?.name ?: element.text ?: "unknown"
    }
 }
@@ -0,0 +1,58 @@
 /*
 * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.navigation
 import com.intellij.codeInsight.navigation.actions.GotoDeclarationHandler
 import com.intellij.openapi.editor.Editor
 import com.intellij.psi.PsiElement
 /**
 * Ensures Ctrl+B (Go to Definition) works on Lyng identifiers by resolving through LyngPsiReference.
 */
 class LyngGotoDeclarationHandler : GotoDeclarationHandler {
    override fun getGotoDeclarationTargets(sourceElement: PsiElement?, offset: Int, editor: Editor?): Array<PsiElement>? {
        if (sourceElement == null) return null
        val allTargets = mutableListOf<PsiElement>()
        // Find reference at the element or its parent (sometimes the identifier token is wrapped)
        val ref = sourceElement.reference ?: sourceElement.parent?.reference
        if (ref is LyngPsiReference) {
            val resolved = ref.multiResolve(false)
            allTargets.addAll(resolved.mapNotNull { it.element })
        } else {
            // Manual check if not picked up by reference (e.g. if contributor didn't run yet)
            val manualRef = LyngPsiReference(sourceElement)
            val manualResolved = manualRef.multiResolve(false)
            allTargets.addAll(manualResolved.mapNotNull { it.element })
        }
        if (allTargets.isEmpty()) return null
        // If there is only one target and it's equivalent to the source, return null.
        // This allows IDEA to treat it as a declaration site and trigger "Show Usages".
        if (allTargets.size == 1) {
            val target = allTargets[0]
            if (target == sourceElement || target.isEquivalentTo(sourceElement)) {
                return null
            }
        }
        return allTargets.toTypedArray()
    }
 }
@@ -0,0 +1,48 @@
 /*
 * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.navigation
 import com.intellij.icons.AllIcons
 import com.intellij.ide.IconProvider
 import com.intellij.psi.PsiElement
 import net.sergeych.lyng.idea.util.LyngAstManager
 import net.sergeych.lyng.miniast.DocLookupUtils
 import javax.swing.Icon
 class LyngIconProvider : IconProvider() {
    override fun getIcon(element: PsiElement, flags: Int): Icon? {
        val file = element.containingFile ?: return null
        val mini = LyngAstManager.getMiniAst(file) ?: return null
        val info = DocLookupUtils.findDeclarationAt(mini, element.textRange.startOffset, element.text ?: "")
        if (info != null) {
            return when (info.second) {
                "Function" -> AllIcons.Nodes.Function
                "Class" -> AllIcons.Nodes.Class
                "Enum" -> AllIcons.Nodes.Enum
                "EnumConstant" -> AllIcons.Nodes.Enum
                "Variable" -> AllIcons.Nodes.Variable
                "Value" -> AllIcons.Nodes.Field
                "Parameter" -> AllIcons.Nodes.Parameter
                "Initializer" -> AllIcons.Nodes.Method
                else -> null
            }
        }
        return null
    }
 }
@@ -0,0 +1,204 @@
 /*
 * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.navigation
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.util.TextRange
 import com.intellij.psi.*
 import com.intellij.psi.search.FilenameIndex
 import com.intellij.psi.search.GlobalSearchScope
 import net.sergeych.lyng.highlight.offsetOf
 import net.sergeych.lyng.idea.util.LyngAstManager
 import net.sergeych.lyng.idea.util.TextCtx
 import net.sergeych.lyng.miniast.*
 class LyngPsiReference(element: PsiElement) : PsiPolyVariantReferenceBase<PsiElement>(element, TextRange(0, element.textLength)) {
    override fun multiResolve(incompleteCode: Boolean): Array<ResolveResult> {
        val file = element.containingFile
        val text = file.text
        val offset = element.textRange.startOffset
        val name = element.text ?: ""
        val results = mutableListOf<ResolveResult>()
        val mini = LyngAstManager.getMiniAst(file) ?: return emptyArray()
        val binding = LyngAstManager.getBinding(file)
        // 1. Member resolution (obj.member)
        val dotPos = TextCtx.findDotLeft(text, offset)
        if (dotPos != null) {
            val imported = DocLookupUtils.canonicalImportedModules(mini, text)
            val receiverClass = DocLookupUtils.guessReceiverClassViaMini(mini, text, dotPos, imported, binding)
                ?: DocLookupUtils.guessReceiverClass(text, dotPos, imported, mini)
            if (receiverClass != null) {
                val resolved = DocLookupUtils.resolveMemberWithInheritance(imported, receiverClass, name, mini)
                if (resolved != null) {
                    val owner = resolved.first
                    val member = resolved.second
                    // We need to find the actual PSI element for this member
                    val targetFile = findFileForClass(file.project, owner) ?: file
                    val targetMini = LyngAstManager.getMiniAst(targetFile)
                    if (targetMini != null) {
                        val targetSrc = targetMini.range.start.source
                        val off = targetSrc.offsetOf(member.nameStart)
                        targetFile.findElementAt(off)?.let {
                            val kind = when(member) {
                                is MiniMemberFunDecl -> "Function"
                                is MiniMemberValDecl -> if (member.mutable) "Variable" else "Value"
                                is MiniInitDecl -> "Initializer"
                            }
                            results.add(PsiElementResolveResult(LyngDeclarationElement(it, member.name, kind)))
                        }
                    }
                }
            }
            // If we couldn't resolve exactly, we might still want to search globally but ONLY for members
            if (results.isEmpty()) {
                results.addAll(resolveGlobally(file.project, name, membersOnly = true))
            }
        } else {
            // 2. Local resolution via Binder
            if (binding != null) {
                val ref = binding.references.firstOrNull { offset >= it.start && offset < it.end }
                if (ref != null) {
                    val sym = binding.symbols.firstOrNull { it.id == ref.symbolId }
                    if (sym != null && sym.declStart >= 0) {
                        file.findElementAt(sym.declStart)?.let {
                            results.add(PsiElementResolveResult(LyngDeclarationElement(it, sym.name, sym.kind.name)))
                        }
                    }
                }
            }
            // 3. Global project scan
            // Only search globally if we haven't found a strong local match
            if (results.isEmpty()) {
                results.addAll(resolveGlobally(file.project, name))
            }
        }
        // 4. Filter results to exclude duplicates
        // Use a more robust de-duplication that prefers the raw element if multiple refer to the same thing
        val filtered = mutableListOf<ResolveResult>()
        for (res in results) {
            val el = res.element ?: continue
            val nav = if (el is LyngDeclarationElement) el.navigationElement else el
            if (filtered.none { existing -> 
                val exEl = existing.element
                val exNav = if (exEl is LyngDeclarationElement) exEl.navigationElement else exEl
                exNav == nav || (exNav != null && exNav.isEquivalentTo(nav))
            }) {
                filtered.add(res)
            }
        }
        return filtered.toTypedArray()
    }
    private fun findFileForClass(project: Project, className: String): PsiFile? {
        val psiManager = PsiManager.getInstance(project)
        // 1. Try file with matching name first (optimization)
        val matchingFiles = FilenameIndex.getFilesByName(project, "$className.lyng", GlobalSearchScope.projectScope(project))
        for (file in matchingFiles) {
            val mini = LyngAstManager.getMiniAst(file) ?: continue
            if (mini.declarations.any { (it is MiniClassDecl && it.name == className) || (it is MiniEnumDecl && it.name == className) }) {
                return file
            }
        }
        // 2. Fallback to full project scan
        val allFiles = FilenameIndex.getAllFilesByExt(project, "lyng", GlobalSearchScope.projectScope(project))
        for (vFile in allFiles) {
            val file = psiManager.findFile(vFile) ?: continue
            if (matchingFiles.contains(file)) continue // already checked
            val mini = LyngAstManager.getMiniAst(file) ?: continue
            if (mini.declarations.any { (it is MiniClassDecl && it.name == className) || (it is MiniEnumDecl && it.name == className) }) {
                return file
            }
        }
        return null
    }
    override fun resolve(): PsiElement? {
        val results = multiResolve(false)
        if (results.isEmpty()) return null
        val target = results[0].element ?: return null
        // If the target is equivalent to our source element, return the source element itself.
        // This is crucial for IDEA to recognize we are already at the declaration site
        // and trigger "Show Usages" instead of performing a no-op navigation.
        if (target == element || target.isEquivalentTo(element)) {
            return element
        }
        return target
    }
    private fun resolveGlobally(project: Project, name: String, membersOnly: Boolean = false): List<ResolveResult> {
        val results = mutableListOf<ResolveResult>()
        val files = FilenameIndex.getAllFilesByExt(project, "lyng", GlobalSearchScope.projectScope(project))
        val psiManager = PsiManager.getInstance(project)
        for (vFile in files) {
            val file = psiManager.findFile(vFile) ?: continue
            val mini = LyngAstManager.getMiniAst(file) ?: continue
            val src = mini.range.start.source
            fun addIfMatch(dName: String, nameStart: net.sergeych.lyng.Pos, dKind: String) {
                if (dName == name) {
                    val off = src.offsetOf(nameStart)
                    file.findElementAt(off)?.let {
                        results.add(PsiElementResolveResult(LyngDeclarationElement(it, dName, dKind)))
                    }
                }
            }
            for (d in mini.declarations) {
                if (!membersOnly) {
                    val dKind = when(d) {
                        is net.sergeych.lyng.miniast.MiniFunDecl -> "Function"
                        is net.sergeych.lyng.miniast.MiniClassDecl -> "Class"
                        is net.sergeych.lyng.miniast.MiniEnumDecl -> "Enum"
                        is net.sergeych.lyng.miniast.MiniValDecl -> if (d.mutable) "Variable" else "Value"
                    }
                    addIfMatch(d.name, d.nameStart, dKind)
                }
                // Check members of classes and enums
                val members = when(d) {
                    is MiniClassDecl -> d.members
                    is MiniEnumDecl -> DocLookupUtils.enumToSyntheticClass(d).members
                    else -> emptyList()
                }
                for (m in members) {
                    val mKind = when(m) {
                        is net.sergeych.lyng.miniast.MiniMemberFunDecl -> "Function"
                        is net.sergeych.lyng.miniast.MiniMemberValDecl -> if (m.mutable) "Variable" else "Value"
                        is net.sergeych.lyng.miniast.MiniInitDecl -> "Initializer"
                    }
                    addIfMatch(m.name, m.nameStart, mKind)
                }
            }
        }
        return results
    }
    override fun getVariants(): Array<Any> = emptyArray()
 }
@@ -0,0 +1,54 @@
 /*
 * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.navigation
 import com.intellij.patterns.PlatformPatterns
 import com.intellij.psi.*
 import com.intellij.util.ProcessingContext
 import net.sergeych.lyng.idea.LyngLanguage
 import net.sergeych.lyng.idea.highlight.LyngTokenTypes
 import net.sergeych.lyng.idea.util.LyngAstManager
 import net.sergeych.lyng.miniast.DocLookupUtils
 class LyngPsiReferenceContributor : PsiReferenceContributor() {
    override fun registerReferenceProviders(registrar: PsiReferenceRegistrar) {
        registrar.registerReferenceProvider(
            PlatformPatterns.psiElement().withLanguage(LyngLanguage),
            object : PsiReferenceProvider() {
                override fun getReferencesByElement(
                    element: PsiElement,
                    context: ProcessingContext
                ): Array<PsiReference> {
                    if (element.node.elementType == LyngTokenTypes.IDENTIFIER) {
                        val file = element.containingFile
                        val mini = LyngAstManager.getMiniAst(file)
                        if (mini != null) {
                            val offset = element.textRange.startOffset
                            val name = element.text ?: ""
                            if (DocLookupUtils.findDeclarationAt(mini, offset, name) != null) {
                                return PsiReference.EMPTY_ARRAY
                            }
                        }
                        return arrayOf(LyngPsiReference(element))
                    }
                    return PsiReference.EMPTY_ARRAY
                }
            }
        )
    }
 }
@@ -0,0 +1,28 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.psi
 import com.intellij.extapi.psi.PsiFileBase
 import com.intellij.openapi.fileTypes.FileType
 import com.intellij.psi.FileViewProvider
 import net.sergeych.lyng.idea.LyngFileType
 import net.sergeych.lyng.idea.LyngLanguage
 class LyngFile(viewProvider: FileViewProvider) : PsiFileBase(viewProvider, LyngLanguage) {
    override fun getFileType(): FileType = LyngFileType
    override fun toString(): String = "Lyng File"
 }
@@ -0,0 +1,67 @@
 /*
 * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 package net.sergeych.lyng.idea.psi
 import com.intellij.extapi.psi.ASTWrapperPsiElement
 import com.intellij.lang.ASTNode
 import com.intellij.lang.ParserDefinition
 import com.intellij.lang.PsiBuilder
 import com.intellij.lang.PsiParser
 import com.intellij.lexer.Lexer
 import com.intellij.openapi.project.Project
 import com.intellij.psi.FileViewProvider
 import com.intellij.psi.PsiElement
 import com.intellij.psi.PsiFile
 import com.intellij.psi.TokenType
 import com.intellij.psi.tree.IFileElementType
 import com.intellij.psi.tree.TokenSet
 import net.sergeych.lyng.idea.LyngLanguage
 import net.sergeych.lyng.idea.highlight.LyngLexer
 import net.sergeych.lyng.idea.highlight.LyngTokenTypes
 class LyngParserDefinition : ParserDefinition {
    companion object {
        val FILE: IFileElementType = IFileElementType(LyngLanguage)
        private val WHITE_SPACES: TokenSet = TokenSet.create(LyngTokenTypes.WHITESPACE, TokenType.WHITE_SPACE)
        private val COMMENTS: TokenSet = TokenSet.create(LyngTokenTypes.LINE_COMMENT, LyngTokenTypes.BLOCK_COMMENT)
        private val STRINGS: TokenSet = TokenSet.create(LyngTokenTypes.STRING)
    }
    override fun createLexer(project: Project?): Lexer = LyngLexer()
    override fun createParser(project: Project?): PsiParser = PsiParser { root, builder ->
        val mark: PsiBuilder.Marker = builder.mark()
        while (!builder.eof()) builder.advanceLexer()
        mark.done(root)
        builder.treeBuilt
    }
    override fun getFileNodeType(): IFileElementType = FILE
    override fun getWhitespaceTokens(): TokenSet = WHITE_SPACES
    override fun getCommentTokens(): TokenSet = COMMENTS
    override fun getStringLiteralElements(): TokenSet = STRINGS
    override fun createElement(node: ASTNode): PsiElement = ASTWrapperPsiElement(node)
    override fun createFile(viewProvider: FileViewProvider): PsiFile = LyngFile(viewProvider)
    override fun spaceExistenceTypeBetweenTokens(left: ASTNode, right: ASTNode): ParserDefinition.SpaceRequirements =
        ParserDefinition.SpaceRequirements.MAY
 }
Author	SHA1	Message	Date
sergeych	5144a720ba	unsuccussful navigation; we stop at this point	2026-01-03 17:53:54 +01:00
sergeych	bc6613ec01	attempt to add navigation to plugin (partial success)	2026-01-03 11:59:50 +01:00
sergeych	59aefc5bc2	fixed enum objects wrong package	2026-01-02 16:10:05 +01:00
sergeych	fac58675d5	plugin: autocomplete for enums and members, better support for local symbols; fixed bug in space normalization	2026-01-02 16:03:57 +01:00
sergeych	22f6c149db	better formatting for multi-line comments	2026-01-02 11:20:52 +01:00
sergeych	6d8b60fcfa	more docs on embedding fields	2026-01-02 10:41:16 +01:00
sergeych	54ecffc803	improved docs and tools for embedding kotlin classes with properties	2026-01-02 10:34:50 +01:00
sergeych	0731d63adf	Improve error message for `ObjList` concatenation and set version to `1.1.0-SNAPSHOT`.	2025-12-30 02:52:53 +01:00
sergeych	434d74b07f	site badge updated	2025-12-25 22:37:56 +01:00
sergeych	55b27f831f	1.1.0-beta2 version	2025-12-25 22:35:13 +01:00
sergeych	5586e027ea	more stdlib and docs	2025-12-24 18:56:30 +01:00
sergeych	cd2b1a9cb7	Extensions methods and properties now are correctly isolated, respect visibility rules and allow adding class properties and class vals.	2025-12-24 00:29:10 +01:00
sergeych	3b6504d3b1	Add `flatten`, `flatMap`, and `filterNotNull` functions with corresponding tests	2025-12-23 18:06:28 +01:00
sergeych	357585d3ba	removed unneeded test via annotation	2025-12-23 13:36:20 +01:00
sergeych	3a9c567c32	version bump	2025-12-23 13:22:54 +01:00
sergeych	8300c2a3ab	v1.1.0-beta1: mini function declarations and working properties	2025-12-23 13:06:46 +01:00
sergeych	17b4904ae3	fixed test to reflect small Int caching	2025-12-23 10:48:58 +01:00
sergeych	7e8f1406b5	added optimizations for immutable numbers	2025-12-23 09:09:49 +01:00
sergeych	3f235878c0	Add `EfficientIterables.md` documentation for Kotlin interop. Optimize `ObjInt` operations by integrating value caching and updating number operations. Introduce high-performance `enumerate` method for `ObjList`, `ObjSet`, `ObjRange`, and custom iterables. Update compiler and loop handling for improved enumeration logic.	2025-12-23 08:33:34 +01:00
sergeych	5f3a54d08f	Make `ObjInt` and `ObjReal` immutable and update number operations accordingly. Add support for class properties with `get`/`set` accessors. Rework loop parsing logic to improve clarity and consistency. Update `.gitignore` and TextMate grammar. Enhance Changelog and document new features.	2025-12-23 08:02:48 +01:00
sergeych	157b716eb7	Implement automatic substitution for named parameters (auto-named arguments). Supported name: shorthand for name: name in function calls and class constructors. Updated documentation and tests. Built and deployed IDEA plugin and site.	2025-12-22 18:11:38 +01:00
sergeych	c9f96464f3	bump plugin version	2025-12-22 18:43:24 +01:00
sergeych	0732202c80	improved vairable tracking, fixed plugin to wirk with 1.0.10, fixed lambda comparison	2025-12-22 14:55:53 +01:00
sergeych	1e18a162c4	added exception reporting tests	2025-12-22 12:59:11 +01:00
sergeych	0dbfb473bf	fixed scrollspy	2025-12-22 06:30:40 +01:00
sergeych	0add0ab54c	fix #95 destructuring assignment and splats	2025-12-22 06:20:24 +01:00
sergeych	3acd56f55a	fix #94 overridden toString() now is called correctly in known cases, default implementation is still generated for ObjInstances and some other classes	2025-12-22 05:32:19 +01:00
sergeych	b7838b45ec	fixed bug with scopes usage	2025-12-22 05:04:47 +01:00
sergeych	92cb088f36	lazy messages for check/require	2025-12-21 22:49:35 +01:00
sergeych	3dfe98a93d	fixed inline map splats expansion in function calls	2025-12-21 21:12:06 +01:00
sergeych	f6d51e9b94	fixed problems with documentation	2025-12-21 19:57:34 +01:00
sergeych	3ac7fd7ceb	Add `assert`-related testing functions, `findFirst`/`findFirstOrNull` methods, and expand documentation.	2025-12-21 19:11:37 +01:00
sergeych	99f883cfc7	adjust site docs to new feature	2025-12-21 18:26:21 +01:00
sergeych	76a1804dc1	Implement `init` blocks for instance initialization, refactor class initialization logic to ensure correct inheritance and constructor chaining, update documentation and add tests.	2025-12-21 18:14:51 +01:00
sergeych	35cc8fa930	fixed site deploy script to work with cloudflare-backed site	2025-12-20 23:48:16 +01:00
sergeych	6f86e6ff97	fixed bug when some Map operations wer restricted to string keys only	2025-12-20 23:37:56 +01:00
sergeych	fa91afa92b	migrated to Kotlin 2.3.0	2025-12-18 01:33:49 +01:00
sergeych	00503fa105	cosmetics and docs	2025-12-17 22:12:08 +01:00
sergeych	f7a4497f3f	Migrate to `kotlin.time.Instant` and `kotlin.time.Clock`, update dependencies to support Kotlin 2.2, and adopt JVM 17.	2025-12-17 19:53:36 +01:00
sergeych	1aef64e0fa	Add `lowercase` and `uppercase` string functions, update documentation accordingly.	2025-12-17 17:59:51 +01:00
sergeych	5d8fdce637	Move qualified identifier resolution to `Scope` as `resolveQualifiedIdentifier`, replace inline logic in `LynonDecoder`.	2025-12-14 00:20:43 +01:00
sergeych	5a8881bfd5	Refactor `decodeClassObj` to mimic compiler behavior for qualified names, add `evaluateQualifiedNameAsCompiled`.	2025-12-14 00:06:46 +01:00
sergeych	d487886c8f	some more trace on strange decpdeClassObj behavior	2025-12-13 23:41:52 +01:00
sergeych	180471e4cd	Merge remote-tracking branch 'origin/fix_decodeClassObj'	2025-12-13 23:20:55 +01:00
sergeych	71a37a2906	Revert "Improve `decodeClassObj` class resolution in `LynonDecoder`, add fallback lookup mechanisms, and refine related tests" This reverts commit `dd1a1544c6`.	2025-12-13 23:14:12 +01:00
sergeych	ab05f83e77	Revert "Add documentation for Lynon class-name resolution behavior and future plans for fully-qualified name support" This reverts commit `a2d26fc777`.	2025-12-13 23:13:56 +01:00
sergeych	9e11519608	revert to wirking ugly fix for decodeClassObj	2025-12-13 23:11:28 +01:00
sergeych	a2d26fc777	Add documentation for Lynon class-name resolution behavior and future plans for fully-qualified name support	2025-12-13 17:16:10 +01:00
sergeych	dd1a1544c6	Improve `decodeClassObj` class resolution in `LynonDecoder`, add fallback lookup mechanisms, and refine related tests	2025-12-13 17:12:44 +01:00
sergeych	fba44622e5	Refactor `toString` implementations to support `Scope` context, add `inspect`, and improve assertions readability.	2025-12-13 13:48:57 +01:00
sergeych	2737aaa14e	add `mapNotNull` to ObjIterable with documentation	2025-12-12 13:48:02 +01:00
sergeych	bce88ced43	Merge pull request 'fix/scope-parent-cycle' (#92 ) from fix/scope-parent-cycle into master Reviewed-on: #92	2025-12-11 03:09:45 +03:00
sergeych	fd473a32d8	refine some tests	2025-12-11 00:55:05 +01:00
sergeych	d15dfb6087	core: prevent scope parent-chain cycles when reusing pooled frames - Scope.resetForReuse: fully detach before re-parenting (clear state, parent=null, new frameId), then validate with ensureNoCycle and assign parent/args/pos/thisObj - ScopePool.borrow (JVM/Android/JS/Native/Wasm): defensive fallback to fresh Scope allocation if resetForReuse detects a cycle - docs: add docs/fix-scope-parent-cycle.md describing the change and expectations - test: add ScopeCycleRegressionTest to ensure instance method call pattern does not crash and returns "ok"	2025-12-11 00:50:46 +01:00
sergeych	b953282251	docs on updated scopes	2025-12-10 00:04:07 +01:00
sergeych	bcabfc8962	fix endless recursion in scope resolution in some specific cases	2025-12-09 23:55:50 +01:00
sergeych	c0fab3d60e	bump version to 1.0.7-SNAPSHOT; fix potential infinite loops in Scope traversal	2025-12-09 07:33:05 +01:00
sergeych	55caa65f97	fixed dependencies for plugin building	2025-12-08 18:59:16 +01:00
sergeych	b73891d19b	ref $91 trace removed	2025-12-08 18:52:38 +01:00
sergeych	8750040926	fix #91 syntax highlighting of kotlin code blocks on the site	2025-12-08 18:51:55 +01:00
sergeych	708b908415	fix #88 fix #90 plugin with autocompletion	2025-12-08 03:28:27 +01:00
sergeych	c35d684df1	started autocompletion in the plugin	2025-12-07 23:06:05 +01:00
sergeych	678cfbf45e	fix #85 lynon empty list encoding	2025-12-07 21:50:47 +01:00
sergeych	bfffea7e69	fix #83 import-aware quickdocs	2025-12-06 22:25:21 +01:00
sergeych	40f11b6f29	fix #82 refactored and added builtin docs to all symbols	2025-12-06 21:10:40 +01:00
sergeych	e25fc95cbf	fix #81 site search improved	2025-12-06 18:03:15 +01:00
sergeych	a6085b11a1	ignore distributables	2025-12-06 17:37:31 +01:00
sergeych	819fdd82b3	removed distributables from git (derivatives, now there is a copy on the site)	2025-12-06 17:29:11 +01:00
sergeych	2e96d75b9f	fix #80 edge case !isSomething() bug fixed +String.last()	2025-12-06 15:07:38 +01:00
sergeych	f616326383	docs on cli tool, restored cli building tools	2025-12-05 21:46:19 +01:00
sergeych	1e2bbe1fc5	fix #79 enum toJson serialization	2025-12-05 21:39:43 +01:00
sergeych	b630d69186	fix #78 add `fmt` CLI subcommand and improve legacy script execution paths	2025-12-05 21:02:18 +01:00
sergeych	20f4e54a02	red #77 tests and docs for jsom map serialization	2025-12-05 15:42:26 +01:00
sergeych	e58896f087	red #77 more json docs	2025-12-05 11:57:21 +01:00
sergeych	080eac2e1a	fix #77 Instant.toJson	2025-12-05 11:47:42 +01:00
sergeych	a31befef0b	plugin update	2025-12-05 00:33:20 +01:00
sergeych	65a7555e93	fix $76 add support for enum constants highlighting and initial enum documentation	2025-12-05 00:30:32 +01:00
sergeych	84f2f8fac4	fix #75 simple classes JSON serialization with custom formats	2025-12-04 23:58:31 +01:00
sergeych	0c31ec63ee	fix #74 duplicate constructor amd state vars with Lynon serialization	2025-12-04 23:23:31 +01:00
sergeych	603023962e	fix $73 reg #74 val assignment bug fix. Also, cosmetics on syntax highlighting	2025-12-04 22:11:49 +01:00
sergeych	e765784170	plugin updated to v1.0.5	2025-12-04 17:06:41 +01:00
sergeych	171e413c5f	v1.0.5-SNAPSHOT started json and kotlinx serialization support	2025-12-04 17:05:07 +01:00
sergeych	5cfc15cf17	fix #72 comments are allowed in class constructor; some configuration bigs fixed	2025-12-04 16:09:27 +01:00
sergeych	b8f27c7a18	migrated stdlib to separate .lyng files and added build-time generation of Kotlin constants. reduced noise in plugin	2025-12-04 12:26:38 +01:00
sergeych	6a6de83972	updated plugin binary	2025-12-03 17:28:44 +01:00
sergeych	a3b8dbd9d8	improved annotation caching and error range handling for highlighting	2025-12-03 16:27:05 +01:00
sergeych	c63d643469	fixed formatter bugs and some tests; upgraded formatting in plugin	2025-12-03 15:37:35 +01:00
sergeych	f592689631	annotation highlighting (missing)	2025-12-03 13:49:27 +01:00
sergeych	834f3118c8	annotation highlighting	2025-12-03 13:49:09 +01:00
sergeych	d285335e1c	plugin: spell checker f0r 2025	2025-12-03 12:48:06 +01:00
sergeych	2e17297355	Add Grazie-backed grammar checker and dictionary support to Lyng IDEA plugin and variants for replacements with or without Grazie interfaces	2025-12-03 01:29:34 +01:00
sergeych	fbea13570e	idea plugin now shows errors that prevent syntax highlighting and show cached syntax coloring remembered from the last successive pass	2025-12-02 03:29:14 +01:00
sergeych	067970b80c	Add MiniAst documentation system and Markdown rendering for built-in and IDE documentation.	2025-12-02 03:04:14 +01:00
sergeych	c52e132dcc	more readme	2025-12-01 19:14:43 +01:00
sergeych	53f00e6c6c	readme fixes	2025-12-01 18:11:03 +01:00
sergeych	ec49bbbf52	idea plugin 0.0.2-SNAPSHOT, improced, added reformat code. Formatting tools improved in lynglib. Site information added	2025-12-01 17:50:27 +01:00
sergeych	06e8e1579d	idea plugin 0.0.1-SNAPSHOT: basic coloring and editing aids	2025-11-30 23:57:04 +01:00
sergeych	9c342c5c72	Make lyng-mark white and regenerate 256x256 PNG	2025-11-29 10:54:27 +01:00
sergeych	59055ace8c	Add 256x256 PNG export of lyng-mark.svg at site/src/jsMain/resources/icons/lyng-mark-256.png	2025-11-29 10:51:01 +01:00
sergeych	2005f405e4	site icon	2025-11-29 09:58:53 +01:00
sergeych	062f344676	published lyngio to maven, added to docs	2025-11-29 09:02:28 +01:00
sergeych	438e48959e	- fixed bug in compiler (rare) - added lyng.io.fs (multiplatform) - CLI tools now have access to the filesystem	2025-11-29 00:51:01 +01:00
sergeych	41746f22e5	some more samples	2025-11-28 12:38:43 +01:00
sergeych	e584c7aa63	site/docs improvements	2025-11-28 11:25:47 +01:00
sergeych	26ddb94f5d	fixed version number	2025-11-27 21:42:42 +01:00
sergeych	cbca8cacb5	fix #59 implement iterator cancellation on premature termination (break, exception) and ensure no cancellation on natural completion; add tests	2025-11-27 21:40:02 +01:00
sergeych	8fae4709ed	fix #61 set +/- collection gives set with/without items in collection	2025-11-27 20:54:33 +01:00
sergeych	d118d29429	map literals	2025-11-27 20:02:19 +01:00
sergeych	cb9df79ce3	version bump	2025-11-27 15:24:18 +01:00
sergeych	d9a26dd467	better lang page (ribbon & tg channel)	2025-11-27 12:51:32 +01:00
sergeych	813ebebddd	small optimizations	2025-11-27 11:55:17 +01:00
sergeych	2d721101dd	v1.0.1-SNAPSHOT: named args in calls	2025-11-27 11:24:50 +01:00
sergeych	d6e6d68b18	benchmaring tests are now optional	2025-11-27 08:34:49 +01:00
sergeych	83825a9272	fixed call arg precedence bug in last arg callable scenario	2025-11-27 08:15:06 +01:00
sergeych	f0fc7ddd84	lyng textmate bundle idea-compatible	2025-11-24 18:33:41 +01:00
sergeych	ea0ecb1db3	lynglib: added MiniAST support lyngweb: better syntax highlighting and code editor	2025-11-24 00:38:17 +01:00
sergeych	28b961d339	Add comprehensive documentation for `when` statement and integrate related tests and references	2025-11-22 20:11:01 +01:00
sergeych	4d1cd491e0	fixed try ling key processing	2025-11-22 20:01:16 +01:00
sergeych	5fbb1d5393	cosmetics	2025-11-22 15:17:12 +01:00
sergeych	9a4131ee3d	lyngweb: refactor `SiteHighlight` to align package structure and add adjustable textarea height	2025-11-22 14:21:45 +01:00
sergeych	391e200f19	readme updates	2025-11-22 01:41:13 +01:00
sergeych	32e739ab8f	Add comprehensive embedding guide for Lyng in Kotlin projects	2025-11-22 01:39:51 +01:00
sergeych	f4375ad627	lyngweb: add Maven publishing configuration, range iterability tests, and minor editor refinements	2025-11-22 01:22:39 +01:00
sergeych	faead76688	lyngweb: introduce reusable editor and highlighting utilities	2025-11-22 00:34:45 +01:00
sergeych	72c6dc2bde	fixed wrong line report on throw statement	2025-11-21 17:18:59 +01:00
sergeych	a229f227e1	tryling: better error reporting	2025-11-21 09:44:48 +01:00
sergeych	01632dc6d7	tryling: snart mini-editor	2025-11-21 02:00:01 +01:00
sergeych	4e37d0be26	tryling cosmetics	2025-11-21 00:45:18 +01:00
sergeych	fa3fda144b	added tryling, v0	2025-11-21 00:38:43 +01:00
sergeych	2b320ab52a	restructured site: split to separate sources. Search improved	2025-11-20 19:06:15 +01:00
sergeych	f1e978599c	deployment refined	2025-11-20 01:17:56 +01:00
sergeych	215c7245a0	Enhance site navigation with improved search highlighting, refined navbar offset handling, query-based search term extraction, and additional docs layout adjustments. Also, add new resources and simplify deployment script paths.	2025-11-20 01:00:32 +01:00
sergeych	d307ed2a04	inject back button inline for docs' H1 headers, fetch markdown titles progressively, and add deployment script	2025-11-19 23:56:31 +01:00
sergeych	b82af3dceb	site search	2025-11-19 23:22:12 +01:00
sergeych	1fadc42414	added DocsPage, improved navbar with dynamic height handling, MathJax integration, new TOC features, and extensive markdown processing	2025-11-19 21:52:58 +01:00
sergeych	918534afb5	fixed highlighting and styles	2025-11-19 17:52:48 +01:00
sergeych	646a676b3e	added scrollspy for TOC highlighting, theme toggle support, and dark/light mode handling	2025-11-19 14:23:07 +01:00
sergeych	f4d1a77496	added extensive markdown rendering tests and Kotlin/JS externals for `marked` library	2025-11-18 23:10:22 +01:00
sergeych	67e4d76f59	kotlin upgraded, site started	2025-11-18 00:24:19 +01:00
sergeych	beb462fd62	readme fix	2025-11-17 15:45:37 +01:00
sergeych	88f035beb6	version bump	2025-11-17 15:25:26 +01:00
sergeych	41657b3558	another MI bug fixed, added tests for MI serialization	2025-11-17 15:09:02 +01:00
sergeych	1e6dd89778	added test for scope locality	2025-11-17 14:15:38 +01:00
sergeych	6eabcc315f	fixed errors	2025-11-17 14:08:32 +01:00
sergeych	aeeec2d417	added Multiple Inheritance	2025-11-17 00:28:07 +01:00
sergeych	882df67909	added new performance flags, extended PIC handling to size 4, introduced fast paths for ObjFastIntRangeIterator, small-arity arguments, index access, and unary operations	2025-11-16 00:17:15 +01:00
sergeych	0798bbee9b	version bump, added parallel execution tests	2025-11-15 10:45:33 +01:00
sergeych	5df923920c	more test for apply	2025-11-12 13:01:35 +01:00
sergeych	76d89b43db	added bitwise operators and shift support, updated parser, compiler, and docs. fixed copyright.	2025-11-12 12:57:35 +01:00
sergeych	852383e3b1	fixed execution on JS and native platforms	2025-11-12 10:32:11 +01:00
sergeych	28e8648794	fix to make it build on all platforms	2025-11-11 23:20:22 +01:00
sergeych	d2a930c0e8	further optimizations: improve PIC miss caching and add fast paths for string, char, and numeric operations	2025-11-11 22:51:03 +01:00
sergeych	0eea73c118	further optimizations	2025-11-11 22:04:04 +01:00
sergeych	fdb056e78e	big optimization	2025-11-11 21:22:10 +01:00
sergeych	dc3000e9f7	version bump, better diagnostic on unknown object serialization	2025-11-11 15:40:00 +01:00
sergeych	e8f0846840	nicrooptimizations	2025-11-10 23:59:51 +01:00
sergeych	2af5852d44	JVM multithreaded scope pool now turned on by default	2025-11-10 23:08:58 +01:00
sergeych	38c1b3c209	big optimization round	2025-11-10 22:14:21 +01:00
sergeych	029fde2883	more optimizations	2025-11-10 02:14:18 +01:00
sergeych	1498140892	further locals optimization	2025-11-10 01:35:15 +01:00
sergeych	0b9e94c6e9	v0.10.1-SNAPSHOT optimization: Accessor refactored now use more effective ObjRef and slots for locals	2025-11-09 23:19:02 +01:00
sergeych	6ca3e4589e	fixed errors with some exception object naming and serialization	2025-11-07 02:52:15 +04:00
`@@ -1,3 +1,4 @@`
		`[//]: # (excludeFromIndex)`


	`Provide:`	`Provide:`