fixed fromatter, plugin, site, libs for new language features

Improve property accessor indentation handling, add tests, and enhance nested control flow formatting. Fix enum and property keyword highlighting.
Implement restricted setter visibility (private set / protected set) for class fields and properties.
2026-01-04 01:25:16 +01:00 · 2026-01-04 00:09:47 +01:00 · 2026-01-03 23:38:53 +01:00 · 2026-01-03 22:05:29 +01:00 · 2026-01-03 21:06:09 +01:00 · 2026-01-03 21:05:56 +01:00
235 changed files with 23095 additions and 1774 deletions
@@ -0,0 +1 @@
 *.zip filter=lfs diff=lfs merge=lfs -text
@@ -16,3 +16,7 @@ xcuserdata
 /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>
@@ -1,3 +1,20 @@
 <!--
  ~ 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>
@@ -17,8 +34,11 @@
    </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>
@@ -2,6 +2,44 @@
 ### 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`.
 - Language: Restricted Setter Visibility
  - Support for `private set` and `protected set` modifiers on `var` fields and properties.
  - Allows members to be publicly readable but only writable from within the declaring class or its subclasses.
  - Enforcement at runtime: throws `AccessException` on unauthorized writes.
  - Supported only for declarations in class bodies (fields and properties).
  - Documentation: New "Restricted Setter Visibility" section in `docs/OOP.md`.
 - Language: Late-initialized `val` fields in classes
  - Support for declaring `val` without an immediate initializer in class bodies.
  - Compulsory initialization: every late-init `val` must be assigned at least once within the class body or an `init` block.
  - Write-once enforcement: assigning to a `val` is allowed only if its current value is `Unset`.
  - Access protection: reading a late-init `val` before it is assigned returns the `Unset` singleton; using `Unset` for most operations throws an `UnsetException`.
  - Extension properties do not support late-init.
  - Documentation: New "Late-initialized `val` fields" and "The `Unset` singleton" sections in `docs/OOP.md`.
 - Docs: OOP improvements
  - 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.
@@ -43,3 +81,29 @@
 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.
  - Fix: Property accessors (`get`, `set`, `private set`, `protected set`) are now correctly indented relative to the property declaration.
  - Fix: Indentation now correctly carries over into blocks that start on extra‑indented lines (e.g., nested `if` statements or property accessor bodies).
 - 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.
@@ -1,16 +1,18 @@
 # Lyng: modern scripting for kotlin multiplatform
-Please visit the project homepage: [https://lynglang.com](https://lynglang.com)
+Please visit the project homepage: [https://lynglang.com](https://lynglang.com) and a [telegram channel](https://t.me/lynglang) for updates.
 A KMP library and a standalone interpreter. v1.0.0-SNAPSHOT is now available.
 - simple, compact, intuitive and elegant modern code:
-```
+```lyng
-class Point(x,y) {
+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)
@@ -39,8 +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
@@ -117,6 +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/++.
@@ -136,21 +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" - done!
 Planned autumn 2025. Complete dynamic language with sufficient standard library:
 Ready features:
@@ -175,23 +190,32 @@ Ready features:
 - [x] better stack reporting
 - [x] regular exceptions + extended `when`
 - [x] multiple inheritance for user classes
 - [x] class properties (accessors)
-## plan: v1.0 - v1.5 Stability, integration, optimizations
+## plan: towards v1.5 Enhancing
 - [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
- [ ] JVM bytecode 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.
+
 ## 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
@@ -27,10 +27,62 @@ function checkState() {
 }
 # 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@lynglang.com # host to deploy to
+    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
    ;;
@@ -46,15 +98,35 @@ esac
 die() { echo "ERROR: $*" 1>&2 ; exit 1; }
-./gradlew site:clean site:jsBrowserDistribution || die "compilation failed"
+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 .)
 }
-if [[ $? != 0 ]]; then
+# Update the IDEA plugin download link in docs (temporarily), then build, then restore the doc
 refreshTextmateZip
 updateIdeaPluginDownloadLink || echo "WARN: proceeding without updating IDEA plugin download link"
 ./gradlew site:jsBrowserDistribution
 BUILD_RC=$?
 # 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
@@ -77,8 +149,8 @@ rsync -e "ssh -p ${SSH_PORT}" -avz -r -d --delete ${SRC}/* ${SSH_HOST}:${ROOT}/b
 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 private_data/* ${SSH_HOST}:${ROOT}/build/private_data
+rsync -e "ssh -p ${SSH_PORT}" -avz -r -d --delete distributables/* ${SSH_HOST}:${ROOT}/build/dist/distributables
-#checkState
+checkState
 echo
 echo finalizing the deploy...
@@ -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
@@ -23,6 +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
@@ -172,7 +172,7 @@ Maps and entries can also be merged with `+` and `+=`:
 Notes:
 - Map literals always use string keys (identifier keys are converted to strings).
- Spreads inside map literals and `+`/`+=` merges require string keys on the right-hand side; this aligns with named-argument splats.
+- Spreads inside map literals and `+`/`+=` merges allow any objects as keys.
- When you need computed or non-string keys, use the constructor form `Map(...)` or build entries with `=>` and then merge.
+- 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 +42,114 @@ 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.
 ### Lazy Properties with `cached`
 When you want to define a property that is computed only once (on demand) and then remembered, use the built-in `cached` function. This is more efficient than a regular property with `get()` if the computation is expensive, as it avoids re-calculating the value on every access.
 ```kotlin
 class DataService(val id: Int) {
    // The lambda passed to cached is only executed once, the first time data() is called.
    val data = cached {
        println("Fetching data for " + id)
        // Perform expensive operation
        "Record " + id
    }
 }
 val service = DataService(42)
 // No printing yet
 println(service.data()) // Prints "Fetching data for 42", then returns "Record 42"
 println(service.data()) // Returns "Record 42" immediately (no second fetch)
 ```
 Note that `cached` returns a lambda, so you access the value by calling it like a method: `service.data()`. This is a powerful pattern for lazy-loading resources, caching results of database queries, or delaying expensive computations until they are truly needed.
 ## 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 +161,58 @@ 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.
 ### Late-initialized `val` fields
 You can declare a `val` field without an immediate initializer if you provide an assignment for it within an `init` block or the class body. This is useful when the initial value depends on logic that cannot be expressed in a single expression.
 ```kotlin
 class DataProcessor(data: Object) {
    val result: Object
    init {
        // Complex initialization logic
        result = transform(data)
    }
 }
 ```
 Key rules for late-init `val`:
 - **Compile-time Check**: The compiler ensures that every `val` declared without an initializer in a class body has at least one assignment within that class body (including `init` blocks). Failing to do so results in a syntax error.
 - **Write-Once**: A `val` can only be assigned once. Even if it was declared without an initializer, once it is assigned a value (e.g., in `init`), any subsequent assignment will throw an `IllegalAssignmentException`.
 - **Access before Initialization**: If you attempt to read a late-init `val` before it has been assigned (for example, by calling a method in `init` that reads the field before its assignment), it will hold a special `Unset` value. Using `Unset` for most operations (like arithmetic or method calls) will throw an `UnsetException`.
 - **No Extensions**: Extension properties do not support late initialization as they do not have per-instance storage. Extension `val`s must always have an initializer or a `get()` accessor.
 ### The `Unset` singleton
 The `Unset` singleton represents a field that has been declared but not yet initialized. While it can be compared and converted to a string, most other operations on it are forbidden to prevent accidental use of uninitialized data.
 ```kotlin
 class T {
    val x
    fun check() {
        if (x == Unset) println("Not ready")
    }
    init {
        check() // Prints "Not ready"
        x = 42
    }
 }
 ```
 ## Methods
 Functions defined inside a class body are methods, and unless declared
@@ -164,6 +326,80 @@ Compatibility notes:
 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:
@@ -196,6 +432,69 @@ Are declared with var
    assert( p.isSpecial == true )
    >>> void
 ### Restricted Setter Visibility
 You can restrict the visibility of a `var` field's or property's setter by using `private set` or `protected set` modifiers. This allows the member to be publicly readable but only writable from within the class or its subclasses.
 #### On Fields
 ```kotlin
 class SecretCounter {
    var count = 0
        private set // Can be read anywhere, but written only in SecretCounter
    fun increment() { count++ }
 }
 val c = SecretCounter()
 println(c.count) // OK
 c.count = 10     // Throws AccessException
 c.increment()    // OK
 ```
 #### On Properties
 You can also apply restricted visibility to custom property setters:
 ```kotlin
 class Person(private var _age: Int) {
    var age
        get() = _age
        private set(v) { if (v >= 0) _age = v }
 }
 ```
 #### Protected Setters and Inheritance
 A `protected set` allows subclasses to modify a field that is otherwise read-only to the public:
 ```kotlin
 class Base {
    var state = "initial"
        protected set
 }
 class Derived : Base() {
    fun changeState(newVal) {
        state = newVal // OK: protected access from subclass
    }
 }
 val d = Derived()
 println(d.state) // OK: "initial"
 d.changeState("updated")
 println(d.state) // OK: "updated"
 d.state = "bad"  // Throws AccessException: public write not allowed
 ```
 ### Key Rules and Limitations
 - **Only for `var`**: Restricted setter visibility cannot be used with `val` declarations, as they are inherently read-only. Attempting to use it with `val` results in a syntax error.
 - **Class Body Only**: These modifiers can only be used on members declared within the class body. They are not supported for primary constructor parameters.
 - **`private set`**: The setter is only accessible within the same class context (specifically, when `this` is an instance of that class).
 - **`protected set`**: The setter is accessible within the declaring class and all its transitive subclasses.
 - **Multiple Inheritance**: In MI scenarios, visibility is checked against the class that actually declared the member. Qualified access (e.g., `this@Base.field = value`) also respects restricted setter visibility.
 ### Private fields
 Private fields are visible only _inside the class instance_:
@@ -315,9 +614,11 @@ 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) {
@@ -342,10 +643,67 @@ 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
@@ -526,3 +884,8 @@ 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)
@@ -1,5 +1,7 @@
 # Declaring arguments in Lyng
 [//]: # (topMenu)
 It is a common thing that occurs in many places in Lyng, function declarations, 
 lambdas and class declarations.
@@ -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],
@@ -98,41 +107,53 @@ There could be any number of splats at any positions. You can splat any other [I
 ## Named arguments in calls
-Lyng supports named arguments at call sites using colon syntax `name: value`:
+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="foo", b="bar", c="bazz") { [a, b, c] }
+    fun test(a, b, c) { [a, b, c] }
-    assertEquals(["foo", "b", "bazz"], test(b: "b"))
+    val a = 1
-    assertEquals(["a", "bar", "c"], test("a", c: "c"))
+    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:))
 ```
-Rules:
+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. Declarations continue to use `:` for types, while call sites use `as` / `as?` for type operations.
+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:
+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 r = test("A?", ...Map("d" => "D!", "b" => "B!"))
    assertEquals(["A?","B!","c","D!"], r)
 ```
-The same with a map literal is often more concise. Define the literal, then splat the variable:
+    val b = "B!"
    val d = "D!"
    // Auto-substitution in map literal:
    val patch = { d:, b: }
    fun test(a="a", b="b", c="c", d="d") { [a, b, c, d] }
    val patch = { d: "D!", b: "B!" }
    val r = test("A?", ...patch)
    assertEquals(["A?","B!","c","D!"], r)
-    >>> void
+```
 Constraints:
@@ -153,3 +174,4 @@ If a call is immediately followed by a block `{ ... }`, it is treated as an extr
 [tutorial]: tutorial.md
 [List]: List.md
@@ -109,7 +109,62 @@ scope.eval("val y = inc(41); log('Answer:', y)")
 You can register multiple names (aliases) at once: `addFn<ObjInt>("inc", "increment") { ... }`.
-### 5) Read variable values back in Kotlin
+### 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.
@@ -124,7 +179,7 @@ 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.
-### 6) Execute scripts with parameters; call Lyng functions from Kotlin
+### 8) Execute scripts with parameters; call Lyng functions from Kotlin
 There are two convenient patterns.
@@ -157,7 +212,7 @@ 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`.
-### 7) Create your own packages and import them in Lyng
+### 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 ...`.
@@ -212,7 +267,7 @@ val s = scope.eval("s").toKotlin(scope) // -> 144
 You can also register from parsed `Source` instances via `addSourcePackages(source)`.
-### 8) Executing from files, security, and isolation
+### 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.
@@ -223,7 +278,7 @@ You can also register from parsed `Source` instances via `addSourcePackages(sour
 val isolated = net.sergeych.lyng.Scope.new()
 ```
-### 9) Tips and troubleshooting
+### 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.
@@ -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.
@@ -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.
@@ -219,3 +221,22 @@ Lyng includes an optional optimization for function/method calls on JVM: scope f
 - 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)
@@ -1,6 +1,8 @@
 # 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:
@@ -1,4 +1,7 @@
-# Named arguments proposal
+# 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.
@@ -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()) )
 }
@@ -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)
@@ -0,0 +1,95 @@
 # 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.
 ## Practical Example: `cached`
 The `cached` function (defined in `lyng.stdlib`) is a classic example of using closures to maintain state. It wraps a builder into a zero-argument function that computes once and remembers the result:
 ```kotlin
 fun cached(builder) {
    var calculated = false
    var value = null
    { // This lambda captures `calculated`, `value`, and `builder`
        if( !calculated ) {
            value = builder()
            calculated = true
        }
        value
    }
 }
 ```
 Because Lyng now correctly isolates closures for each evaluation of a lambda literal, using `cached` inside a class instance works as expected: each instance maintains its own private `calculated` and `value` state, even if they share the same property declaration.
 ## 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.
@@ -6,9 +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), [the `when` statement](when.md)
 - [Testing and Assertions](Testing.md)
 - [time](time.md) and [parallelism](parallelism.md)
 - [parallelism] - multithreaded code, coroutines, etc.
 - Some class
@@ -66,6 +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
@@ -86,6 +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:
@@ -205,7 +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)
@@ -291,8 +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
@@ -309,7 +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:
@@ -383,6 +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:
@@ -458,6 +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) {
@@ -1358,30 +1427,31 @@ Part match:
 Typical set of String functions includes:
-| fun/prop           | description / notes                                        |
+| 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                            |
+| trim()               | trim space chars from both ends                            |
-| startsWith(prefix) | true if starts with a prefix                               |
+| startsWith(prefix)   | true if starts with a prefix                               |
-| endsWith(prefix)   | true if ends with a prefix                                 |
+| endsWith(prefix)     | true if ends with a prefix                                 |
-| take(n)            | get a new string from up to n first characters             |
+| last()               | get last character of a string or throw                    |
-| takeLast(n)        | get a new string from up to n last characters              |
+| take(n)              | get a new string from up to n first characters             |
-| drop(n)            | get a new string dropping n first chars, or empty string   |
+| takeLast(n)          | get a new string from up to n last characters              |
-| dropLast(n)        | get a new string dropping n last chars, or empty string    |
+| drop(n)              | get a new string dropping n first chars, or empty string   |
-| size               | size in characters like `length` because String is [Array] |
+| dropLast(n)          | get a new string dropping n last chars, or empty string    |
-| (args...)          | sprintf-like formatting, see [string formatting]           |
+| size                 | size in characters like `length` because String is [Array] |
-| [index]            | character at index                                         | 
+| (args...)            | sprintf-like formatting, see [string formatting]           |
-| [Range]            | substring at range (2)                                     |
+| [index]              | character at index                                         | 
-| [Regex]            | find first match of regex, like [Regex.find] (2)           |
+| [Range]              | substring at range (2)                                     |
-| s1 + s2            | concatenation                                              |
+| [Regex]              | find first match of regex, like [Regex.find] (2)           |
-| s1 += s2           | self-modifying concatenation                               |
+| s1 + s2              | concatenation                                              |
-| toReal()           | attempts to parse string as a Real value                   |
+| s1 += s2             | self-modifying concatenation                               |
-| toInt()            | parse string to Int value                                  |
+| toReal()             | attempts to parse string as a Real value                   |
-| characters()       | create [List] of characters (1)                            |
+| toInt()              | parse string to Int value                                  |
-| encodeUtf8()       | returns [Buffer] with characters encoded to utf8           |
+| characters()         | create [List] of characters (1)                            |
-| matches(re)        | matches the regular expression (2)                         |
+| encodeUtf8()         | returns [Buffer] with characters encoded to utf8           |
-|                    |                                                            |
+| matches(re)          | matches the regular expression (2)                         |
 |                      |                                                            |
 (1)
 : List is mutable therefore a new copy is created on each call.
@@ -1427,7 +1497,7 @@ See [math functions](math.md). Other general purpose functions are:
 | print(args...)                        | Open for overriding, it prints to stdout without newline.  |
 | flow {}                               | create flow sequence, see [parallelism]                    |
 | delay, launch, yield                  | see [parallelism]                                          |
-| cached(builder)                       | remembers builder() on first invocation and return it then |
+| cached(builder)                       | [Lazy evaluation with `cached`](#lazy-evaluation-with-cached) |
 | let, also, apply, run                 | see above, flow controls                                   |
 (1)
@@ -1445,6 +1515,8 @@ Lambda avoid unnecessary execution if assertion is not failed. for example:
 [List]: List.md
 [Testing]: Testing.md
 [Iterable]: Iterable.md
 [Iterator]: Iterator.md
@@ -1473,6 +1545,50 @@ Lambda avoid unnecessary execution if assertion is not failed. for example:
 [Regex]: Regex.md
 ## Lazy evaluation with `cached`
 Sometimes you have an expensive computation that you only want to perform if and when it is actually needed, and then remember (cache) the result for all future calls. Lyng provides the `cached(builder)` function for this purpose.
 It is extremely simple to use: you pass it a block (lambda) that performs the computation, and it returns a zero-argument function that manages the caching for you.
 ### Basic Example
 ```kotlin
 val expensive = cached {
    println("Performing expensive calculation...")
    2 + 2
 }
 println(expensive()) // Prints "Performing expensive calculation..." then "4"
 println(expensive()) // Prints only "4" (result is cached)
 ```
 ### Benefits and Simplicity
 1.  **Lazy Execution:** The code inside the `cached` block doesn't run until you actually call the resulting function.
 2.  **Automatic State Management:** You don't need to manually check if a value has been computed or store it in a separate variable.
 3.  **Closures and Class Support:** `cached` works perfectly with closures. If you use it inside a class, it will correctly capture the instance variables, and each instance will have its own independent cache.
 ### Use Case: Lazy Properties in Classes
 This is the most common use case for `cached`. It allows you to define expensive "fields" that are only computed if someone actually uses them:
 ```kotlin
 class User(val id: Int) {
    // The details will be fetched only once, on demand
    val details = cached {
        println("Fetching details for user " + id)
        // Db.query is a hypothetical example
        Db.query("SELECT * FROM users WHERE id = " + id)
    }
 }
 val u = User(101)
 // ... nothing happens yet ...
 val d = u.details() // Computation happens here
 val sameD = u.details() // Returns the same result immediately
 ```
 ## 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.
@@ -1533,7 +1649,31 @@ 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. Qualification (`this@Type`) or casts do not bypass visibility.
+- `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.
-To get details on OOP in Lyng, see [OOP notes](oop.md).
+## 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 +1,110 @@
 # What's New in Lyng
 This document highlights the latest additions and improvements to the Lyng language and its ecosystem.
 ## Language Features
 ### Class Properties with Accessors
 Classes now support properties with custom `get()` and `set()` accessors. Properties in Lyng do **not** have automatic backing fields; they are pure accessors.
 ```lyng
 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(v) {
            if (v >= 0) _age = v
        }
 }
 ```
 ### Private and Protected Setters
 You can now restrict the visibility of a property's or field's setter using `private set` or `protected set`. This allows members to be publicly readable but only writable from within the declaring class or its subclasses.
 ```lyng
 class Counter {
    var count = 0
        private set  // Field with private setter
    fun increment() { count++ }
 }
 class AdvancedCounter : Counter {
    var totalOperations = 0
        protected set // Settable here and in further subclasses
 }
 let c = Counter()
 c.increment() // OK
 // c.count = 10 // Error: setter is private
 ```
 ### Late-initialized `val` Fields
 `val` fields in classes can be declared without an immediate initializer, provided they are assigned exactly once. If accessed before initialization, they hold the special `Unset` singleton.
 ```lyng
 class Service {
    val logger
    fun check() {
        if (logger == Unset) println("Not initialized yet")
    }
    init {
        logger = Logger("Service")
    }
 }
 ```
 ### Named Arguments and Named Splats
 Function calls now support named arguments using the `name: value` syntax. If the variable name matches the parameter name, you can use the `name:` shorthand.
 ```lyng
 fun greet(name, greeting = "Hello") {
    println("$greeting, $name!")
 }
 val name = "Alice"
 greet(name:)                  // Shorthand for greet(name: name)
 greet(greeting: "Hi", name: "Bob")
 let params = { name: "Charlie", greeting: "Hey")
 greet(...params)              // Named splat expansion
 ```
 ### Multiple Inheritance (MI)
 Lyng now supports multiple inheritance using the C3 Method Resolution Order (MRO). Use `this@Type` or casts for disambiguation.
 ```lyng
 class A { fun foo() = "A" }
 class B { fun foo() = "B" }
 class Derived : A, B {
    fun test() {
        println(foo())              // Resolves to A.foo (leftmost)
        println(this@B.foo())       // Qualified dispatch to B.foo
    }
 }
 let d = Derived()
 println((d as B).foo())             // Disambiguation via cast
 ```
 ## Tooling and Infrastructure
 ### CLI: Formatting Command
 A new `fmt` subcommand has been added to the Lyng CLI.
 ```bash
 lyng fmt MyFile.lyng             # Print formatted code to stdout
 lyng fmt --in-place MyFile.lyng  # Format file in-place
 lyng fmt --check MyFile.lyng     # Check if file needs formatting
 ```
 ### IDEA Plugin: Autocompletion
 Experimental lightweight autocompletion is now available in the IntelliJ plugin. It features type-aware member suggestions and inheritance-aware completion.
 You can enable it in **Settings | Lyng Formatter | Enable Lyng autocompletion**.
@@ -1,5 +1,7 @@
 # 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.
@@ -76,8 +76,8 @@
    },
    "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}_]*)", "captures": { "1": { "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}_]*)", "captures": { "1": { "name": "variable.other.declaration.lyng" } } } ] },
+    "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)\\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" } ] },
+    "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": "[!?]" } ] },
@@ -32,6 +32,9 @@ 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 JDK 17 which includes `jlink`.
+# :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=/usr/lib/jvm/java-17-openjdk-amd64
+#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 = "2.2.21"
+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 +1,200 @@
 /*
 * 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)
                if (file.context == null) {
                    try {
                        CodeStyleManager.getInstance(project).adjustLineIndent(file, prevStart)
                    } catch (e: Exception) {
                        log.warn("Failed to adjust line indent for previous line: ${e.message}")
                    }
                }
                // 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)
        if (file.context == null) {
            try {
                CodeStyleManager.getInstance(project).adjustLineIndent(file, currentStart)
            } catch (e: Exception) {
                log.warn("Failed to adjust line indent for current line: ${e.message}")
            }
        }
        // Fallback: if the platform didn't physically insert indentation, compute it from our formatter and apply
        val lineStart = doc.getLineStartOffset(currentLine)
        val lineEnd = doc.getLineEndOffset(currentLine)
        val desiredIndent = computeDesiredIndent(project, doc, currentLine)
        val firstNonWs = findFirstNonWs(doc, lineStart, lineEnd)
        val currentIndentLen = firstNonWs - lineStart
        if (desiredIndent.isNotEmpty() || currentIndentLen != 0) {
            // Replace existing leading whitespace to match desired indent exactly
            val replaceFrom = lineStart
            val replaceTo = lineStart + currentIndentLen
            if (doc.getText(TextRange(replaceFrom, replaceTo)) != desiredIndent) {
                com.intellij.openapi.command.WriteCommandAction.runWriteCommandAction(project) {
                    doc.replaceString(replaceFrom, replaceTo, desiredIndent)
                }
                PsiDocumentManager.getInstance(project).commitDocument(doc)
                if (log.isDebugEnabled) {
                    val dbg = desiredIndent.replace("\t", "\\t")
                    log.debug("[LyngEnter] rewrote current line leading WS to '$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 +1,138 @@
 /*
 * 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)
                if (file.context == null) {
                    try {
                        CodeStyleManager.getInstance(project).adjustLineIndent(file, lineStart)
                    } catch (e: Exception) {
                        log.warn("Failed to adjust line indent for current line: ${e.message}")
                    }
                }
            }
        } 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)
                if (file.context == null) {
                    try {
                        CodeStyleManager.getInstance(project).adjustLineIndent(file, lineStart)
                    } catch (e: Exception) {
                        log.warn("Failed to adjust line indent for comment: ${e.message}")
                    }
                }
                // 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 +1,166 @@
 /*
 * 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.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
            if (file.context == null) {
                try {
                    CodeStyleManager.getInstance(project).adjustLineIndent(file, lineStart)
                } catch (e: Exception) {
                    // Log as debug because this can be called many times during reformat
                    // and we don't want to spam warnings if it's a known platform issue with injections
                }
            }
            // 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
 }
@@ -0,0 +1,129 @@
 /*
 * 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.settings
 import com.intellij.openapi.components.PersistentStateComponent
 import com.intellij.openapi.components.Service
 import com.intellij.openapi.components.State
 import com.intellij.openapi.components.Storage
 import com.intellij.openapi.project.Project
@Service(Service.Level.PROJECT)
@State(name = "LyngFormatterSettings", storages = [Storage("lyng_idea.xml")])
 class LyngFormatterSettings(private val project: Project) : PersistentStateComponent<LyngFormatterSettings.State> {
    data class State(
        var enableSpacing: Boolean = false,
        var enableWrapping: Boolean = false,
        var reindentClosedBlockOnEnter: Boolean = true,
        var reindentPastedBlocks: Boolean = true,
        var normalizeBlockCommentIndent: Boolean = false,
        var spellCheckStringLiterals: Boolean = true,
        // When Grazie/Natural Languages is present, prefer it for comments and literals (avoid legacy duplicates)
        var preferGrazieForCommentsAndLiterals: Boolean = true,
        // When Grazie is available, also check identifiers via Grazie.
        // Default OFF because Grazie typically doesn't flag code identifiers; legacy Spellchecker is better for code.
        var grazieChecksIdentifiers: Boolean = false,
        // Grazie-only fallback: treat identifiers as comments domain so Grazie applies spelling rules
        var grazieTreatIdentifiersAsComments: Boolean = true,
        // Grazie-only fallback: treat string literals as comments domain when LITERALS domain is not requested
        var grazieTreatLiteralsAsComments: Boolean = true,
        // Debug helper: show the exact ranges we feed to Grazie/legacy as weak warnings
        var debugShowSpellFeed: Boolean = false,
        // Visuals: render Lyng typos using the standard Typo green underline styling
        var showTyposWithGreenUnderline: Boolean = true,
        // Enable lightweight quick-fixes (Replace..., Add to dictionary) without legacy Spell Checker
        var offerLyngTypoQuickFixes: Boolean = true,
        // Per-project learned words (do not flag again)
        var learnedWords: MutableSet<String> = mutableSetOf(),
        // Experimental: enable Lyng autocompletion (can be disabled if needed)
        var enableLyngCompletionExperimental: Boolean = true,
    )
    private var myState: State = State()
    override fun getState(): State = myState
    override fun loadState(state: State) {
        myState = state
    }
    var enableSpacing: Boolean
        get() = myState.enableSpacing
        set(value) { myState.enableSpacing = value }
    var enableWrapping: Boolean
        get() = myState.enableWrapping
        set(value) { myState.enableWrapping = value }
    var reindentClosedBlockOnEnter: Boolean
        get() = myState.reindentClosedBlockOnEnter
        set(value) { myState.reindentClosedBlockOnEnter = value }
    var reindentPastedBlocks: Boolean
        get() = myState.reindentPastedBlocks
        set(value) { myState.reindentPastedBlocks = value }
    var normalizeBlockCommentIndent: Boolean
        get() = myState.normalizeBlockCommentIndent
        set(value) { myState.normalizeBlockCommentIndent = value }
    var spellCheckStringLiterals: Boolean
        get() = myState.spellCheckStringLiterals
        set(value) { myState.spellCheckStringLiterals = value }
    var preferGrazieForCommentsAndLiterals: Boolean
        get() = myState.preferGrazieForCommentsAndLiterals
        set(value) { myState.preferGrazieForCommentsAndLiterals = value }
    var grazieChecksIdentifiers: Boolean
        get() = myState.grazieChecksIdentifiers
        set(value) { myState.grazieChecksIdentifiers = value }
    var grazieTreatIdentifiersAsComments: Boolean
        get() = myState.grazieTreatIdentifiersAsComments
        set(value) { myState.grazieTreatIdentifiersAsComments = value }
    var grazieTreatLiteralsAsComments: Boolean
        get() = myState.grazieTreatLiteralsAsComments
        set(value) { myState.grazieTreatLiteralsAsComments = value }
    var debugShowSpellFeed: Boolean
        get() = myState.debugShowSpellFeed
        set(value) { myState.debugShowSpellFeed = value }
    var showTyposWithGreenUnderline: Boolean
        get() = myState.showTyposWithGreenUnderline
        set(value) { myState.showTyposWithGreenUnderline = value }
    var offerLyngTypoQuickFixes: Boolean
        get() = myState.offerLyngTypoQuickFixes
        set(value) { myState.offerLyngTypoQuickFixes = value }
    var learnedWords: MutableSet<String>
        get() = myState.learnedWords
        set(value) { myState.learnedWords = value }
    var enableLyngCompletionExperimental: Boolean
        get() = myState.enableLyngCompletionExperimental
        set(value) { myState.enableLyngCompletionExperimental = value }
    companion object {
        @JvmStatic
        fun getInstance(project: Project): LyngFormatterSettings = project.getService(LyngFormatterSettings::class.java)
    }
 }
@@ -0,0 +1,149 @@
 /*
 * 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.settings
 import com.intellij.openapi.options.Configurable
 import com.intellij.openapi.project.Project
 import javax.swing.BoxLayout
 import javax.swing.JCheckBox
 import javax.swing.JComponent
 import javax.swing.JPanel
 class LyngFormatterSettingsConfigurable(private val project: Project) : Configurable {
    private var panel: JPanel? = null
    private var spacingCb: JCheckBox? = null
    private var wrappingCb: JCheckBox? = null
    private var reindentClosedBlockCb: JCheckBox? = null
    private var reindentPasteCb: JCheckBox? = null
    private var normalizeBlockCommentIndentCb: JCheckBox? = null
    private var spellCheckLiteralsCb: JCheckBox? = null
    private var preferGrazieCommentsLiteralsCb: JCheckBox? = null
    private var grazieChecksIdentifiersCb: JCheckBox? = null
    private var grazieIdsAsCommentsCb: JCheckBox? = null
    private var grazieLiteralsAsCommentsCb: JCheckBox? = null
    private var debugShowSpellFeedCb: JCheckBox? = null
    private var showTyposGreenCb: JCheckBox? = null
    private var offerQuickFixesCb: JCheckBox? = null
    private var enableCompletionCb: JCheckBox? = null
    override fun getDisplayName(): String = "Lyng Formatter"
    override fun createComponent(): JComponent {
        val p = JPanel()
        p.layout = BoxLayout(p, BoxLayout.Y_AXIS)
        spacingCb = JCheckBox("Enable spacing normalization (commas/operators/colons/keyword parens)")
        wrappingCb = JCheckBox("Enable line wrapping (120 cols) [experimental]")
        reindentClosedBlockCb = JCheckBox("Reindent enclosed block on Enter after '}'")
        reindentPasteCb = JCheckBox("Reindent pasted blocks (align pasted code to current indent)")
        normalizeBlockCommentIndentCb = JCheckBox("Normalize block comment indentation [experimental]")
        spellCheckLiteralsCb = JCheckBox("Spell check string literals (skip % specifiers like %s, %d, %-12s)")
        preferGrazieCommentsLiteralsCb = JCheckBox("Prefer Natural Languages/Grazie for comments and string literals (avoid duplicates)")
        grazieChecksIdentifiersCb = JCheckBox("Check identifiers via Natural Languages/Grazie when available")
        grazieIdsAsCommentsCb = JCheckBox("Natural Languages/Grazie: treat identifiers as comments (forces spelling checks in 2024.3)")
        grazieLiteralsAsCommentsCb = JCheckBox("Natural Languages/Grazie: treat string literals as comments when literals are not processed")
        debugShowSpellFeedCb = JCheckBox("Debug: show spell-feed ranges (weak warnings)")
        showTyposGreenCb = JCheckBox("Show Lyng typos with green underline (TYPO styling)")
        offerQuickFixesCb = JCheckBox("Offer Lyng typo quick fixes (Replace…, Add to dictionary) without Spell Checker")
        enableCompletionCb = JCheckBox("Enable Lyng autocompletion (experimental)")
        // Tooltips / short help
        spacingCb?.toolTipText = "Applies minimal, safe spacing (e.g., around commas/operators, control-flow parens)."
        wrappingCb?.toolTipText = "Experimental: wrap long argument lists to keep lines under ~120 columns."
        reindentClosedBlockCb?.toolTipText = "On Enter after a closing '}', reindent the just-closed {…} block using formatter rules."
        reindentPasteCb?.toolTipText = "When caret is in leading whitespace, reindent the pasted text and align it to the caret's indent."
        normalizeBlockCommentIndentCb?.toolTipText = "Experimental: normalize indentation inside /* … */ comments (code is not modified)."
        preferGrazieCommentsLiteralsCb?.toolTipText = "When ON and Natural Languages/Grazie is installed, comments and string literals are checked by Grazie. Turn OFF to force legacy Spellchecker to check them."
        grazieChecksIdentifiersCb?.toolTipText = "When ON and Natural Languages/Grazie is installed, identifiers (non-keywords) are checked by Grazie too."
        grazieIdsAsCommentsCb?.toolTipText = "Grazie-only fallback: route identifiers as COMMENTS domain so Grazie applies spelling in 2024.3."
        grazieLiteralsAsCommentsCb?.toolTipText = "Grazie-only fallback: when Grammar doesn't process literals, route strings as COMMENTS so they are checked."
        debugShowSpellFeedCb?.toolTipText = "Show the exact ranges we feed to spellcheckers (ids/comments/strings) as weak warnings."
        showTyposGreenCb?.toolTipText = "Render Lyng typos using the platform's green TYPO underline instead of generic warnings."
        offerQuickFixesCb?.toolTipText = "Provide lightweight Replace… and Add to dictionary quick-fixes without requiring the legacy Spell Checker."
        enableCompletionCb?.toolTipText = "Turn on/off the lightweight Lyng code completion (BASIC)."
        p.add(spacingCb)
        p.add(wrappingCb)
        p.add(reindentClosedBlockCb)
        p.add(reindentPasteCb)
        p.add(normalizeBlockCommentIndentCb)
        p.add(spellCheckLiteralsCb)
        p.add(preferGrazieCommentsLiteralsCb)
        p.add(grazieChecksIdentifiersCb)
        p.add(grazieIdsAsCommentsCb)
        p.add(grazieLiteralsAsCommentsCb)
        p.add(debugShowSpellFeedCb)
        p.add(showTyposGreenCb)
        p.add(offerQuickFixesCb)
        p.add(enableCompletionCb)
        panel = p
        reset()
        return p
    }
    override fun isModified(): Boolean {
        val s = LyngFormatterSettings.getInstance(project)
        return spacingCb?.isSelected != s.enableSpacing ||
                wrappingCb?.isSelected != s.enableWrapping ||
                reindentClosedBlockCb?.isSelected != s.reindentClosedBlockOnEnter ||
                reindentPasteCb?.isSelected != s.reindentPastedBlocks ||
                normalizeBlockCommentIndentCb?.isSelected != s.normalizeBlockCommentIndent ||
                spellCheckLiteralsCb?.isSelected != s.spellCheckStringLiterals ||
                preferGrazieCommentsLiteralsCb?.isSelected != s.preferGrazieForCommentsAndLiterals ||
                grazieChecksIdentifiersCb?.isSelected != s.grazieChecksIdentifiers ||
                grazieIdsAsCommentsCb?.isSelected != s.grazieTreatIdentifiersAsComments ||
                grazieLiteralsAsCommentsCb?.isSelected != s.grazieTreatLiteralsAsComments ||
                debugShowSpellFeedCb?.isSelected != s.debugShowSpellFeed ||
                showTyposGreenCb?.isSelected != s.showTyposWithGreenUnderline ||
                offerQuickFixesCb?.isSelected != s.offerLyngTypoQuickFixes ||
                enableCompletionCb?.isSelected != s.enableLyngCompletionExperimental
    }
    override fun apply() {
        val s = LyngFormatterSettings.getInstance(project)
        s.enableSpacing = spacingCb?.isSelected == true
        s.enableWrapping = wrappingCb?.isSelected == true
        s.reindentClosedBlockOnEnter = reindentClosedBlockCb?.isSelected == true
        s.reindentPastedBlocks = reindentPasteCb?.isSelected == true
        s.normalizeBlockCommentIndent = normalizeBlockCommentIndentCb?.isSelected == true
        s.spellCheckStringLiterals = spellCheckLiteralsCb?.isSelected == true
        s.preferGrazieForCommentsAndLiterals = preferGrazieCommentsLiteralsCb?.isSelected == true
        s.grazieChecksIdentifiers = grazieChecksIdentifiersCb?.isSelected == true
        s.grazieTreatIdentifiersAsComments = grazieIdsAsCommentsCb?.isSelected == true
        s.grazieTreatLiteralsAsComments = grazieLiteralsAsCommentsCb?.isSelected == true
        s.debugShowSpellFeed = debugShowSpellFeedCb?.isSelected == true
        s.showTyposWithGreenUnderline = showTyposGreenCb?.isSelected == true
        s.offerLyngTypoQuickFixes = offerQuickFixesCb?.isSelected == true
        s.enableLyngCompletionExperimental = enableCompletionCb?.isSelected == true
    }
    override fun reset() {
        val s = LyngFormatterSettings.getInstance(project)
        spacingCb?.isSelected = s.enableSpacing
        wrappingCb?.isSelected = s.enableWrapping
        reindentClosedBlockCb?.isSelected = s.reindentClosedBlockOnEnter
        reindentPasteCb?.isSelected = s.reindentPastedBlocks
        normalizeBlockCommentIndentCb?.isSelected = s.normalizeBlockCommentIndent
        spellCheckLiteralsCb?.isSelected = s.spellCheckStringLiterals
        preferGrazieCommentsLiteralsCb?.isSelected = s.preferGrazieForCommentsAndLiterals
        grazieChecksIdentifiersCb?.isSelected = s.grazieChecksIdentifiers
        grazieIdsAsCommentsCb?.isSelected = s.grazieTreatIdentifiersAsComments
        grazieLiteralsAsCommentsCb?.isSelected = s.grazieTreatLiteralsAsComments
        debugShowSpellFeedCb?.isSelected = s.debugShowSpellFeed
        showTyposGreenCb?.isSelected = s.showTyposWithGreenUnderline
        offerQuickFixesCb?.isSelected = s.offerLyngTypoQuickFixes
        enableCompletionCb?.isSelected = s.enableLyngCompletionExperimental
    }
 }
@@ -0,0 +1,50 @@
 /*
 * 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.spell
 import com.intellij.openapi.diagnostic.Logger
 import com.intellij.openapi.util.Key
 import com.intellij.openapi.util.TextRange
 import com.intellij.psi.PsiFile
 /**
 * Per-file cached spellcheck index built from MiniAst-based highlighting and the lynglib highlighter.
 * It exposes identifier, comment, and string literal ranges. Strategies should suspend until data is ready.
 */
 object LyngSpellIndex {
    private val LOG = Logger.getInstance(LyngSpellIndex::class.java)
    data class Data(
        val modStamp: Long,
        val identifiers: List<TextRange>,
        val comments: List<TextRange>,
        val strings: List<TextRange>,
    )
    private val KEY: Key<Data> = Key.create("LYNG_SPELL_INDEX")
    fun getUpToDate(file: PsiFile): Data? {
        val doc = file.viewProvider.document ?: return null
        val d = file.getUserData(KEY) ?: return null
        return if (d.modStamp == doc.modificationStamp) d else null
    }
    fun store(file: PsiFile, data: Data) {
        file.putUserData(KEY, data)
        LOG.info("LyngSpellIndex built: ids=${data.identifiers.size}, comments=${data.comments.size}, strings=${data.strings.size}")
    }
 }
@@ -0,0 +1,155 @@
 /*
 * 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.spell
 // Avoid Tokenizers helper to keep compatibility; implement our own tokenizers
 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 com.intellij.spellchecker.inspections.PlainTextSplitter
 import com.intellij.spellchecker.tokenizer.SpellcheckingStrategy
 import com.intellij.spellchecker.tokenizer.TokenConsumer
 import com.intellij.spellchecker.tokenizer.Tokenizer
 import net.sergeych.lyng.idea.settings.LyngFormatterSettings
 /**
 * Spellchecking strategy for Lyng:
 * - Identifiers: checked as identifiers
 * - Comments: checked as plain text
 * - Keywords: skipped
 * - String literals: optional (controlled by settings), and we exclude printf-style format specifiers like
 *   %s, %d, %-12s, %0.2f, etc.
 */
 class LyngSpellcheckingStrategy : SpellcheckingStrategy() {
    private val log = Logger.getInstance(LyngSpellcheckingStrategy::class.java)
    @Volatile private var loggedOnce = false
    private fun grazieInstalled(): Boolean {
        // Support both historical and bundled IDs
        return PluginManagerCore.isPluginInstalled(PluginId.getId("com.intellij.grazie")) ||
                PluginManagerCore.isPluginInstalled(PluginId.getId("tanvd.grazi"))
    }
    private fun grazieApiAvailable(): Boolean = try {
        // If this class is absent (as in IC-243), third-party plugins can't run Grazie programmatically
        Class.forName("com.intellij.grazie.grammar.GrammarChecker")
        true
    } catch (_: Throwable) { false }
    override fun getTokenizer(element: PsiElement): Tokenizer<*> {
        val hasGrazie = grazieInstalled()
        val hasGrazieApi = grazieApiAvailable()
        val settings = LyngFormatterSettings.getInstance(element.project)
        if (!loggedOnce) {
            loggedOnce = true
            log.info("LyngSpellcheckingStrategy activated: hasGrazie=$hasGrazie, grazieApi=$hasGrazieApi, preferGrazieForCommentsAndLiterals=${settings.preferGrazieForCommentsAndLiterals}, spellCheckStringLiterals=${settings.spellCheckStringLiterals}, grazieChecksIdentifiers=${settings.grazieChecksIdentifiers}")
        }
        val file = element.containingFile ?: return EMPTY_TOKENIZER
        val index = LyngSpellIndex.getUpToDate(file) ?: run {
            // Suspend legacy spellcheck until MiniAst-based index is ready
            return EMPTY_TOKENIZER
        }
        val elRange = element.textRange ?: return EMPTY_TOKENIZER
        fun overlaps(list: List<TextRange>) = list.any { it.intersects(elRange) }
        // Decide responsibility per settings
        // If Grazie is present but its public API is not available (IC-243), do NOT delegate to it.
        val preferGrazie = hasGrazie && hasGrazieApi && settings.preferGrazieForCommentsAndLiterals
        val grazieIds = hasGrazie && hasGrazieApi && settings.grazieChecksIdentifiers
        // Identifiers: only if range is within identifiers index and not delegated to Grazie
        if (overlaps(index.identifiers) && !grazieIds) return IDENTIFIER_TOKENIZER
        // Comments: only if not delegated to Grazie and overlapping indexed comments
        if (!preferGrazie && overlaps(index.comments)) return COMMENT_TEXT_TOKENIZER
        // Strings: only if not delegated to Grazie, literals checking enabled, and overlapping indexed strings
        if (!preferGrazie && settings.spellCheckStringLiterals && overlaps(index.strings)) return STRING_WITH_PRINTF_EXCLUDES
        return EMPTY_TOKENIZER
    }
    private object EMPTY_TOKENIZER : Tokenizer<PsiElement>() {
        override fun tokenize(element: PsiElement, consumer: TokenConsumer) {}
    }
    private object IDENTIFIER_TOKENIZER : Tokenizer<PsiElement>() {
        private val splitter = PlainTextSplitter.getInstance()
        override fun tokenize(element: PsiElement, consumer: TokenConsumer) {
            val text = element.text
            if (text.isNullOrEmpty()) return
            consumer.consumeToken(element, text, false, 0, TextRange(0, text.length), splitter)
        }
    }
    private object COMMENT_TEXT_TOKENIZER : Tokenizer<PsiElement>() {
        private val splitter = PlainTextSplitter.getInstance()
        override fun tokenize(element: PsiElement, consumer: TokenConsumer) {
            val text = element.text
            if (text.isNullOrEmpty()) return
            consumer.consumeToken(element, text, false, 0, TextRange(0, text.length), splitter)
        }
    }
    private object STRING_WITH_PRINTF_EXCLUDES : Tokenizer<PsiElement>() {
        private val splitter = PlainTextSplitter.getInstance()
        // Regex for printf-style specifiers: %[flags][width][.precision][length]type
        // This is intentionally permissive to skip common cases like %s, %d, %-12s, %08x, %.2f, %%
        private val SPEC = Regex("%(?:[-+ #0]*(?:\\d+)?(?:\\.\\d+)?[a-zA-Z%])")
        override fun tokenize(element: PsiElement, consumer: TokenConsumer) {
            // Check project settings whether literals should be spell-checked
            val settings = LyngFormatterSettings.getInstance(element.project)
            if (!settings.spellCheckStringLiterals) return
            val text = element.text
            if (text.isEmpty()) return
            // Try to strip surrounding quotes (simple lexer token for Lyng strings)
            var startOffsetInElement = 0
            var endOffsetInElement = text.length
            if (text.length >= 2 && (text.first() == '"' && text.last() == '"' || text.first() == '\'' && text.last() == '\'')) {
                startOffsetInElement = 1
                endOffsetInElement = text.length - 1
            }
            if (endOffsetInElement <= startOffsetInElement) return
            val content = text.substring(startOffsetInElement, endOffsetInElement)
            var last = 0
            for (m in SPEC.findAll(content)) {
                val ms = m.range.first
                val me = m.range.last + 1
                if (ms > last) {
                    val range = TextRange(startOffsetInElement + last, startOffsetInElement + ms)
                    consumer.consumeToken(element, text, false, 0, range, splitter)
                }
                last = me
            }
            if (last < content.length) {
                val range = TextRange(startOffsetInElement + last, startOffsetInElement + content.length)
                consumer.consumeToken(element, text, false, 0, range, splitter)
            }
        }
    }
 }
@@ -0,0 +1,44 @@
 /*
 * Ensure external/bundled docs are registered in BuiltinDocRegistry
 * so completion/quickdoc can resolve things like lyng.io.fs.Path.
 */
 package net.sergeych.lyng.idea.util
 import com.intellij.openapi.diagnostic.Logger
 import net.sergeych.lyng.idea.docs.FsDocsFallback
 object DocsBootstrap {
    private val log = Logger.getInstance(DocsBootstrap::class.java)
    @Volatile private var ensured = false
    fun ensure() {
        if (ensured) return
        synchronized(this) {
            if (ensured) return
            val loaded = tryLoadExternal() || trySeedFallback()
            if (loaded) ensured = true else ensured = true // mark done to avoid repeated attempts
        }
    }
    private fun tryLoadExternal(): Boolean = try {
        val cls = Class.forName("net.sergeych.lyngio.docs.FsBuiltinDocs")
        val m = cls.getMethod("ensure")
        m.invoke(null)
        log.info("[LYNG_DEBUG] DocsBootstrap: external docs loaded: net.sergeych.lyngio.docs.FsBuiltinDocs.ensure() OK")
        true
    } catch (_: Throwable) {
        false
    }
    private fun trySeedFallback(): Boolean = try {
        val seeded = FsDocsFallback.ensureOnce()
        if (seeded) {
            log.info("[LYNG_DEBUG] DocsBootstrap: external docs not found; seeded plugin fallback for lyng.io.fs")
        } else {
            log.info("[LYNG_DEBUG] DocsBootstrap: external docs not found; no fallback seeded")
        }
        seeded
    } catch (_: Throwable) {
        false
    }
 }
@@ -0,0 +1,62 @@
 /*
 * 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.util
 import com.intellij.application.options.CodeStyle
 import com.intellij.openapi.editor.Document
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.util.TextRange
 import net.sergeych.lyng.format.LyngFormatConfig
 import net.sergeych.lyng.format.LyngFormatter
 object FormattingUtils {
    fun computeDesiredIndent(project: Project, doc: Document, line: Int): String {
        val options = CodeStyle.getIndentOptions(project, doc)
        val start = 0
        val end = doc.getLineEndOffset(line)
        val snippet = doc.getText(TextRange(start, end))
        val lineText = if (line < doc.lineCount) {
            val ls = doc.getLineStartOffset(line)
            val le = doc.getLineEndOffset(line)
            doc.getText(TextRange(ls, le))
        } else ""
        val isBlankLine = lineText.trim().isEmpty()
        val snippetForCalc = if (isBlankLine) snippet + "x" else snippet
        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 formatted = LyngFormatter.reindent(snippetForCalc, cfg)
        val lastNl = formatted.lastIndexOf('\n')
        val lastLine = if (lastNl >= 0) formatted.substring(lastNl + 1) else formatted
        val wsLen = lastLine.indexOfFirst { it != ' ' && it != '\t' }.let { if (it < 0) lastLine.length else it }
        return lastLine.substring(0, wsLen)
    }
    fun findFirstNonWs(doc: Document, start: Int, end: Int): Int {
        var i = start
        val text = doc.charsSequence
        while (i < end) {
            val ch = text[i]
            if (ch != ' ' && ch != '\t') break
            i++
        }
        return i
    }
 }
@@ -0,0 +1,37 @@
 /*
 * 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.util
 import net.sergeych.lyng.ModuleScope
 import net.sergeych.lyng.Pos
 import net.sergeych.lyng.Scope
 import net.sergeych.lyng.Script
 import net.sergeych.lyng.pacman.ImportProvider
 /**
 * Import provider for IDE background features that never throws on missing modules.
 * It allows all imports and returns an empty [ModuleScope] for unknown packages so
 * the compiler can still build MiniAst for Quick Docs / highlighting.
 */
 class IdeLenientImportProvider private constructor(root: Scope) : ImportProvider(root) {
    override suspend fun createModuleScope(pos: Pos, packageName: String): ModuleScope = ModuleScope(this, pos, packageName)
    companion object {
        /** Create a provider based on the default manager's root scope. */
        fun create(): IdeLenientImportProvider = IdeLenientImportProvider(Script.defaultImportManager.rootScope)
    }
 }
@@ -0,0 +1,84 @@
 /*
 * 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.util
 import com.intellij.openapi.util.Key
 import com.intellij.psi.PsiFile
 import kotlinx.coroutines.runBlocking
 import net.sergeych.lyng.Compiler
 import net.sergeych.lyng.Source
 import net.sergeych.lyng.binding.Binder
 import net.sergeych.lyng.binding.BindingSnapshot
 import net.sergeych.lyng.miniast.MiniAstBuilder
 import net.sergeych.lyng.miniast.MiniScript
 object LyngAstManager {
    private val MINI_KEY = Key.create<MiniScript>("lyng.mini.cache")
    private val BINDING_KEY = Key.create<BindingSnapshot>("lyng.binding.cache")
    private val STAMP_KEY = Key.create<Long>("lyng.mini.cache.stamp")
    fun getMiniAst(file: PsiFile): MiniScript? {
        val doc = file.viewProvider.document ?: return null
        val stamp = doc.modificationStamp
        val prevStamp = file.getUserData(STAMP_KEY)
        val cached = file.getUserData(MINI_KEY)
        if (cached != null && prevStamp != null && prevStamp == stamp) return cached
        val text = doc.text
        val sink = MiniAstBuilder()
        val built = try {
            val provider = IdeLenientImportProvider.create()
            val src = Source(file.name, text)
            runBlocking { Compiler.compileWithMini(src, provider, sink) }
            sink.build()
        } catch (_: Throwable) {
            sink.build()
        }
        if (built != null) {
            file.putUserData(MINI_KEY, built)
            file.putUserData(STAMP_KEY, stamp)
            // Invalidate binding too
            file.putUserData(BINDING_KEY, null)
        }
        return built
    }
    fun getBinding(file: PsiFile): BindingSnapshot? {
        val doc = file.viewProvider.document ?: return null
        val stamp = doc.modificationStamp
        val prevStamp = file.getUserData(STAMP_KEY)
        val cached = file.getUserData(BINDING_KEY)
        if (cached != null && prevStamp != null && prevStamp == stamp) return cached
        val mini = getMiniAst(file) ?: return null
        val text = doc.text
        val binding = try {
            Binder.bind(text, mini)
        } catch (_: Throwable) {
            null
        }
        if (binding != null) {
            file.putUserData(BINDING_KEY, binding)
            // stamp is already set by getMiniAst
        }
        return binding
    }
 }
@@ -0,0 +1,60 @@
 /*
 * Shared tiny, PSI-free text helpers for Lyng editor features (Quick Doc, Completion).
 */
 package net.sergeych.lyng.idea.util
 import com.intellij.openapi.util.TextRange
 object TextCtx {
    fun prefixAt(text: String, offset: Int): String {
        val off = offset.coerceIn(0, text.length)
        var i = (off - 1).coerceAtLeast(0)
        while (i >= 0 && isIdentChar(text[i])) i--
        val start = i + 1
        return if (start in 0..text.length && start <= off) text.substring(start, off) else ""
    }
    fun wordRangeAt(text: String, offset: Int): TextRange? {
        if (text.isEmpty()) return null
        val off = offset.coerceIn(0, text.length)
        var s = off
        var e = off
        while (s > 0 && isIdentChar(text[s - 1])) s--
        while (e < text.length && isIdentChar(text[e])) e++
        return if (s < e) TextRange(s, e) else null
    }
    fun findDotLeft(text: String, offset: Int): Int? {
        var i = (offset - 1).coerceAtLeast(0)
        while (i >= 0 && text[i].isWhitespace()) i--
        return if (i >= 0 && text[i] == '.') i else null
    }
    fun previousWordBefore(text: String, offset: Int): String? {
        var i = prevNonWs(text, (offset - 1).coerceAtLeast(0))
        // Skip trailing identifier at caret if inside word
        while (i >= 0 && isIdentChar(text[i])) i--
        i = prevNonWs(text, i)
        if (i < 0) return null
        val end = i + 1
        while (i >= 0 && isIdentChar(text[i])) i--
        val start = i + 1
        return if (start < end) text.substring(start, end) else null
    }
    fun hasDotBetween(text: String, start: Int, end: Int): Boolean {
        if (start >= end) return false
        val s = start.coerceAtLeast(0)
        val e = end.coerceAtMost(text.length)
        for (i in s until e) if (text[i] == '.') return true
        return false
    }
    fun prevNonWs(text: String, start: Int): Int {
        var i = start.coerceAtMost(text.length - 1)
        while (i >= 0 && text[i].isWhitespace()) i--
        return i
    }
    fun isIdentChar(c: Char): Boolean = c == '_' || c.isLetterOrDigit()
 }
@@ -0,0 +1,29 @@
 <!--
  ~ 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 (bundled Natural Languages) optional descriptor for Lyng. Loaded when plugin ID com.intellij.grazie is present.
 -->
 <idea-plugin>
    <extensions defaultExtensionNs="com.intellij">
        <grazie.grammar.strategy language="Lyng"
                                  implementationClass="net.sergeych.lyng.idea.grazie.LyngGrazieStrategy"/>
        <!-- Provide text extraction for Lyng PSI so Grazie (bundled Natural Languages) can check content -->
        <grazie.textExtractor language="Lyng"
                              implementationClass="net.sergeych.lyng.idea.grazie.LyngTextExtractor"/>
    </extensions>
 </idea-plugin>
@@ -0,0 +1,30 @@
 <!--
  ~ 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 Lite/Pro optional descriptor for Lyng. Loaded when plugin ID tanvd.grazi is present.
  It delegates to the same strategy class as the bundled Natural Languages.
 -->
 <idea-plugin>
    <extensions defaultExtensionNs="com.intellij">
        <grazie.grammar.strategy language="Lyng"
                                  implementationClass="net.sergeych.lyng.idea.grazie.LyngGrazieStrategy"/>
        <!-- Provide text extraction for Lyng PSI so Grazie can actually check content -->
        <grazie.textExtractor language="Lyng"
                              implementationClass="net.sergeych.lyng.idea.grazie.LyngTextExtractor"/>
    </extensions>
 </idea-plugin>
Author	SHA1	Message	Date
sergeych	1d9befe101	fixed fromatter, plugin, site, libs for new language features	2026-01-04 01:25:16 +01:00
sergeych	abb262d9cf	Improve property accessor indentation handling, add tests, and enhance nested control flow formatting. Fix enum and property keyword highlighting.	2026-01-04 00:09:47 +01:00
sergeych	eca451b5a3	Implement restricted setter visibility (private set / protected set) for class fields and properties.	2026-01-03 23:38:53 +01:00
sergeych	54af50d6d6	Implement support for late-initialized val fields in classes. Added ObjUnset, UnsetException, compile-time initialization checks, and write-once enforcement for val fields.	2026-01-03 22:05:29 +01:00
sergeych	ce0fc3650d	"cache" bug found and fixed, causing some improvemts in lambda processing.	2026-01-03 21:06:09 +01:00
sergeych	ce021e85f4	compiler bug with that can cause compilation infinite loop; object is always comparable to self instance or null	2026-01-03 21:05:56 +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