better lang page (ribbon & tg channel)

CHANGELOG.md

@@ -2,6 +2,23 @@
 
 ### Unreleased
 
+- Language: Named arguments and named splats
+  - New call-site syntax for named arguments using colon: `name: value`.
+    - Positional arguments must come before named; positionals after a named argument inside parentheses are rejected.
+    - Trailing-lambda interaction: if the last parameter is already assigned by name (or via a named splat), a trailing `{ ... }` block is illegal.
+  - Named splats: `...` can now expand a Map into named arguments.
+    - Only string keys are allowed; non-string keys raise a clear error.
+    - Duplicate assignment across named args and named splats is an error.
+    - Ellipsis (variadic) parameters remain positional-only and cannot be named.
+  - Rationale: `=` is assignment and an expression in Lyng; `:` at call sites avoids ambiguity. Declarations keep `name: Type`; call-site casts continue to use `as` / `as?`.
+  - Documentation updated: proposals and declaring-arguments sections now cover named args/splats and error cases.
+  - Tests added covering success cases and errors for named args/splats and trailing-lambda interactions.
+
+- Tooling: Highlighters and TextMate bundle updated for named args
+  - Website/editor highlighter (lyngweb + site) works with `name: value` and `...Map("k" => v)`; added JS tests covering punctuation/operator spans for `:` and `...`.
+  - TextMate grammar updated to recognize named call arguments: `name: value` after `(` or `,` with `name` highlighted as `variable.parameter.named.lyng` and `:` as punctuation; excludes `::`.
+  - TextMate bundle version bumped to 0.0.3; README updated with details and guidance.
+
 - Multiple Inheritance (MI) completed and enabled by default:
   - Active C3 Method Resolution Order (MRO) for deterministic, monotonic lookup across complex hierarchies and diamonds.
   - Qualified dispatch:

docs/declaring_arguments.md

@@ -5,7 +5,7 @@ lambdas and class declarations.
 
 ## Regular
 
-## default values
+## Default values
 
 Default parameters should not be mixed with mandatory ones:
 
@@ -96,5 +96,52 @@ There could be any number of splats at any positions. You can splat any other [I
     >>> [start,1,2,3,end]
     >>> void
 
+## Named arguments in calls
+
+Lyng supports named arguments at call sites using colon syntax `name: value`:
+
+```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"))
+```
+
+Rules:
+
+- 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.
+
+## Named splats (map splats)
+
+Splat (`...`) of a Map provides named arguments to the call. Only string keys are allowed:
+
+```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)
+```
+
+Constraints:
+
+- Map splat keys must be strings; otherwise, a clean error is thrown.
+- Named splats cannot duplicate parameters already assigned (by positional or named arguments).
+- Named splats must follow all positional arguments and positional splats.
+- Ellipsis parameters (variadic) remain positional-only and cannot be assigned by name.
+
+## Trailing-lambda rule interaction
+
+If a call is immediately followed by a block `{ ... }`, it is treated as an extra last argument and bound to the last parameter. However, if the last parameter is already assigned by a named argument or a named splat, using a trailing block is an error:
+
+```lyng
+    fun f(x, onDone) { onDone(x) }
+    f(x: 1) { 42 }   // ERROR
+    f(1) { 42 }      // OK
+```
+    
 
 [tutorial]: tutorial.md

docs/proposals/map_literal.md

@@ -0,0 +1,82 @@
+Note for AI. please ignore this file until this remark is removed.
+
+# Map literals proposal
+
+Note to the AI: please ignore this file until this note is removed.
+
+Implement javascript-like literals for maps. It uses the similar syntax already adopted for named arguments in function calls so it should be organic and familiar, as the purpose is similar.
+
+String literal keys
+
+```lyng
+    val m = { a: "foo", b: "bar" }
+    assertEqual(m.a, "foo")
+    assertEqual(m.b, "bar")
+```
+
+The map literal is a map with keys that are string literals only. This is important. In a relatively rare case when keys are calculated, or extravagant but still possible case when keys are of different types, literal could be combined with "=>":
+
+```lyng
+    val k1 = "bar"
+    val m = { "foo": 123 } + k1 => "buzz"
+    // this is same as Map("foo" => 123) + Map("bar" => k2) but can be optimized by compiler
+    assertEqual(m["foo"], 123)
+    assertEqual(m["bar"], "buzz")
+```
+
+The lambda syntax is different, it can start with the `map_lteral_start` above, it should produce compile time error, so we can add map literals of this sort.
+
+Also, we will allow splats in map literals:
+
+```
+    val m = { foo: "bar", ...{bar: "buzz"} }
+    assertEquals("bar",m["foo"])
+    assertEquals("buzz", m["bar"])
+```
+
+When the literal argument and splats are used together, they must be evaluated left-to-right with allowed overwriting
+between named elements and splats, allowing any combination and multiple splats:
+
+```
+    val m = { foo: "bar", ...{bar: "buzz"}, ...{foo: "foobar"}, bar: "bar" }
+    assertEquals("foobar",m["foo"])
+    assertEquals("bar", m["bar"])
+```
+
+Still we disallow duplicating _string literals_:
+
+```
+    // this is an compile-time exception:
+    { foo: 1, bar: 2, foo: 3 }
+```
+
+Special syntax allows to insert key-value pair from the variable which name should be the key, and content is value:
+
+```
+    val foo = "bar"
+    val bar = "buzz"
+    assertEquals( {foo: "bar", bar: "buzz"}, { *foo, *bar } )
+```
+
+Question to the AI: maybe better syntax than asterisk for that case?
+
+So, summarizing, overwriting/duplication rules are:
+
+- string literals can't duplicate 
+- splats add or update content, effectively overwrite preceding content,
+- string literals overwrite content received from preceding splats (as no duplication string literal keys allowed)
+- the priority and order is left-to-right, rightmost wins.
+- var inclusion is treated as form of the literal
+
+This approach resolves the ambiguity from lambda syntax, as
+
+```ebnf
+    ws = zero or more whitespace characters including newline
+    map_literal start = "{", ws, (s1 | s2 | s3)
+    s1 = string_literal, ws, ":", ws, expression
+    s2 = "...", string_literal
+    s3 = "*", string_literal
+```
+
+as we can see, `map_literal_start` is not a valid lambda beginning so it is not create ambiguity.
+

docs/proposals/named_args.md

@@ -0,0 +1,67 @@
+# Named arguments proposal
+
+Extend function/method calls to allow setting arguments by name using colon syntax at call sites. This is especially convenient with many parameters and default values.
+
+Examples:
+
+```lyng
+    fun test(a="foo", b="bar", c="bazz") { [a, b, c] }
+
+    assertEquals(test(b: "b"), ["foo", "b", "bazz"])
+    assertEquals(test("a", c: "c"), ["a", "bar", "c"])
+```
+
+Rules:
+
+- Named arguments are optional. If named arguments are present, their order is not important.
+- Named arguments must follow positional arguments; positional arguments cannot follow named ones (the only exception is the syntactic trailing block outside parentheses, see below).
+- A named argument cannot reassign a parameter already set positionally.
+- If the last parameter is already assigned by a named argument (or named splat), the trailing-lambda rule must NOT apply: a following `{ ... }` after the call is an error.
+
+Rationale for using `:` instead of `=` in calls: in Lyng, assignment `=` is an expression; using `:` avoids ambiguity and keeps declarations (`name: Type`) distinct from call sites, where casting uses `as` / `as?`.
+
+Migration note: earlier drafts/examples used `name = value`. The final syntax is `name: value` at call sites.
+
+## Extended call argument splats: named splats
+
+With named arguments, splats (`...`) are extended to support maps as named splats. When a splat evaluates to a Map, its entries provide name→value assignments:
+
+```lyng
+    fun test(a="a", b="b", c="c", d="d") { [a, b, c, d] }
+
+    assertEquals(test("A?", ...Map("d" => "D!", "b" => "B!")), ["A?", "B!", "c", "D!"])
+```
+
+Constraints for named splats:
+
+- Only string keys are allowed in map splats; otherwise, a clean error is thrown.
+- Named splats cannot reassign parameters already set (positionally or by earlier named arguments/splats).
+- Named splats follow the same ordering as named arguments: they must appear after all positional arguments and positional splats.
+
+## Trailing-lambda interaction
+
+Lyng supports a syntactic trailing block after a call: `f(args) { ... }`. With named args/splats, if the last parameter is already assigned by name, the trailing block must not apply and the call is an error:
+
+```lyng
+    fun f(x, onDone) { onDone(x) }
+    f(x: 1) { 42 }    // ERROR: last parameter already assigned by name
+    f(1) { 42 }       // OK
+```
+
+## Errors (non-exhaustive)
+
+- Positional argument after any named argument inside parentheses: error.
+- Positional splat after any named argument: error.
+- Duplicate named assignment (directly or via map splats): error.
+- Unknown parameter name in a named argument/splat: error.
+- Map splat with non-string keys: error.
+- Attempt to target the ellipsis parameter by name: error.
+
+## Notes
+
+- Declarations continue to use `:` for types, while call sites use `:` for named arguments and `as` / `as?` for type casts/checks.
+
+
+
+
+

docs/samples/sum.lyng

@@ -1,7 +1,7 @@
+#!/bin/env lyng
 /*
     Calculate the limit of Sum( f(n) )
     until it reaches asymptotic limit 0.00001% change
-
     return null or found limit
 */
 fun findSumLimit(f) {

editors/lyng-textmate/README.md

@@ -25,6 +25,7 @@ Files
   - Operators including ranges (`..`, `..<`, `...`), null-safe (`?.`, `?[`, `?(`, `?{`, `?:`, `??`), arrows (`->`, `=>`, `::`), match operators (`=~`, `!~`), bitwise, arithmetic, etc.
   - Shuttle operator `<=>`
   - Division operator `/` (note: Lyng has no regex literal syntax; `/` is always division)
+  - Named arguments at call sites `name: value` (the `name` part is highlighted as `variable.parameter.named.lyng` and the `:` as punctuation). The rule is anchored to `(` or `,` and excludes `::` to avoid conflicts.
 
 Install in IntelliJ IDEA (and other JetBrains IDEs)
 ---------------------------------------------------
@@ -56,6 +57,7 @@ Notes and limitations
 ---------------------
 - Type highlighting is heuristic (Capitalized identifiers). The IntelliJ plugin will use language semantics and avoid false positives.
 - If your language adds or changes tokens, please update patterns in `lyng.tmLanguage.json`. The Kotlin sources in `lynglib/src/commonMain/kotlin/net/sergeych/lyng/highlight/` are a good reference for token kinds.
+- Labels `name:` at statement level remain supported and are kept distinct from named call arguments by context. The grammar prefers named-argument matching when a `name:` appears right after `(` or `,`.
 
 Lyng specifics
 --------------

editors/lyng-textmate/package.json

@@ -2,7 +2,7 @@
   "name": "lyng-textmate",
   "displayName": "Lyng",
   "description": "TextMate grammar for the Lyng language (for JetBrains IDEs via TextMate Bundles and VS Code).",
-  "version": "0.0.2",
+  "version": "0.0.3",
   "publisher": "lyng",
   "license": "Apache-2.0",
   "engines": { "vscode": "^1.0.0" },

editors/lyng-textmate/syntaxes/lyng.tmLanguage.json

@@ -13,6 +13,7 @@
     { "include": "#keywords" },
     { "include": "#constants" },
     { "include": "#types" },
+    { "include": "#namedArgs" },
     { "include": "#annotations" },
     { "include": "#labels" },
     { "include": "#directives" },
@@ -41,6 +42,18 @@
       ]
     },
     "annotations": { "patterns": [ { "name": "entity.name.label.at.lyng", "match": "@[\\p{L}_][\\p{L}\\p{N}_]*:" }, { "name": "storage.modifier.annotation.lyng", "match": "@[\\p{L}_][\\p{L}\\p{N}_]*" } ] },
+    "namedArgs": {
+      "patterns": [
+        {
+          "name": "meta.argument.named.lyng",
+          "match": "(?:(?<=\\()|(?<=,))\\s*([\\p{L}_][\\p{L}\\p{N}_]*)\\s*(:)(?!:)",
+          "captures": {
+            "1": { "name": "variable.parameter.named.lyng" },
+            "2": { "name": "punctuation.separator.colon.lyng" }
+          }
+        }
+      ]
+    },
     "labels": { "patterns": [ { "name": "entity.name.label.lyng", "match": "[\\p{L}_][\\p{L}\\p{N}_]*:" } ] },
     "directives": { "patterns": [ { "name": "meta.directive.lyng", "match": "^\\s*#[_A-Za-z][_A-Za-z0-9]*" } ] },
     "declarations": { "patterns": [ { "name": "meta.function.declaration.lyng", "match": "\\b(?:fun|fn)\\s+([\\p{L}_][\\p{L}\\p{N}_]*)", "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" } } } ] },

lyng/build.gradle.kts

@@ -31,6 +31,15 @@ repositories {
 }
 
 kotlin {
+    // Suppress Beta warning for expect/actual classes across all targets in this module
+    targets.configureEach {
+        compilations.configureEach {
+            compilerOptions.configure {
+                freeCompilerArgs.add("-Xexpect-actual-classes")
+            }
+        }
+    }
+
     jvm {
         binaries {
             executable {

lynglib/build.gradle.kts

@@ -21,7 +21,7 @@ import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 group = "net.sergeych"
-version = "1.0.0-SNAPSHOT"
+version = "1.0.1-SNAPSHOT"
 
 // Removed legacy buildscript classpath declarations; plugins are applied via the plugins DSL below
 
@@ -72,6 +72,15 @@ kotlin {
         nodejs()
     }
 
+    // Suppress Beta warning for expect/actual classes across all targets
+    targets.configureEach {
+        compilations.configureEach {
+            compilerOptions.configure {
+                freeCompilerArgs.add("-Xexpect-actual-classes")
+            }
+        }
+    }
+
     sourceSets {
         all {
             languageSettings.optIn("kotlinx.coroutines.ExperimentalCoroutinesApi")
@@ -141,6 +150,40 @@ tasks.withType<org.gradle.api.tasks.testing.Test> {
         showStandardStreams = true
     }
     maxParallelForks = 1
+
+    // Benchmarks toggle: disabled by default, enable when optimizing locally.
+    // Enable via any of the following:
+    //  - Gradle property:  ./gradlew :lynglib:jvmTest -Pbenchmarks=true
+    //  - JVM system prop:  ./gradlew :lynglib:jvmTest -Dbenchmarks=true
+    //  - Environment var:  BENCHMARKS=true ./gradlew :lynglib:jvmTest
+    val benchmarksEnabled: Boolean = run {
+        val p = (project.findProperty("benchmarks") as String?)?.toBooleanStrictOrNull()
+        val s = System.getProperty("benchmarks")?.lowercase()?.let { it == "true" || it == "1" || it == "yes" }
+        val e = System.getenv("BENCHMARKS")?.lowercase()?.let { it == "true" || it == "1" || it == "yes" }
+        p ?: s ?: e ?: false
+    }
+
+    // Make the flag visible inside tests if they want to branch on it
+    systemProperty("LYNG_BENCHMARKS", benchmarksEnabled.toString())
+
+    if (!benchmarksEnabled) {
+        // Exclude all JVM tests whose class name ends with or contains BenchmarkTest
+        // This keeps CI fast and avoids noisy timing logs by default.
+        filter {
+            excludeTestsMatching("*BenchmarkTest")
+            // Also guard against alternative naming
+            excludeTestsMatching("*Bench*Test")
+            // Exclude A/B performance tests unless explicitly enabled
+            excludeTestsMatching("*ABTest")
+            // Exclude stress/perf soak tests
+            excludeTestsMatching("*Stress*Test")
+            // Exclude allocation profiling tests by default
+            excludeTestsMatching("*AllocationProfileTest")
+        }
+        logger.lifecycle("[tests] Benchmarks are DISABLED. To enable: -Pbenchmarks=true or -Dbenchmarks=true or set BENCHMARKS=true")
+    } else {
+        logger.lifecycle("[tests] Benchmarks are ENABLED: *BenchmarkTest will run")
+    }
 }
 
 //mavenPublishing {

lynglib/src/commonMain/kotlin/net/sergeych/lyng/ArgsDeclaration.kt

@@ -57,72 +57,137 @@ data class ArgsDeclaration(val params: List<Item>, val endTokenType: Token.Type)
                 recordType = ObjRecord.Type.Argument)
         }
 
-        // will be used with last lambda arg fix
+        // Prepare positional args and parameter count, handle tail-block binding
         val callArgs: List<Obj>
         val paramsSize: Int
-
         if (arguments.tailBlockMode) {
+            // If last parameter is already assigned by a named argument, it's an error
+            val lastParam = params.last()
+            if (arguments.named.containsKey(lastParam.name))
+                scope.raiseIllegalArgument("trailing block cannot be used when the last parameter is already assigned by a named argument")
             paramsSize = params.size - 1
-            assign(params.last(), arguments.list.last())
+            assign(lastParam, arguments.list.last())
             callArgs = arguments.list.dropLast(1)
         } else {
             paramsSize = params.size
             callArgs = arguments.list
         }
 
-        suspend fun processHead(index: Int): Int {
+        // Compute which parameter indexes are inevitably covered by positional arguments
+        // based on the number of supplied positionals, defaults and ellipsis placement.
+        val coveredByPositional = BooleanArray(paramsSize)
+        run {
+            // Count required (non-default, non-ellipsis) params in head and in tail
+            var headRequired = 0
+            var tailRequired = 0
+            val ellipsisIdx = params.subList(0, paramsSize).indexOfFirst { it.isEllipsis }
+            if (ellipsisIdx >= 0) {
+                for (i in 0 until ellipsisIdx) if (!params[i].isEllipsis && params[i].defaultValue == null) headRequired++
+                for (i in paramsSize - 1 downTo ellipsisIdx + 1) if (params[i].defaultValue == null) tailRequired++
+            } else {
+                for (i in 0 until paramsSize) if (params[i].defaultValue == null) headRequired++
+            }
+            val P = callArgs.size
+            if (ellipsisIdx < 0) {
+                // No ellipsis: all positionals go to head until exhausted
+                val k = minOf(P, paramsSize)
+                for (i in 0 until k) coveredByPositional[i] = true
+            } else {
+                // With ellipsis: head takes min(P, headRequired) first
+                val headTake = minOf(P, headRequired)
+                for (i in 0 until headTake) coveredByPositional[i] = true
+                val remaining = P - headTake
+                // tail takes min(remaining, tailRequired) from the end
+                val tailTake = minOf(remaining, tailRequired)
+                var j = paramsSize - 1
+                var taken = 0
+                while (j > ellipsisIdx && taken < tailTake) {
+                    coveredByPositional[j] = true
+                    j--
+                    taken++
+                }
+            }
+        }
+
+        // Prepare arrays for named assignments
+        val assignedByName = BooleanArray(paramsSize)
+        val namedValues = arrayOfNulls<Obj>(paramsSize)
+        if (arguments.named.isNotEmpty()) {
+            for ((k, v) in arguments.named) {
+                val idx = params.subList(0, paramsSize).indexOfFirst { it.name == k }
+                if (idx < 0) scope.raiseIllegalArgument("unknown parameter '$k'")
+                if (params[idx].isEllipsis) scope.raiseIllegalArgument("ellipsis (variadic) parameter cannot be assigned by name: '$k'")
+                if (coveredByPositional[idx]) scope.raiseIllegalArgument("argument '$k' is already set by positional argument")
+                if (assignedByName[idx]) scope.raiseIllegalArgument("argument '$k' is already set")
+                assignedByName[idx] = true
+                namedValues[idx] = v
+            }
+        }
+
+        // Helper: assign head part, consuming from headPos; stop at ellipsis
+        suspend fun processHead(index: Int, headPos: Int): Pair<Int, Int> {
             var i = index
-            while (i != paramsSize) {
+            var hp = headPos
+            while (i < paramsSize) {
                 val a = params[i]
                 if (a.isEllipsis) break
-                val value = when {
-                    i < callArgs.size -> callArgs[i]
-                    a.defaultValue != null -> a.defaultValue.execute(scope)
-                    else -> {
-//                        println("callArgs: ${callArgs.joinToString()}")
-//                        println("tailBlockMode: ${arguments.tailBlockMode}")
-                        scope.raiseIllegalArgument("too few arguments for the call")
-                    }
-                }
+                if (assignedByName[i]) {
+                    assign(a, namedValues[i]!!)
+                } else {
+                    val value = if (hp < callArgs.size) callArgs[hp++]
+                    else a.defaultValue?.execute(scope)
+                        ?: scope.raiseIllegalArgument("too few arguments for the call")
                     assign(a, value)
+                }
                 i++
             }
-            return i
+            return i to hp
         }
 
-        suspend fun processTail(index: Int): Int {
+        // Helper: assign tail part from the end, consuming from tailPos; stop before ellipsis index
+        // Do not consume elements below headPosBound to avoid overlap with head consumption
+        suspend fun processTail(startExclusive: Int, tailStart: Int, headPosBound: Int): Int {
             var i = paramsSize - 1
-            var j = callArgs.size - 1
-            while (i > index) {
+            var tp = tailStart
+            while (i > startExclusive) {
                 val a = params[i]
                 if (a.isEllipsis) break
-                val value = when {
-                    j >= index -> {
-                        callArgs[j--]
-                    }
-
-                    a.defaultValue != null -> a.defaultValue.execute(scope)
-                    else -> scope.raiseIllegalArgument("too few arguments for the call")
-                }
+                if (i < assignedByName.size && assignedByName[i]) {
+                    assign(a, namedValues[i]!!)
+                } else {
+                    val value = if (tp >= headPosBound) callArgs[tp--]
+                    else a.defaultValue?.execute(scope)
+                        ?: scope.raiseIllegalArgument("too few arguments for the call")
                     assign(a, value)
+                }
                 i--
             }
-            return j
+            return tp
         }
 
-        fun processEllipsis(index: Int, toFromIndex: Int) {
+        fun processEllipsis(index: Int, headPos: Int, tailPos: Int) {
             val a = params[index]
-            val l = if (index > toFromIndex) ObjList()
-            else ObjList(callArgs.subList(index, toFromIndex + 1).toMutableList())
+            val from = headPos
+            val to = tailPos
+            val l = if (from > to) ObjList()
+            else ObjList(callArgs.subList(from, to + 1).toMutableList())
             assign(a, l)
         }
 
-        val leftIndex = processHead(0)
-        if (leftIndex < paramsSize) {
-            val end = processTail(leftIndex)
-            processEllipsis(leftIndex, end)
+        // Locate ellipsis index within considered parameters
+        val ellipsisIndex = params.subList(0, paramsSize).indexOfFirst { it.isEllipsis }
+
+        if (ellipsisIndex >= 0) {
+            // Assign head first to know how many positionals are consumed from the start
+            val (afterHead, headConsumedTo) = processHead(0, 0)
+            // Then assign tail consuming from the end down to headConsumedTo boundary
+            val tailConsumedFrom = processTail(ellipsisIndex, callArgs.size - 1, headConsumedTo)
+            // Assign ellipsis list from remaining positionals between headConsumedTo..tailConsumedFrom
+            processEllipsis(ellipsisIndex, headConsumedTo, tailConsumedFrom)
         } else {
-            if (leftIndex < callArgs.size)
+            // No ellipsis: assign head only; any leftover positionals → error
+            val (_, headConsumedTo) = processHead(0, 0)
+            if (headConsumedTo != callArgs.size)
                 scope.raiseIllegalArgument("too many arguments for the call")
         }
     }

lynglib/src/commonMain/kotlin/net/sergeych/lyng/Arguments.kt

@@ -17,24 +17,27 @@
 
 package net.sergeych.lyng
 
-import net.sergeych.lyng.obj.Obj
-import net.sergeych.lyng.obj.ObjIterable
-import net.sergeych.lyng.obj.ObjList
+import net.sergeych.lyng.obj.*
 
- data class ParsedArgument(val value: Statement, val pos: Pos, val isSplat: Boolean = false)
+data class ParsedArgument(
+     val value: Statement,
+     val pos: Pos,
+     val isSplat: Boolean = false,
+     val name: String? = null,
+ )
  
  suspend fun Collection<ParsedArgument>.toArguments(scope: Scope, tailBlockMode: Boolean): Arguments {
-     // Small-arity fast path (no splats) to reduce allocations
+     // Detect if we can use the fast path: no splats and no named args
      if (PerfFlags.ARG_BUILDER) {
          val limit = if (PerfFlags.ARG_SMALL_ARITY_12) 12 else 8
-         var hasSplat = false
+         var hasSplatOrNamed = false
          var count = 0
          for (pa in this) {
-             if (pa.isSplat) { hasSplat = true; break }
+             if (pa.isSplat || pa.name != null) { hasSplatOrNamed = true; break }
              count++
              if (count > limit) break
          }
-         if (!hasSplat && count == this.size) {
+         if (!hasSplatOrNamed && count == this.size) {
              val quick = when (count) {
                  0 -> Arguments.EMPTY
                  1 -> Arguments(listOf(this.elementAt(0).value.execute(scope)), tailBlockMode)
@@ -153,90 +156,86 @@ import net.sergeych.lyng.obj.ObjList
              if (quick != null) return quick
          }
      }
-     // Single-splat fast path: if there is exactly one splat argument that evaluates to ObjList,
-     // avoid builder and copies by returning its list directly.
-     if (PerfFlags.ARG_BUILDER) {
-         if (this.size == 1) {
-             val only = this.first()
-             if (only.isSplat) {
-                 val v = only.value.execute(scope)
-                 if (v is ObjList) {
-                     return Arguments(v.list, tailBlockMode)
-                 } else if (v.isInstanceOf(ObjIterable)) {
-                     // Convert iterable to list once and return directly
-                     val i = (v.invokeInstanceMethod(scope, "toList") as ObjList).list
-                     return Arguments(i, tailBlockMode)
-                 } else {
-                     scope.raiseClassCastError("expected list of objects for splat argument")
-                 }
-             }
-         }
-     }
 
-     // General path with builder or simple list fallback
-     if (PerfFlags.ARG_BUILDER) {
-         val b = ArgBuilderProvider.acquire()
-         try {
-             b.reset(this.size)
-             for (x in this) {
+     // General path: build positional list and named map, enforcing ordering rules
+     val positional: MutableList<Obj> = mutableListOf()
+     var named: MutableMap<String, Obj>? = null
+     var namedSeen = false
+     for ((idx, x) in this.withIndex()) {
+         if (x.name != null) {
+             // Named argument
+             if (named == null) named = linkedMapOf()
+             if (named.containsKey(x.name)) scope.raiseIllegalArgument("argument '${x.name}' is already set")
+             val v = x.value.execute(scope)
+             named[x.name] = v
+             namedSeen = true
+             continue
+         }
          val value = x.value.execute(scope)
          if (x.isSplat) {
              when {
+                 // IMPORTANT: handle ObjMap BEFORE generic Iterable to ensure map splats
+                 // are treated as named splats, not as positional iteration over entries
+                 value is ObjMap -> {
+                     if (named == null) named = linkedMapOf()
+                     for ((k, v) in value.map) {
+                         if (k !is ObjString) scope.raiseIllegalArgument("named splat expects a Map with string keys")
+                         val key = k.value
+                         if (named.containsKey(key)) scope.raiseIllegalArgument("argument '$key' is already set")
+                         named[key] = v
+                     }
+                     namedSeen = true
+                 }
                  value is ObjList -> {
-                             b.addAll(value.list)
+                     if (namedSeen) {
+                         // allow only if this is the very last positional which will be the trailing block; but
+                         // splat can never be a trailing block, so it's always illegal here
+                         scope.raiseIllegalArgument("positional splat cannot follow named arguments")
+                     }
+                     positional.addAll(value.list)
                  }
                  value.isInstanceOf(ObjIterable) -> {
+                     if (namedSeen) scope.raiseIllegalArgument("positional splat cannot follow named arguments")
                      val i = (value.invokeInstanceMethod(scope, "toList") as ObjList).list
-                             b.addAll(i)
+                     positional.addAll(i)
                  }
                  else -> scope.raiseClassCastError("expected list of objects for splat argument")
              }
          } else {
-                     b.add(value)
+             if (namedSeen) {
+                 // Allow exactly one positional after named only when it is the very last argument overall
+                 // and tailBlockMode is true (syntactic trailing block). Otherwise, forbid it.
+                 val isLast = idx == this.size - 1
+                 if (!(isLast && tailBlockMode))
+                     scope.raiseIllegalArgument("positional argument cannot follow named arguments")
+             }
+             positional.add(value)
          }
      }
-             return b.build(tailBlockMode)
-         } finally {
-             b.release()
-         }
-     } else {
-         val list: MutableList<Obj> = mutableListOf()
-         for (x in this) {
-             val value = x.value.execute(scope)
-             if (x.isSplat) {
-                 when {
-                     value is ObjList -> list.addAll(value.list)
-                     value.isInstanceOf(ObjIterable) -> {
-                         val i = (value.invokeInstanceMethod(scope, "toList") as ObjList).list
-                         list.addAll(i)
-                     }
-                     else -> scope.raiseClassCastError("expected list of objects for splat argument")
-                 }
-             } else {
-                 list.add(value)
-             }
-         }
-         return Arguments(list, tailBlockMode)
-     }
+     val namedFinal = named ?: emptyMap()
+     return Arguments(positional, tailBlockMode, namedFinal)
   }
  
- data class Arguments(val list: List<Obj>, val tailBlockMode: Boolean = false) : List<Obj> by list {
+ data class Arguments(
+     val list: List<Obj>,
+     val tailBlockMode: Boolean = false,
+     val named: Map<String, Obj> = emptyMap(),
+ ) : List<Obj> by list {
  
      constructor(vararg values: Obj) : this(values.toList())
  
      fun firstAndOnly(pos: Pos = Pos.UNKNOWN): Obj {
          if (list.size != 1) throw ScriptError(pos, "expected one argument, got ${list.size}")
-         val v = list.first()
          // Tiny micro-alloc win: avoid byValueCopy for immutable singletons
-         return when (v) {
-             net.sergeych.lyng.obj.ObjNull,
-             net.sergeych.lyng.obj.ObjTrue,
-            net.sergeych.lyng.obj.ObjFalse,
+         return when (val v = list.first()) {
+             ObjNull,
+             ObjTrue,
+             ObjFalse,
             // Immutable scalars: safe to return directly
-            is net.sergeych.lyng.obj.ObjInt,
-            is net.sergeych.lyng.obj.ObjReal,
-            is net.sergeych.lyng.obj.ObjChar,
-            is net.sergeych.lyng.obj.ObjString -> v
+            is ObjInt,
+            is ObjReal,
+            is ObjChar,
+            is ObjString -> v
              else -> v.byValueCopy()
          }
      }

lynglib/src/commonMain/kotlin/net/sergeych/lyng/Compiler.kt

@@ -35,8 +35,8 @@ class Compiler(
 
     // Stack of parameter-to-slot plans for current function being parsed (by declaration index)
     private val paramSlotPlanStack = mutableListOf<Map<String, Int>>()
-    private val currentParamSlotPlan: Map<String, Int>?
-        get() = paramSlotPlanStack.lastOrNull()
+//    private val currentParamSlotPlan: Map<String, Int>?
+//        get() = paramSlotPlanStack.lastOrNull()
 
     // Track identifiers known to be locals/parameters in the current function for fast local emission
     private val localNamesStack = mutableListOf<MutableSet<String>>()
@@ -50,7 +50,11 @@ class Compiler(
 
     private inline fun <T> withLocalNames(names: Set<String>, block: () -> T): T {
         localNamesStack.add(names.toMutableSet())
-        return try { block() } finally { localNamesStack.removeLast() }
+        return try {
+            block()
+        } finally {
+            localNamesStack.removeLast()
+        }
     }
 
     private fun declareLocalName(name: String) {
@@ -86,6 +90,7 @@ class Compiler(
                     if (t.startsWith("*")) t.removePrefix("*").trimStart() else line
                 }
             }
+
             else -> raw
         }
     }
@@ -158,6 +163,7 @@ class Compiler(
                             // A standalone newline not immediately following a comment resets doc buffer
                             if (!prevWasComment) clearPendingDoc() else prevWasComment = false
                         }
+
                         else -> {}
                     }
                     cc.next()
@@ -191,12 +197,15 @@ class Compiler(
                                             val start = Pos(pos.source, pos.line, col)
                                             val end = Pos(pos.source, pos.line, col + p.length)
                                             col += p.length + 1 // account for following '.' between segments
-                                            net.sergeych.lyng.miniast.MiniImport.Segment(p, net.sergeych.lyng.miniast.MiniRange(start, end))
+                                            MiniImport.Segment(
+                                                p,
+                                                MiniRange(start, end)
+                                            )
                                         }
                                         val lastEnd = segs.last().range.end
                                         miniSink?.onImport(
-                                            net.sergeych.lyng.miniast.MiniImport(
-                                                net.sergeych.lyng.miniast.MiniRange(pos, lastEnd),
+                                            MiniImport(
+                                                MiniRange(pos, lastEnd),
                                                 segs
                                             )
                                         )
@@ -241,7 +250,10 @@ class Compiler(
             Script(start, statements)
         }.also {
             // Best-effort script end notification (use current position)
-            miniSink?.onScriptEnd(cc.currentPos(), net.sergeych.lyng.miniast.MiniScript(MiniRange(start, cc.currentPos())))
+            miniSink?.onScriptEnd(
+                cc.currentPos(),
+                MiniScript(MiniRange(start, cc.currentPos()))
+            )
         }
     }
 
@@ -327,7 +339,6 @@ class Compiler(
         var lvalue: ObjRef? = parseExpressionLevel(level + 1) ?: return null
 
         while (true) {
-
             val opToken = cc.next()
             val op = byLevel[level][opToken.type]
             if (op == null) {
@@ -552,11 +563,14 @@ class Compiler(
 
                 Token.Type.LBRACE, Token.Type.NULL_COALESCE_BLOCKINVOKE -> {
                     operand = operand?.let { left ->
-                        cc.previous()
+                        // Trailing block-argument function call: the leading '{' is already consumed,
+                        // and the lambda must be parsed as a single argument BEFORE any following
+                        // selectors like ".foo" are considered. Do NOT rewind here, otherwise
+                        // the expression parser may capture ".foo" as part of the lambda expression.
                         parseFunctionCall(
                             left,
                             blockArgument = true,
-                            t.type == Token.Type.NULL_COALESCE_BLOCKINVOKE
+                            isOptional = t.type == Token.Type.NULL_COALESCE_BLOCKINVOKE
                         )
                     } ?: parseLambdaExpression()
                 }
@@ -778,7 +792,11 @@ class Compiler(
         val typeStart = cc.currentPos()
         var lastEnd = typeStart
         while (true) {
-            val idTok = if (first) cc.requireToken(Token.Type.ID, "type name or type expression required") else cc.requireToken(Token.Type.ID, "identifier expected after '.' in type")
+            val idTok =
+                if (first) cc.requireToken(Token.Type.ID, "type name or type expression required") else cc.requireToken(
+                    Token.Type.ID,
+                    "identifier expected after '.' in type"
+                )
             first = false
             segments += MiniTypeName.Segment(idTok.value, MiniRange(idTok.pos, idTok.pos))
             lastEnd = cc.currentPos()
@@ -796,8 +814,11 @@ class Compiler(
         // Helper to build MiniTypeRef (base or generic)
         fun buildBaseRef(rangeEnd: Pos, args: List<MiniTypeRef>?, nullable: Boolean): MiniTypeRef {
             val base = MiniTypeName(MiniRange(typeStart, rangeEnd), segments.toList(), nullable = false)
-            return if (args == null || args.isEmpty()) base.copy(range = MiniRange(typeStart, rangeEnd), nullable = nullable)
-            else net.sergeych.lyng.miniast.MiniGenericType(MiniRange(typeStart, rangeEnd), base, args, nullable)
+            return if (args == null || args.isEmpty()) base.copy(
+                range = MiniRange(typeStart, rangeEnd),
+                nullable = nullable
+            )
+            else MiniGenericType(MiniRange(typeStart, rangeEnd), base, args, nullable)
         }
 
         // Optional generic arguments: '<' Type (',' Type)* '>' — single-level only (no nested generics for now)
@@ -811,12 +832,17 @@ class Compiler(
                 var argFirst = true
                 val argStart = cc.currentPos()
                 while (true) {
-                    val idTok = if (argFirst) cc.requireToken(Token.Type.ID, "type argument name expected") else cc.requireToken(Token.Type.ID, "identifier expected after '.' in type argument")
+                    val idTok = if (argFirst) cc.requireToken(
+                        Token.Type.ID,
+                        "type argument name expected"
+                    ) else cc.requireToken(Token.Type.ID, "identifier expected after '.' in type argument")
                     argFirst = false
                     argSegs += MiniTypeName.Segment(idTok.value, MiniRange(idTok.pos, idTok.pos))
                     val p = cc.savePos()
                     val tt = cc.next()
-                    if (tt.type == Token.Type.DOT) continue else { cc.restorePos(p); break }
+                    if (tt.type == Token.Type.DOT) continue else {
+                        cc.restorePos(p); break
+                    }
                 }
                 val argNullable = cc.skipTokenOfType(Token.Type.QUESTION, isOptional = true)
                 val argEnd = cc.currentPos()
@@ -825,7 +851,9 @@ class Compiler(
 
                 val sep = cc.next()
                 when (sep.type) {
-                    Token.Type.COMMA -> { /* continue */ }
+                    Token.Type.COMMA -> { /* continue */
+                    }
+
                     Token.Type.GT -> break
                     else -> sep.raiseSyntax("expected ',' or '>' in generic arguments")
                 }
@@ -853,6 +881,21 @@ class Compiler(
     private suspend fun parseArgs(): Pair<List<ParsedArgument>, Boolean> {
 
         val args = mutableListOf<ParsedArgument>()
+        suspend fun tryParseNamedArg(): ParsedArgument? {
+            val save = cc.savePos()
+            val t1 = cc.next()
+            if (t1.type == Token.Type.ID) {
+                val t2 = cc.next()
+                if (t2.type == Token.Type.COLON) {
+                    // name: expr
+                    val name = t1.value
+                    val rhs = parseExpression() ?: t2.raiseSyntax("expected expression after named argument '${name}:'")
+                    return ParsedArgument(rhs, t1.pos, isSplat = false, name = name)
+                }
+            }
+            cc.restorePos(save)
+            return null
+        }
         do {
             val t = cc.next()
             when (t.type) {
@@ -867,10 +910,14 @@ class Compiler(
 
                 else -> {
                     cc.previous()
+                    val named = tryParseNamedArg()
+                    if (named != null) {
+                        args += named
+                    } else {
                         parseExpression()?.let { args += ParsedArgument(it, t.pos) }
                             ?: throw ScriptError(t.pos, "Expecting arguments list")
-                    if (cc.current().type == Token.Type.COLON)
-                        parseTypeDeclaration()
+                        // In call-site arguments, ':' is reserved for named args. Do not parse type declarations here.
+                    }
                     // Here should be a valid termination:
                 }
             }
@@ -901,6 +948,20 @@ class Compiler(
      */
     private suspend fun parseArgsNoTailBlock(): List<ParsedArgument> {
         val args = mutableListOf<ParsedArgument>()
+        suspend fun tryParseNamedArg(): ParsedArgument? {
+            val save = cc.savePos()
+            val t1 = cc.next()
+            if (t1.type == Token.Type.ID) {
+                val t2 = cc.next()
+                if (t2.type == Token.Type.COLON) {
+                    val name = t1.value
+                    val rhs = parseExpression() ?: t2.raiseSyntax("expected expression after named argument '${name}:'")
+                    return ParsedArgument(rhs, t1.pos, isSplat = false, name = name)
+                }
+            }
+            cc.restorePos(save)
+            return null
+        }
         do {
             val t = cc.next()
             when (t.type) {
@@ -915,10 +976,14 @@ class Compiler(
 
                 else -> {
                     cc.previous()
+                    val named = tryParseNamedArg()
+                    if (named != null) {
+                        args += named
+                    } else {
                         parseExpression()?.let { args += ParsedArgument(it, t.pos) }
                             ?: throw ScriptError(t.pos, "Expecting arguments list")
-                    if (cc.current().type == Token.Type.COLON)
-                        parseTypeDeclaration()
+                        // Do not parse type declarations in call args
+                    }
                 }
             }
         } while (t.type != Token.Type.RPAREN)
@@ -934,11 +999,14 @@ class Compiler(
     ): ObjRef {
         var detectedBlockArgument = blockArgument
         val args = if (blockArgument) {
-            val blockArg = ParsedArgument(
-                parseExpression()
-                    ?: throw ScriptError(cc.currentPos(), "lambda body expected"), cc.currentPos()
-            )
-            listOf(blockArg)
+            // Leading '{' has already been consumed by the caller token branch.
+            // Parse only the lambda expression as the last argument and DO NOT
+            // allow any subsequent selectors (like ".last()") to be absorbed
+            // into the lambda body. This ensures expected order:
+            //   foo { ... }.bar()  ==  (foo { ... }).bar()
+            val callableAccessor = parseLambdaExpression()
+            val argStmt = statement { callableAccessor.get(this).value }
+            listOf(ParsedArgument(argStmt, cc.currentPos()))
         } else {
             val r = parseArgs()
             detectedBlockArgument = r.second
@@ -1058,6 +1126,7 @@ class Compiler(
             pendingDeclDoc = consumePendingDoc()
             parseVarDeclaration(false, Visibility.Public)
         }
+
         "var" -> {
             pendingDeclStart = id.pos
             pendingDeclDoc = consumePendingDoc()
@@ -1069,6 +1138,7 @@ class Compiler(
             pendingDeclDoc = consumePendingDoc()
             parseFunctionDeclaration(isOpen = false, isExtern = false, isStatic = false)
         }
+
         "fn" -> {
             pendingDeclStart = id.pos
             pendingDeclDoc = consumePendingDoc()
@@ -1085,11 +1155,24 @@ class Compiler(
             when (k.value) {
                 "val" -> parseVarDeclaration(false, Visibility.Private, isStatic = isStatic)
                 "var" -> parseVarDeclaration(true, Visibility.Private, isStatic = isStatic)
-                "fun" -> parseFunctionDeclaration(visibility = Visibility.Private, isOpen = false, isExtern = false, isStatic = isStatic)
-                "fn" -> parseFunctionDeclaration(visibility = Visibility.Private, isOpen = false, isExtern = false, isStatic = isStatic)
+                "fun" -> parseFunctionDeclaration(
+                    visibility = Visibility.Private,
+                    isOpen = false,
+                    isExtern = false,
+                    isStatic = isStatic
+                )
+
+                "fn" -> parseFunctionDeclaration(
+                    visibility = Visibility.Private,
+                    isOpen = false,
+                    isExtern = false,
+                    isStatic = isStatic
+                )
+
                 else -> k.raiseSyntax("unsupported private declaration kind: ${k.value}")
             }
         }
+
         "protected" -> {
             var k = cc.requireToken(Token.Type.ID, "declaration expected after 'protected'")
             var isStatic = false
@@ -1100,11 +1183,24 @@ class Compiler(
             when (k.value) {
                 "val" -> parseVarDeclaration(false, Visibility.Protected, isStatic = isStatic)
                 "var" -> parseVarDeclaration(true, Visibility.Protected, isStatic = isStatic)
-                "fun" -> parseFunctionDeclaration(visibility = Visibility.Protected, isOpen = false, isExtern = false, isStatic = isStatic)
-                "fn" -> parseFunctionDeclaration(visibility = Visibility.Protected, isOpen = false, isExtern = false, isStatic = isStatic)
+                "fun" -> parseFunctionDeclaration(
+                    visibility = Visibility.Protected,
+                    isOpen = false,
+                    isExtern = false,
+                    isStatic = isStatic
+                )
+
+                "fn" -> parseFunctionDeclaration(
+                    visibility = Visibility.Protected,
+                    isOpen = false,
+                    isExtern = false,
+                    isStatic = isStatic
+                )
+
                 else -> k.raiseSyntax("unsupported protected declaration kind: ${k.value}")
             }
         }
+
         "while" -> parseWhileStatement()
         "do" -> parseDoWhileStatement()
         "for" -> parseForStatement()
@@ -1116,11 +1212,13 @@ class Compiler(
             pendingDeclDoc = consumePendingDoc()
             parseClassDeclaration()
         }
+
         "enum" -> {
             pendingDeclStart = id.pos
             pendingDeclDoc = consumePendingDoc()
             parseEnumDeclaration()
         }
+
         "try" -> parseTryStatement()
         "throw" -> parseThrowStatement(id.pos)
         "when" -> parseWhenStatement()
@@ -1130,9 +1228,10 @@ class Compiler(
             val isExtern = cc.skipId("extern")
             when {
                 cc.matchQualifiers("fun", "private") -> {
-                    pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc();
+                    pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc()
                     parseFunctionDeclaration(Visibility.Private, isExtern)
                 }
+
                 cc.matchQualifiers("fun", "private", "static") -> parseFunctionDeclaration(
                     Visibility.Private,
                     isExtern,
@@ -1149,27 +1248,78 @@ class Compiler(
                 cc.matchQualifiers("fun", "open") -> parseFunctionDeclaration(isOpen = true, isExtern = isExtern)
                 cc.matchQualifiers("fn", "open") -> parseFunctionDeclaration(isOpen = true, isExtern = isExtern)
 
-                cc.matchQualifiers("fun") -> { pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseFunctionDeclaration(isOpen = false, isExtern = isExtern) }
-                cc.matchQualifiers("fn") -> { pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseFunctionDeclaration(isOpen = false, isExtern = isExtern) }
+                cc.matchQualifiers("fun") -> {
+                    pendingDeclStart = id.pos; pendingDeclDoc =
+                        consumePendingDoc(); parseFunctionDeclaration(isOpen = false, isExtern = isExtern)
+                }
 
-                cc.matchQualifiers("val", "private", "static") -> { pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseVarDeclaration(
+                cc.matchQualifiers("fn") -> {
+                    pendingDeclStart = id.pos; pendingDeclDoc =
+                        consumePendingDoc(); parseFunctionDeclaration(isOpen = false, isExtern = isExtern)
+                }
+
+                cc.matchQualifiers("val", "private", "static") -> {
+                    pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseVarDeclaration(
                         false,
                         Visibility.Private,
                         isStatic = true
-                ) }
+                    )
+                }
 
-                cc.matchQualifiers("val", "static") -> { pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseVarDeclaration(false, Visibility.Public, isStatic = true) }
-                cc.matchQualifiers("val", "private") -> { pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseVarDeclaration(false, Visibility.Private) }
-                cc.matchQualifiers("var", "static") -> { pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseVarDeclaration(true, Visibility.Public, isStatic = true) }
-                cc.matchQualifiers("var", "static", "private") -> { pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseVarDeclaration(
+                cc.matchQualifiers("val", "static") -> {
+                    pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseVarDeclaration(
+                        false,
+                        Visibility.Public,
+                        isStatic = true
+                    )
+                }
+
+                cc.matchQualifiers("val", "private") -> {
+                    pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseVarDeclaration(
+                        false,
+                        Visibility.Private
+                    )
+                }
+
+                cc.matchQualifiers("var", "static") -> {
+                    pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseVarDeclaration(
+                        true,
+                        Visibility.Public,
+                        isStatic = true
+                    )
+                }
+
+                cc.matchQualifiers("var", "static", "private") -> {
+                    pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseVarDeclaration(
                         true,
                         Visibility.Private,
                         isStatic = true
-                ) }
+                    )
+                }
+
+                cc.matchQualifiers("var", "private") -> {
+                    pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseVarDeclaration(
+                        true,
+                        Visibility.Private
+                    )
+                }
+
+                cc.matchQualifiers("val", "open") -> {
+                    pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseVarDeclaration(
+                        false,
+                        Visibility.Private,
+                        true
+                    )
+                }
+
+                cc.matchQualifiers("var", "open") -> {
+                    pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseVarDeclaration(
+                        true,
+                        Visibility.Private,
+                        true
+                    )
+                }
 
-                cc.matchQualifiers("var", "private") -> { pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseVarDeclaration(true, Visibility.Private) }
-                cc.matchQualifiers("val", "open") -> { pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseVarDeclaration(false, Visibility.Private, true) }
-                cc.matchQualifiers("var", "open") -> { pendingDeclStart = id.pos; pendingDeclDoc = consumePendingDoc(); parseVarDeclaration(true, Visibility.Private, true) }
                 else -> {
                     cc.next()
                     null
@@ -1306,9 +1456,10 @@ class Compiler(
                     errorObject.extraData,
                     errorObject.useStackTrace
                 )
+
                 else -> throwScope.raiseError("this is not an exception object: $errorObject")
             }
-            throwScope.raiseError(errorObject as ObjException)
+            throwScope.raiseError(errorObject)
         }
     }
 
@@ -1473,6 +1624,7 @@ class Compiler(
 
             // Optional base list: ":" Base ("," Base)* where Base := ID ( "(" args? ")" )?
             data class BaseSpec(val name: String, val args: List<ParsedArgument>?)
+
             val baseSpecs = mutableListOf<BaseSpec>()
             if (cc.skipTokenOfType(Token.Type.COLON, isOptional = true)) {
                 do {
@@ -1516,13 +1668,13 @@ class Compiler(
                 val declRange = MiniRange(pendingDeclStart ?: nameToken.pos, cc.currentPos())
                 val bases = baseSpecs.map { it.name }
                 // Collect constructor fields declared as val/var in primary constructor
-                val ctorFields = mutableListOf<net.sergeych.lyng.miniast.MiniCtorField>()
+                val ctorFields = mutableListOf<MiniCtorField>()
                 constructorArgsDeclaration?.let { ad ->
                     for (p in ad.params) {
                         val at = p.accessType
                         if (at != null) {
                             val mutable = at == AccessType.Var
-                            ctorFields += net.sergeych.lyng.miniast.MiniCtorField(
+                            ctorFields += MiniCtorField(
                                 name = p.name,
                                 mutable = mutable,
                                 type = p.miniType,
@@ -1571,7 +1723,8 @@ class Compiler(
                 // accessors, constructor registration, etc.
                 // Resolve parent classes by name at execution time
                 val parentClasses = baseSpecs.map { baseSpec ->
-                    val rec = this[baseSpec.name] ?: throw ScriptError(nameToken.pos, "unknown base class: ${baseSpec.name}")
+                    val rec =
+                        this[baseSpec.name] ?: throw ScriptError(nameToken.pos, "unknown base class: ${baseSpec.name}")
                     (rec.value as? ObjClass) ?: throw ScriptError(nameToken.pos, "${baseSpec.name} is not a class")
                 }
 
@@ -2082,7 +2235,7 @@ class Compiler(
             val paramNames: Set<String> = argsDeclaration.params.map { it.name }.toSet()
 
             // Parse function body while tracking declared locals to compute precise capacity hints
-            val fnLocalDeclStart = currentLocalDeclCount
+            currentLocalDeclCount
             localDeclCountStack.add(0)
             val fnStatements = if (isExtern)
                 statement { raiseError("extern function not provided: $name") }
@@ -2113,7 +2266,7 @@ class Compiler(
                 }
                 fnStatements.execute(context)
             }
-            val enclosingCtx = parentContext
+            parentContext
             val fnCreateStatement = statement(start) { context ->
                 // we added fn in the context. now we must save closure
                 // for the function, unless we're in the class scope:
@@ -2363,7 +2516,7 @@ class Compiler(
     ) {
 //        fun isLeftAssociative() = tokenType != Token.Type.OR && tokenType != Token.Type.AND
 
-        companion object {}
+        companion object
 
     }
 
@@ -2377,15 +2530,24 @@ class Compiler(
          * Compile [source] while streaming a Mini-AST into the provided [sink].
          * When [sink] is null, behaves like [compile].
          */
-        suspend fun compileWithMini(source: Source, importManager: ImportProvider, sink: net.sergeych.lyng.miniast.MiniAstSink?): Script {
-            return Compiler(CompilerContext(parseLyng(source)), importManager, Settings(miniAstSink = sink)).parseScript()
+        suspend fun compileWithMini(
+            source: Source,
+            importManager: ImportProvider,
+            sink: MiniAstSink?
+        ): Script {
+            return Compiler(
+                CompilerContext(parseLyng(source)),
+                importManager,
+                Settings(miniAstSink = sink)
+            ).parseScript()
         }
 
         /** Convenience overload to compile raw [code] with a Mini-AST [sink]. */
-        suspend fun compileWithMini(code: String, sink: net.sergeych.lyng.miniast.MiniAstSink?): Script =
+        suspend fun compileWithMini(code: String, sink: MiniAstSink?): Script =
             compileWithMini(Source("<eval>", code), Script.defaultImportManager, sink)
 
         private var lastPriority = 0
+
         // Helpers for conservative constant folding (literal-only). Only pure, side-effect-free ops.
         private fun constOf(r: ObjRef): Obj? = (r as? ConstRef)?.constValue
 
@@ -2404,30 +2566,35 @@ class Compiler(
                     a is ObjChar && b is ObjChar -> if (a.value == b.value) ObjTrue else ObjFalse
                     else -> null
                 }
+
                 BinOp.NEQ -> when {
                     a is ObjInt && b is ObjInt -> if (a.value != b.value) ObjTrue else ObjFalse
                     a is ObjString && b is ObjString -> if (a.value != b.value) ObjTrue else ObjFalse
                     a is ObjChar && b is ObjChar -> if (a.value != b.value) ObjTrue else ObjFalse
                     else -> null
                 }
+
                 BinOp.LT -> when {
                     a is ObjInt && b is ObjInt -> if (a.value < b.value) ObjTrue else ObjFalse
                     a is ObjString && b is ObjString -> if (a.value < b.value) ObjTrue else ObjFalse
                     a is ObjChar && b is ObjChar -> if (a.value < b.value) ObjTrue else ObjFalse
                     else -> null
                 }
+
                 BinOp.LTE -> when {
                     a is ObjInt && b is ObjInt -> if (a.value <= b.value) ObjTrue else ObjFalse
                     a is ObjString && b is ObjString -> if (a.value <= b.value) ObjTrue else ObjFalse
                     a is ObjChar && b is ObjChar -> if (a.value <= b.value) ObjTrue else ObjFalse
                     else -> null
                 }
+
                 BinOp.GT -> when {
                     a is ObjInt && b is ObjInt -> if (a.value > b.value) ObjTrue else ObjFalse
                     a is ObjString && b is ObjString -> if (a.value > b.value) ObjTrue else ObjFalse
                     a is ObjChar && b is ObjChar -> if (a.value > b.value) ObjTrue else ObjFalse
                     else -> null
                 }
+
                 BinOp.GTE -> when {
                     a is ObjInt && b is ObjInt -> if (a.value >= b.value) ObjTrue else ObjFalse
                     a is ObjString && b is ObjString -> if (a.value >= b.value) ObjTrue else ObjFalse
@@ -2441,6 +2608,7 @@ class Compiler(
                     a is ObjString && b is ObjString -> ObjString(a.value + b.value)
                     else -> null
                 }
+
                 BinOp.MINUS -> if (a is ObjInt && b is ObjInt) ObjInt(a.value - b.value) else null
                 BinOp.STAR -> if (a is ObjInt && b is ObjInt) ObjInt(a.value * b.value) else null
                 BinOp.SLASH -> if (a is ObjInt && b is ObjInt && b.value != 0L) ObjInt(a.value / b.value) else null
@@ -2468,6 +2636,7 @@ class Compiler(
                     is ObjReal -> ObjReal(-a.value)
                     else -> null
                 }
+
                 UnaryOp.BITNOT -> if (a is ObjInt) ObjInt(a.value.inv()) else null
             }
         }
@@ -2638,5 +2807,5 @@ class Compiler(
     }
 }
 
-suspend fun eval(code: String) = Compiler.compile(code).execute()
+suspend fun eval(code: String) = compile(code).execute()
 

lynglib/src/commonMain/kotlin/net/sergeych/lyng/obj/ObjRef.kt

@@ -15,6 +15,8 @@
  *
  */
 
+@file:Suppress("INLINE_NOT_NEEDED", "REDUNDANT_INLINE")
+
 package net.sergeych.lyng.obj
 
 import net.sergeych.lyng.*
@@ -62,9 +64,9 @@ enum class BinOp {
 /** R-value reference for unary operations. */
 class UnaryOpRef(private val op: UnaryOp, private val a: ObjRef) : ObjRef {
     override suspend fun get(scope: Scope): ObjRecord {
-        val fastRval = net.sergeych.lyng.PerfFlags.RVAL_FASTPATH
+        val fastRval = PerfFlags.RVAL_FASTPATH
         val v = if (fastRval) a.evalValue(scope) else a.get(scope).value
-        if (net.sergeych.lyng.PerfFlags.PRIMITIVE_FASTOPS) {
+        if (PerfFlags.PRIMITIVE_FASTOPS) {
             val rFast: Obj? = when (op) {
                 UnaryOp.NOT -> if (v is ObjBool) if (!v.value) ObjTrue else ObjFalse else null
                 UnaryOp.NEGATE -> when (v) {
@@ -75,7 +77,7 @@ class UnaryOpRef(private val op: UnaryOp, private val a: ObjRef) : ObjRef {
                 UnaryOp.BITNOT -> if (v is ObjInt) ObjInt(v.value.inv()) else null
             }
             if (rFast != null) {
-                if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.primitiveFastOpsHit++
+                if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.primitiveFastOpsHit++
                 return rFast.asReadonly
             }
         }
@@ -91,11 +93,11 @@ class UnaryOpRef(private val op: UnaryOp, private val a: ObjRef) : ObjRef {
 /** R-value reference for binary operations. */
 class BinaryOpRef(private val op: BinOp, private val left: ObjRef, private val right: ObjRef) : ObjRef {
     override suspend fun get(scope: Scope): ObjRecord {
-        val a = if (net.sergeych.lyng.PerfFlags.RVAL_FASTPATH) left.evalValue(scope) else left.get(scope).value
-        val b = if (net.sergeych.lyng.PerfFlags.RVAL_FASTPATH) right.evalValue(scope) else right.get(scope).value
+        val a = if (PerfFlags.RVAL_FASTPATH) left.evalValue(scope) else left.get(scope).value
+        val b = if (PerfFlags.RVAL_FASTPATH) right.evalValue(scope) else right.get(scope).value
 
         // Primitive fast paths for common cases (guarded by PerfFlags.PRIMITIVE_FASTOPS)
-        if (net.sergeych.lyng.PerfFlags.PRIMITIVE_FASTOPS) {
+        if (PerfFlags.PRIMITIVE_FASTOPS) {
             // Fast boolean ops when both operands are ObjBool
             if (a is ObjBool && b is ObjBool) {
                 val r: Obj? = when (op) {
@@ -106,7 +108,7 @@ class BinaryOpRef(private val op: BinOp, private val left: ObjRef, private val r
                     else -> null
                 }
                 if (r != null) {
-                    if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.primitiveFastOpsHit++
+                    if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.primitiveFastOpsHit++
                     return r.asReadonly
                 }
             }
@@ -134,7 +136,7 @@ class BinaryOpRef(private val op: BinOp, private val left: ObjRef, private val r
                     else -> null
                 }
                 if (r != null) {
-                    if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.primitiveFastOpsHit++
+                    if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.primitiveFastOpsHit++
                     return r.asReadonly
                 }
             }
@@ -151,7 +153,7 @@ class BinaryOpRef(private val op: BinOp, private val left: ObjRef, private val r
                     else -> null
                 }
                 if (r != null) {
-                    if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.primitiveFastOpsHit++
+                    if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.primitiveFastOpsHit++
                     return r.asReadonly
                 }
             }
@@ -169,7 +171,7 @@ class BinaryOpRef(private val op: BinOp, private val left: ObjRef, private val r
                     else -> null
                 }
                 if (r != null) {
-                    if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.primitiveFastOpsHit++
+                    if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.primitiveFastOpsHit++
                     return r.asReadonly
                 }
             }
@@ -177,19 +179,19 @@ class BinaryOpRef(private val op: BinOp, private val left: ObjRef, private val r
             if (op == BinOp.PLUS) {
                 when {
                     a is ObjString && b is ObjInt -> {
-                        if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.primitiveFastOpsHit++
+                        if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.primitiveFastOpsHit++
                         return ObjString(a.value + b.value.toString()).asReadonly
                     }
                     a is ObjString && b is ObjChar -> {
-                        if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.primitiveFastOpsHit++
+                        if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.primitiveFastOpsHit++
                         return ObjString(a.value + b.value).asReadonly
                     }
                     b is ObjString && a is ObjInt -> {
-                        if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.primitiveFastOpsHit++
+                        if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.primitiveFastOpsHit++
                         return ObjString(a.value.toString() + b.value).asReadonly
                     }
                     b is ObjString && a is ObjChar -> {
-                        if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.primitiveFastOpsHit++
+                        if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.primitiveFastOpsHit++
                         return ObjString(a.value.toString() + b.value).asReadonly
                     }
                 }
@@ -213,7 +215,7 @@ class BinaryOpRef(private val op: BinOp, private val left: ObjRef, private val r
                     else -> null
                 }
                 if (rNum != null) {
-                    if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.primitiveFastOpsHit++
+                    if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.primitiveFastOpsHit++
                     return rNum.asReadonly
                 }
             }
@@ -260,7 +262,7 @@ class ConditionalRef(
     private val ifFalse: ObjRef
 ) : ObjRef {
     override suspend fun get(scope: Scope): ObjRecord {
-        val condVal = if (net.sergeych.lyng.PerfFlags.RVAL_FASTPATH) condition.evalValue(scope) else condition.get(scope).value
+        val condVal = if (PerfFlags.RVAL_FASTPATH) condition.evalValue(scope) else condition.get(scope).value
         val condTrue = when (condVal) {
             is ObjBool -> condVal.value
             is ObjInt -> condVal.value != 0L
@@ -279,8 +281,8 @@ class CastRef(
     private val atPos: Pos,
 ) : ObjRef {
     override suspend fun get(scope: Scope): ObjRecord {
-        val v0 = if (net.sergeych.lyng.PerfFlags.RVAL_FASTPATH) valueRef.evalValue(scope) else valueRef.get(scope).value
-        val t = if (net.sergeych.lyng.PerfFlags.RVAL_FASTPATH) typeRef.evalValue(scope) else typeRef.get(scope).value
+        val v0 = if (PerfFlags.RVAL_FASTPATH) valueRef.evalValue(scope) else valueRef.get(scope).value
+        val t = if (PerfFlags.RVAL_FASTPATH) typeRef.evalValue(scope) else typeRef.get(scope).value
         val target = (t as? ObjClass) ?: scope.raiseClassCastError("${'$'}t is not the class instance")
         // unwrap qualified views
         val v = when (v0) {
@@ -323,7 +325,7 @@ class AssignOpRef(
 ) : ObjRef {
     override suspend fun get(scope: Scope): ObjRecord {
         val x = target.get(scope).value
-        val y = if (net.sergeych.lyng.PerfFlags.RVAL_FASTPATH) value.evalValue(scope) else value.get(scope).value
+        val y = if (PerfFlags.RVAL_FASTPATH) value.evalValue(scope) else value.get(scope).value
         val inPlace: Obj? = when (op) {
             BinOp.PLUS -> x.plusAssign(scope, y)
             BinOp.MINUS -> x.minusAssign(scope, y)
@@ -380,7 +382,7 @@ class IncDecRef(
 /** Elvis operator reference: a ?: b */
 class ElvisRef(private val left: ObjRef, private val right: ObjRef) : ObjRef {
     override suspend fun get(scope: Scope): ObjRecord {
-        val fastRval = net.sergeych.lyng.PerfFlags.RVAL_FASTPATH
+        val fastRval = PerfFlags.RVAL_FASTPATH
         val a = if (fastRval) left.evalValue(scope) else left.get(scope).value
         val r = if (a != ObjNull) a else if (fastRval) right.evalValue(scope) else right.get(scope).value
         return r.asReadonly
@@ -390,8 +392,8 @@ class ElvisRef(private val left: ObjRef, private val right: ObjRef) : ObjRef {
 /** Logical OR with short-circuit: a || b */
 class LogicalOrRef(private val left: ObjRef, private val right: ObjRef) : ObjRef {
     override suspend fun get(scope: Scope): ObjRecord {
-        val fastRval = net.sergeych.lyng.PerfFlags.RVAL_FASTPATH
-        val fastPrim = net.sergeych.lyng.PerfFlags.PRIMITIVE_FASTOPS
+        val fastRval = PerfFlags.RVAL_FASTPATH
+        val fastPrim = PerfFlags.PRIMITIVE_FASTOPS
         val a = if (fastRval) left.evalValue(scope) else left.get(scope).value
         if ((a as? ObjBool)?.value == true) return ObjTrue.asReadonly
         val b = if (fastRval) right.evalValue(scope) else right.get(scope).value
@@ -408,8 +410,8 @@ class LogicalOrRef(private val left: ObjRef, private val right: ObjRef) : ObjRef
 class LogicalAndRef(private val left: ObjRef, private val right: ObjRef) : ObjRef {
     override suspend fun get(scope: Scope): ObjRecord {
         // Hoist flags to locals for JIT friendliness
-        val fastRval = net.sergeych.lyng.PerfFlags.RVAL_FASTPATH
-        val fastPrim = net.sergeych.lyng.PerfFlags.PRIMITIVE_FASTOPS
+        val fastRval = PerfFlags.RVAL_FASTPATH
+        val fastPrim = PerfFlags.PRIMITIVE_FASTOPS
         val a = if (fastRval) left.evalValue(scope) else left.get(scope).value
         if ((a as? ObjBool)?.value == false) return ObjFalse.asReadonly
         val b = if (fastRval) right.evalValue(scope) else right.get(scope).value
@@ -459,18 +461,18 @@ class FieldRef(
     private var rAccesses: Int = 0; private var rMisses: Int = 0; private var rPromotedTo4: Boolean = false
     private var wAccesses: Int = 0; private var wMisses: Int = 0; private var wPromotedTo4: Boolean = false
     private inline fun size4ReadsEnabled(): Boolean =
-        net.sergeych.lyng.PerfFlags.FIELD_PIC_SIZE_4 ||
-            (net.sergeych.lyng.PerfFlags.PIC_ADAPTIVE_2_TO_4 && rPromotedTo4)
+        PerfFlags.FIELD_PIC_SIZE_4 ||
+            (PerfFlags.PIC_ADAPTIVE_2_TO_4 && rPromotedTo4)
     private inline fun size4WritesEnabled(): Boolean =
-        net.sergeych.lyng.PerfFlags.FIELD_PIC_SIZE_4 ||
-            (net.sergeych.lyng.PerfFlags.PIC_ADAPTIVE_2_TO_4 && wPromotedTo4)
+        PerfFlags.FIELD_PIC_SIZE_4 ||
+            (PerfFlags.PIC_ADAPTIVE_2_TO_4 && wPromotedTo4)
     private fun noteReadHit() {
-        if (!net.sergeych.lyng.PerfFlags.PIC_ADAPTIVE_2_TO_4) return
+        if (!PerfFlags.PIC_ADAPTIVE_2_TO_4) return
         val a = (rAccesses + 1).coerceAtMost(1_000_000)
         rAccesses = a
     }
     private fun noteReadMiss() {
-        if (!net.sergeych.lyng.PerfFlags.PIC_ADAPTIVE_2_TO_4) return
+        if (!PerfFlags.PIC_ADAPTIVE_2_TO_4) return
         val a = (rAccesses + 1).coerceAtMost(1_000_000)
         rAccesses = a
         rMisses = (rMisses + 1).coerceAtMost(1_000_000)
@@ -482,12 +484,12 @@ class FieldRef(
         }
     }
     private fun noteWriteHit() {
-        if (!net.sergeych.lyng.PerfFlags.PIC_ADAPTIVE_2_TO_4) return
+        if (!PerfFlags.PIC_ADAPTIVE_2_TO_4) return
         val a = (wAccesses + 1).coerceAtMost(1_000_000)
         wAccesses = a
     }
     private fun noteWriteMiss() {
-        if (!net.sergeych.lyng.PerfFlags.PIC_ADAPTIVE_2_TO_4) return
+        if (!PerfFlags.PIC_ADAPTIVE_2_TO_4) return
         val a = (wAccesses + 1).coerceAtMost(1_000_000)
         wAccesses = a
         wMisses = (wMisses + 1).coerceAtMost(1_000_000)
@@ -498,15 +500,15 @@ class FieldRef(
     }
 
     override suspend fun get(scope: Scope): ObjRecord {
-        val fastRval = net.sergeych.lyng.PerfFlags.RVAL_FASTPATH
-        val fieldPic = net.sergeych.lyng.PerfFlags.FIELD_PIC
-        val picCounters = net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS
+        val fastRval = PerfFlags.RVAL_FASTPATH
+        val fieldPic = PerfFlags.FIELD_PIC
+        val picCounters = PerfFlags.PIC_DEBUG_COUNTERS
         val base = if (fastRval) target.evalValue(scope) else target.get(scope).value
         if (base == ObjNull && isOptional) return ObjNull.asMutable
         if (fieldPic) {
             val (key, ver) = receiverKeyAndVersion(base)
             rGetter1?.let { g -> if (key == rKey1 && ver == rVer1) {
-                if (picCounters) net.sergeych.lyng.PerfStats.fieldPicHit++
+                if (picCounters) PerfStats.fieldPicHit++
                 noteReadHit()
                 val rec0 = g(base, scope)
                 if (base is ObjClass) {
@@ -516,7 +518,7 @@ class FieldRef(
                 return rec0
             } }
             rGetter2?.let { g -> if (key == rKey2 && ver == rVer2) {
-                if (picCounters) net.sergeych.lyng.PerfStats.fieldPicHit++
+                if (picCounters) PerfStats.fieldPicHit++
                 noteReadHit()
                 // move-to-front: promote 2→1
                 val tK = rKey2; val tV = rVer2; val tG = rGetter2
@@ -530,7 +532,7 @@ class FieldRef(
                 return rec0
             } }
             if (size4ReadsEnabled()) rGetter3?.let { g -> if (key == rKey3 && ver == rVer3) {
-                if (picCounters) net.sergeych.lyng.PerfStats.fieldPicHit++
+                if (picCounters) PerfStats.fieldPicHit++
                 noteReadHit()
                 // move-to-front: promote 3→1
                 val tK = rKey3; val tV = rVer3; val tG = rGetter3
@@ -545,7 +547,7 @@ class FieldRef(
                 return rec0
             } }
             if (size4ReadsEnabled()) rGetter4?.let { g -> if (key == rKey4 && ver == rVer4) {
-                if (picCounters) net.sergeych.lyng.PerfStats.fieldPicHit++
+                if (picCounters) PerfStats.fieldPicHit++
                 noteReadHit()
                 // move-to-front: promote 4→1
                 val tK = rKey4; val tV = rVer4; val tG = rGetter4
@@ -561,7 +563,7 @@ class FieldRef(
                 return rec0
             } }
             // Slow path
-            if (picCounters) net.sergeych.lyng.PerfStats.fieldPicMiss++
+            if (picCounters) PerfStats.fieldPicMiss++
             noteReadMiss()
             val rec = try {
                 base.readField(scope, name)
@@ -606,8 +608,8 @@ class FieldRef(
     }
 
     override suspend fun setAt(pos: Pos, scope: Scope, newValue: Obj) {
-        val fieldPic = net.sergeych.lyng.PerfFlags.FIELD_PIC
-        val picCounters = net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS
+        val fieldPic = PerfFlags.FIELD_PIC
+        val picCounters = PerfFlags.PIC_DEBUG_COUNTERS
         val base = target.get(scope).value
         if (base == ObjNull && isOptional) {
             // no-op on null receiver for optional chaining assignment
@@ -629,12 +631,12 @@ class FieldRef(
         if (fieldPic) {
             val (key, ver) = receiverKeyAndVersion(base)
             wSetter1?.let { s -> if (key == wKey1 && ver == wVer1) {
-                if (picCounters) net.sergeych.lyng.PerfStats.fieldPicSetHit++
+                if (picCounters) PerfStats.fieldPicSetHit++
                 noteWriteHit()
                 return s(base, scope, newValue)
             } }
             wSetter2?.let { s -> if (key == wKey2 && ver == wVer2) {
-                if (picCounters) net.sergeych.lyng.PerfStats.fieldPicSetHit++
+                if (picCounters) PerfStats.fieldPicSetHit++
                 noteWriteHit()
                 // move-to-front: promote 2→1
                 val tK = wKey2; val tV = wVer2; val tS = wSetter2
@@ -643,7 +645,7 @@ class FieldRef(
                 return s(base, scope, newValue)
             } }
             if (size4WritesEnabled()) wSetter3?.let { s -> if (key == wKey3 && ver == wVer3) {
-                if (picCounters) net.sergeych.lyng.PerfStats.fieldPicSetHit++
+                if (picCounters) PerfStats.fieldPicSetHit++
                 noteWriteHit()
                 // move-to-front: promote 3→1
                 val tK = wKey3; val tV = wVer3; val tS = wSetter3
@@ -653,7 +655,7 @@ class FieldRef(
                 return s(base, scope, newValue)
             } }
             if (size4WritesEnabled()) wSetter4?.let { s -> if (key == wKey4 && ver == wVer4) {
-                if (picCounters) net.sergeych.lyng.PerfStats.fieldPicSetHit++
+                if (picCounters) PerfStats.fieldPicSetHit++
                 noteWriteHit()
                 // move-to-front: promote 4→1
                 val tK = wKey4; val tV = wVer4; val tS = wSetter4
@@ -664,7 +666,7 @@ class FieldRef(
                 return s(base, scope, newValue)
             } }
             // Slow path
-            if (picCounters) net.sergeych.lyng.PerfStats.fieldPicSetMiss++
+            if (picCounters) PerfStats.fieldPicSetMiss++
             noteWriteMiss()
             base.writeField(scope, name, newValue)
             // Install move-to-front with a handle-aware setter; honor PIC size flag
@@ -707,26 +709,26 @@ class FieldRef(
 
     override suspend fun evalValue(scope: Scope): Obj {
         // Mirror get(), but return raw Obj to avoid transient ObjRecord on R-value paths
-        val fastRval = net.sergeych.lyng.PerfFlags.RVAL_FASTPATH
-        val fieldPic = net.sergeych.lyng.PerfFlags.FIELD_PIC
-        val picCounters = net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS
+        val fastRval = PerfFlags.RVAL_FASTPATH
+        val fieldPic = PerfFlags.FIELD_PIC
+        val picCounters = PerfFlags.PIC_DEBUG_COUNTERS
         val base = if (fastRval) target.evalValue(scope) else target.get(scope).value
         if (base == ObjNull && isOptional) return ObjNull
         if (fieldPic) {
             val (key, ver) = receiverKeyAndVersion(base)
             rGetter1?.let { g -> if (key == rKey1 && ver == rVer1) {
-                if (picCounters) net.sergeych.lyng.PerfStats.fieldPicHit++
+                if (picCounters) PerfStats.fieldPicHit++
                 return g(base, scope).value
             } }
             rGetter2?.let { g -> if (key == rKey2 && ver == rVer2) {
-                if (picCounters) net.sergeych.lyng.PerfStats.fieldPicHit++
+                if (picCounters) PerfStats.fieldPicHit++
                 val tK = rKey2; val tV = rVer2; val tG = rGetter2
                 rKey2 = rKey1; rVer2 = rVer1; rGetter2 = rGetter1
                 rKey1 = tK; rVer1 = tV; rGetter1 = tG
                 return g(base, scope).value
             } }
             if (size4ReadsEnabled()) rGetter3?.let { g -> if (key == rKey3 && ver == rVer3) {
-                if (picCounters) net.sergeych.lyng.PerfStats.fieldPicHit++
+                if (picCounters) PerfStats.fieldPicHit++
                 val tK = rKey3; val tV = rVer3; val tG = rGetter3
                 rKey3 = rKey2; rVer3 = rVer2; rGetter3 = rGetter2
                 rKey2 = rKey1; rVer2 = rVer1; rGetter2 = rGetter1
@@ -734,7 +736,7 @@ class FieldRef(
                 return g(base, scope).value
             } }
             if (size4ReadsEnabled()) rGetter4?.let { g -> if (key == rKey4 && ver == rVer4) {
-                if (picCounters) net.sergeych.lyng.PerfStats.fieldPicHit++
+                if (picCounters) PerfStats.fieldPicHit++
                 val tK = rKey4; val tV = rVer4; val tG = rGetter4
                 rKey4 = rKey3; rVer4 = rVer3; rGetter4 = rGetter3
                 rKey3 = rKey2; rVer3 = rVer2; rGetter3 = rGetter2
@@ -742,7 +744,7 @@ class FieldRef(
                 rKey1 = tK; rVer1 = tV; rGetter1 = tG
                 return g(base, scope).value
             } }
-            if (picCounters) net.sergeych.lyng.PerfStats.fieldPicMiss++
+            if (picCounters) PerfStats.fieldPicMiss++
             val rec = base.readField(scope, name)
             // install primary generic getter for this shape
             when (base) {
@@ -789,7 +791,7 @@ class IndexRef(
         else -> 0L to -1
     }
     override suspend fun get(scope: Scope): ObjRecord {
-        val fastRval = net.sergeych.lyng.PerfFlags.RVAL_FASTPATH
+        val fastRval = PerfFlags.RVAL_FASTPATH
         val base = if (fastRval) target.evalValue(scope) else target.get(scope).value
         if (base == ObjNull && isOptional) return ObjNull.asMutable
         val idx = if (fastRval) index.evalValue(scope) else index.get(scope).value
@@ -810,7 +812,7 @@ class IndexRef(
                 val v = base.map[idx] ?: ObjNull
                 return v.asMutable
             }
-            if (net.sergeych.lyng.PerfFlags.INDEX_PIC) {
+            if (PerfFlags.INDEX_PIC) {
                 // Polymorphic inline cache for other common shapes
                 val (key, ver) = when (base) {
                     is ObjInstance -> base.objClass.classId to base.objClass.layoutVersion
@@ -819,26 +821,26 @@ class IndexRef(
                 }
                 if (key != 0L) {
                     rGetter1?.let { g -> if (key == rKey1 && ver == rVer1) {
-                        if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.indexPicHit++
+                        if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.indexPicHit++
                         return g(base, scope, idx).asMutable
                     } }
                     rGetter2?.let { g -> if (key == rKey2 && ver == rVer2) {
-                        if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.indexPicHit++
+                        if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.indexPicHit++
                         val tk = rKey2; val tv = rVer2; val tg = rGetter2
                         rKey2 = rKey1; rVer2 = rVer1; rGetter2 = rGetter1
                         rKey1 = tk; rVer1 = tv; rGetter1 = tg
                         return g(base, scope, idx).asMutable
                     } }
-                    if (net.sergeych.lyng.PerfFlags.INDEX_PIC_SIZE_4) rGetter3?.let { g -> if (key == rKey3 && ver == rVer3) {
-                        if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.indexPicHit++
+                    if (PerfFlags.INDEX_PIC_SIZE_4) rGetter3?.let { g -> if (key == rKey3 && ver == rVer3) {
+                        if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.indexPicHit++
                         val tk = rKey3; val tv = rVer3; val tg = rGetter3
                         rKey3 = rKey2; rVer3 = rVer2; rGetter3 = rGetter2
                         rKey2 = rKey1; rVer2 = rVer1; rGetter2 = rGetter1
                         rKey1 = tk; rVer1 = tv; rGetter1 = tg
                         return g(base, scope, idx).asMutable
                     } }
-                    if (net.sergeych.lyng.PerfFlags.INDEX_PIC_SIZE_4) rGetter4?.let { g -> if (key == rKey4 && ver == rVer4) {
-                        if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.indexPicHit++
+                    if (PerfFlags.INDEX_PIC_SIZE_4) rGetter4?.let { g -> if (key == rKey4 && ver == rVer4) {
+                        if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.indexPicHit++
                         val tk = rKey4; val tv = rVer4; val tg = rGetter4
                         rKey4 = rKey3; rVer4 = rVer3; rGetter4 = rGetter3
                         rKey3 = rKey2; rVer3 = rVer2; rGetter3 = rGetter2
@@ -847,9 +849,9 @@ class IndexRef(
                         return g(base, scope, idx).asMutable
                     } }
                     // Miss: resolve and install generic handler
-                    if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.indexPicMiss++
+                    if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.indexPicMiss++
                     val v = base.getAt(scope, idx)
-                    if (net.sergeych.lyng.PerfFlags.INDEX_PIC_SIZE_4) {
+                    if (PerfFlags.INDEX_PIC_SIZE_4) {
                         rKey4 = rKey3; rVer4 = rVer3; rGetter4 = rGetter3
                         rKey3 = rKey2; rVer3 = rVer2; rGetter3 = rGetter2
                     }
@@ -863,7 +865,7 @@ class IndexRef(
     }
 
     override suspend fun evalValue(scope: Scope): Obj {
-        val fastRval = net.sergeych.lyng.PerfFlags.RVAL_FASTPATH
+        val fastRval = PerfFlags.RVAL_FASTPATH
         val base = if (fastRval) target.evalValue(scope) else target.get(scope).value
         if (base == ObjNull && isOptional) return ObjNull
         val idx = if (fastRval) index.evalValue(scope) else index.get(scope).value
@@ -882,7 +884,7 @@ class IndexRef(
             if (base is ObjMap && idx is ObjString) {
                 return base.map[idx] ?: ObjNull
             }
-            if (net.sergeych.lyng.PerfFlags.INDEX_PIC) {
+            if (PerfFlags.INDEX_PIC) {
                 // PIC path analogous to get(), but returning raw Obj
                 val (key, ver) = when (base) {
                     is ObjInstance -> base.objClass.classId to base.objClass.layoutVersion
@@ -891,26 +893,26 @@ class IndexRef(
                 }
                 if (key != 0L) {
                     rGetter1?.let { g -> if (key == rKey1 && ver == rVer1) {
-                        if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.indexPicHit++
+                        if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.indexPicHit++
                         return g(base, scope, idx)
                     } }
                     rGetter2?.let { g -> if (key == rKey2 && ver == rVer2) {
-                        if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.indexPicHit++
+                        if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.indexPicHit++
                         val tk = rKey2; val tv = rVer2; val tg = rGetter2
                         rKey2 = rKey1; rVer2 = rVer1; rGetter2 = rGetter1
                         rKey1 = tk; rVer1 = tv; rGetter1 = tg
                         return g(base, scope, idx)
                     } }
-                    if (net.sergeych.lyng.PerfFlags.INDEX_PIC_SIZE_4) rGetter3?.let { g -> if (key == rKey3 && ver == rVer3) {
-                        if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.indexPicHit++
+                    if (PerfFlags.INDEX_PIC_SIZE_4) rGetter3?.let { g -> if (key == rKey3 && ver == rVer3) {
+                        if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.indexPicHit++
                         val tk = rKey3; val tv = rVer3; val tg = rGetter3
                         rKey3 = rKey2; rVer3 = rVer2; rGetter3 = rGetter2
                         rKey2 = rKey1; rVer2 = rVer1; rGetter2 = rGetter1
                         rKey1 = tk; rVer1 = tv; rGetter1 = tg
                         return g(base, scope, idx)
                     } }
-                    if (net.sergeych.lyng.PerfFlags.INDEX_PIC_SIZE_4) rGetter4?.let { g -> if (key == rKey4 && ver == rVer4) {
-                        if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.indexPicHit++
+                    if (PerfFlags.INDEX_PIC_SIZE_4) rGetter4?.let { g -> if (key == rKey4 && ver == rVer4) {
+                        if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.indexPicHit++
                         val tk = rKey4; val tv = rVer4; val tg = rGetter4
                         rKey4 = rKey3; rVer4 = rVer3; rGetter4 = rGetter3
                         rKey3 = rKey2; rVer3 = rVer2; rGetter3 = rGetter2
@@ -918,9 +920,9 @@ class IndexRef(
                         rKey1 = tk; rVer1 = tv; rGetter1 = tg
                         return g(base, scope, idx)
                     } }
-                    if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.indexPicMiss++
+                    if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.indexPicMiss++
                     val v = base.getAt(scope, idx)
-                    if (net.sergeych.lyng.PerfFlags.INDEX_PIC_SIZE_4) {
+                    if (PerfFlags.INDEX_PIC_SIZE_4) {
                         rKey4 = rKey3; rVer4 = rVer3; rGetter4 = rGetter3
                         rKey3 = rKey2; rVer3 = rVer2; rGetter3 = rGetter2
                     }
@@ -934,7 +936,7 @@ class IndexRef(
     }
 
     override suspend fun setAt(pos: Pos, scope: Scope, newValue: Obj) {
-        val fastRval = net.sergeych.lyng.PerfFlags.RVAL_FASTPATH
+        val fastRval = PerfFlags.RVAL_FASTPATH
         val base = if (fastRval) target.evalValue(scope) else target.get(scope).value
         if (base == ObjNull && isOptional) {
             // no-op on null receiver for optional chaining assignment
@@ -953,7 +955,7 @@ class IndexRef(
                 base.map[idx] = newValue
                 return
             }
-            if (net.sergeych.lyng.PerfFlags.INDEX_PIC) {
+            if (PerfFlags.INDEX_PIC) {
                 // Polymorphic inline cache for index write
                 val (key, ver) = when (base) {
                     is ObjInstance -> base.objClass.classId to base.objClass.layoutVersion
@@ -968,14 +970,14 @@ class IndexRef(
                         wKey1 = tk; wVer1 = tv; wSetter1 = ts
                         s(base, scope, idx, newValue); return
                     } }
-                    if (net.sergeych.lyng.PerfFlags.INDEX_PIC_SIZE_4) wSetter3?.let { s -> if (key == wKey3 && ver == wVer3) {
+                    if (PerfFlags.INDEX_PIC_SIZE_4) wSetter3?.let { s -> if (key == wKey3 && ver == wVer3) {
                         val tk = wKey3; val tv = wVer3; val ts = wSetter3
                         wKey3 = wKey2; wVer3 = wVer2; wSetter3 = wSetter2
                         wKey2 = wKey1; wVer2 = wVer1; wSetter2 = wSetter1
                         wKey1 = tk; wVer1 = tv; wSetter1 = ts
                         s(base, scope, idx, newValue); return
                     } }
-                    if (net.sergeych.lyng.PerfFlags.INDEX_PIC_SIZE_4) wSetter4?.let { s -> if (key == wKey4 && ver == wVer4) {
+                    if (PerfFlags.INDEX_PIC_SIZE_4) wSetter4?.let { s -> if (key == wKey4 && ver == wVer4) {
                         val tk = wKey4; val tv = wVer4; val ts = wSetter4
                         wKey4 = wKey3; wVer4 = wVer3; wSetter4 = wSetter3
                         wKey3 = wKey2; wVer3 = wVer2; wSetter3 = wSetter2
@@ -985,7 +987,7 @@ class IndexRef(
                     } }
                     // Miss: perform write and install generic handler
                     base.putAt(scope, idx, newValue)
-                    if (net.sergeych.lyng.PerfFlags.INDEX_PIC_SIZE_4) {
+                    if (PerfFlags.INDEX_PIC_SIZE_4) {
                         wKey4 = wKey3; wVer4 = wVer3; wSetter4 = wSetter3
                         wKey3 = wKey2; wVer3 = wVer2; wSetter3 = wSetter2
                     }
@@ -1016,8 +1018,8 @@ class CallRef(
     private val isOptionalInvoke: Boolean,
 ) : ObjRef {
     override suspend fun get(scope: Scope): ObjRecord {
-        val fastRval = net.sergeych.lyng.PerfFlags.RVAL_FASTPATH
-        val usePool = net.sergeych.lyng.PerfFlags.SCOPE_POOL
+        val fastRval = PerfFlags.RVAL_FASTPATH
+        val usePool = PerfFlags.SCOPE_POOL
         val callee = if (fastRval) target.evalValue(scope) else target.get(scope).value
         if (callee == ObjNull && isOptionalInvoke) return ObjNull.asReadonly
         val callArgs = args.toArguments(scope, tailBlock)
@@ -1055,20 +1057,20 @@ class MethodCallRef(
     private var mWindowAccesses: Int = 0
     private var mWindowMisses: Int = 0
     private inline fun size4MethodsEnabled(): Boolean =
-        net.sergeych.lyng.PerfFlags.METHOD_PIC_SIZE_4 ||
-            ((net.sergeych.lyng.PerfFlags.PIC_ADAPTIVE_2_TO_4 || net.sergeych.lyng.PerfFlags.PIC_ADAPTIVE_METHODS_ONLY) && mPromotedTo4 && mFreezeWindowsLeft == 0)
+        PerfFlags.METHOD_PIC_SIZE_4 ||
+            ((PerfFlags.PIC_ADAPTIVE_2_TO_4 || PerfFlags.PIC_ADAPTIVE_METHODS_ONLY) && mPromotedTo4 && mFreezeWindowsLeft == 0)
     private fun noteMethodHit() {
-        if (!(net.sergeych.lyng.PerfFlags.PIC_ADAPTIVE_2_TO_4 || net.sergeych.lyng.PerfFlags.PIC_ADAPTIVE_METHODS_ONLY)) return
+        if (!(PerfFlags.PIC_ADAPTIVE_2_TO_4 || PerfFlags.PIC_ADAPTIVE_METHODS_ONLY)) return
         val a = (mAccesses + 1).coerceAtMost(1_000_000)
         mAccesses = a
-        if (net.sergeych.lyng.PerfFlags.PIC_ADAPTIVE_HEURISTIC) {
+        if (PerfFlags.PIC_ADAPTIVE_HEURISTIC) {
             // Windowed tracking
             mWindowAccesses = (mWindowAccesses + 1).coerceAtMost(1_000_000)
             if (mWindowAccesses >= 256) endHeuristicWindow()
         }
     }
     private fun noteMethodMiss() {
-        if (!(net.sergeych.lyng.PerfFlags.PIC_ADAPTIVE_2_TO_4 || net.sergeych.lyng.PerfFlags.PIC_ADAPTIVE_METHODS_ONLY)) return
+        if (!(PerfFlags.PIC_ADAPTIVE_2_TO_4 || PerfFlags.PIC_ADAPTIVE_METHODS_ONLY)) return
         val a = (mAccesses + 1).coerceAtMost(1_000_000)
         mAccesses = a
         mMisses = (mMisses + 1).coerceAtMost(1_000_000)
@@ -1076,7 +1078,7 @@ class MethodCallRef(
             if (mMisses * 100 / a > 20) mPromotedTo4 = true
             mAccesses = 0; mMisses = 0
         }
-        if (net.sergeych.lyng.PerfFlags.PIC_ADAPTIVE_HEURISTIC) {
+        if (PerfFlags.PIC_ADAPTIVE_HEURISTIC) {
             mWindowAccesses = (mWindowAccesses + 1).coerceAtMost(1_000_000)
             mWindowMisses = (mWindowMisses + 1).coerceAtMost(1_000_000)
             if (mWindowAccesses >= 256) endHeuristicWindow()
@@ -1106,26 +1108,26 @@ class MethodCallRef(
     }
 
     override suspend fun get(scope: Scope): ObjRecord {
-        val fastRval = net.sergeych.lyng.PerfFlags.RVAL_FASTPATH
-        val methodPic = net.sergeych.lyng.PerfFlags.METHOD_PIC
-        val picCounters = net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS
+        val fastRval = PerfFlags.RVAL_FASTPATH
+        val methodPic = PerfFlags.METHOD_PIC
+        val picCounters = PerfFlags.PIC_DEBUG_COUNTERS
         val base = if (fastRval) receiver.evalValue(scope) else receiver.get(scope).value
         if (base == ObjNull && isOptional) return ObjNull.asReadonly
         val callArgs = args.toArguments(scope, tailBlock)
         if (methodPic) {
             val (key, ver) = receiverKeyAndVersion(base)
             mInvoker1?.let { inv -> if (key == mKey1 && ver == mVer1) {
-                if (picCounters) net.sergeych.lyng.PerfStats.methodPicHit++
+                if (picCounters) PerfStats.methodPicHit++
                 noteMethodHit()
                 return inv(base, scope, callArgs).asReadonly
             } }
             mInvoker2?.let { inv -> if (key == mKey2 && ver == mVer2) {
-                if (picCounters) net.sergeych.lyng.PerfStats.methodPicHit++
+                if (picCounters) PerfStats.methodPicHit++
                 noteMethodHit()
                 return inv(base, scope, callArgs).asReadonly
             } }
             if (size4MethodsEnabled()) mInvoker3?.let { inv -> if (key == mKey3 && ver == mVer3) {
-                if (picCounters) net.sergeych.lyng.PerfStats.methodPicHit++
+                if (picCounters) PerfStats.methodPicHit++
                 noteMethodHit()
                 // move-to-front: promote 3→1
                 val tK = mKey3; val tV = mVer3; val tI = mInvoker3
@@ -1135,7 +1137,7 @@ class MethodCallRef(
                 return inv(base, scope, callArgs).asReadonly
             } }
             if (size4MethodsEnabled()) mInvoker4?.let { inv -> if (key == mKey4 && ver == mVer4) {
-                if (picCounters) net.sergeych.lyng.PerfStats.methodPicHit++
+                if (picCounters) PerfStats.methodPicHit++
                 noteMethodHit()
                 // move-to-front: promote 4→1
                 val tK = mKey4; val tV = mVer4; val tI = mInvoker4
@@ -1146,7 +1148,7 @@ class MethodCallRef(
                 return inv(base, scope, callArgs).asReadonly
             } }
             // Slow path
-            if (picCounters) net.sergeych.lyng.PerfStats.methodPicMiss++
+            if (picCounters) PerfStats.methodPicMiss++
             noteMethodMiss()
             val result = try {
                 base.invokeInstanceMethod(scope, name, callArgs)
@@ -1232,34 +1234,26 @@ class LocalVarRef(private val name: String, private val atPos: Pos) : ObjRef {
         // 1) Try fast slot/local
         if (!PerfFlags.LOCAL_SLOT_PIC) {
             scope.getSlotIndexOf(name)?.let {
-                if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.localVarPicHit++
+                if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.localVarPicHit++
                 return scope.getSlotRecord(it)
             }
-            if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.localVarPicMiss++
+            if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.localVarPicMiss++
             // 2) Fallback to current-scope object or field on `this`
             scope[name]?.let { return it }
-            val th = scope.thisObj
-            return when (th) {
-                is Obj -> th.readField(scope, name)
-                else -> scope.raiseError("symbol not defined: '$name'")
-            }
+            return scope.thisObj.readField(scope, name)
         }
         val hit = (cachedFrameId == scope.frameId && cachedSlot >= 0 && cachedSlot < scope.slotCount())
         val slot = if (hit) cachedSlot else resolveSlot(scope)
         if (slot >= 0) {
-            if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) {
-                if (hit) net.sergeych.lyng.PerfStats.localVarPicHit++ else net.sergeych.lyng.PerfStats.localVarPicMiss++
+            if (PerfFlags.PIC_DEBUG_COUNTERS) {
+                if (hit) PerfStats.localVarPicHit++ else PerfStats.localVarPicMiss++
             }
             return scope.getSlotRecord(slot)
         }
-        if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) net.sergeych.lyng.PerfStats.localVarPicMiss++
+        if (PerfFlags.PIC_DEBUG_COUNTERS) PerfStats.localVarPicMiss++
         // 2) Fallback name in scope or field on `this`
         scope[name]?.let { return it }
-        val th = scope.thisObj
-        return when (th) {
-            is Obj -> th.readField(scope, name)
-            else -> scope.raiseError("symbol not defined: '$name'")
-        }
+        return scope.thisObj.readField(scope, name)
     }
 
     override suspend fun evalValue(scope: Scope): Obj {
@@ -1268,22 +1262,14 @@ class LocalVarRef(private val name: String, private val atPos: Pos) : ObjRef {
             scope.getSlotIndexOf(name)?.let { return scope.getSlotRecord(it).value }
             // fallback to current-scope object or field on `this`
             scope[name]?.let { return it.value }
-            val th = scope.thisObj
-            return when (th) {
-                is Obj -> th.readField(scope, name).value
-                else -> scope.raiseError("symbol not defined: '$name'")
-            }
+            return scope.thisObj.readField(scope, name).value
         }
         val hit = (cachedFrameId == scope.frameId && cachedSlot >= 0 && cachedSlot < scope.slotCount())
         val slot = if (hit) cachedSlot else resolveSlot(scope)
         if (slot >= 0) return scope.getSlotRecord(slot).value
         // Fallback name in scope or field on `this`
         scope[name]?.let { return it.value }
-        val th = scope.thisObj
-        return when (th) {
-            is Obj -> th.readField(scope, name).value
-            else -> scope.raiseError("symbol not defined: '$name'")
-        }
+        return scope.thisObj.readField(scope, name).value
     }
 
     override suspend fun setAt(pos: Pos, scope: Scope, newValue: Obj) {
@@ -1301,13 +1287,9 @@ class LocalVarRef(private val name: String, private val atPos: Pos) : ObjRef {
                 return
             }
             // Fallback: write to field on `this`
-            val th = scope.thisObj
-            if (th is Obj) {
-                th.writeField(scope, name, newValue)
+            scope.thisObj.writeField(scope, name, newValue)
             return
         }
-            scope.raiseError("symbol not defined: '$name'")
-        }
         val slot = if (cachedFrameId == scope.frameId && cachedSlot >= 0 && cachedSlot < scope.slotCount()) cachedSlot else resolveSlot(scope)
         if (slot >= 0) {
             val rec = scope.getSlotRecord(slot)
@@ -1320,13 +1302,9 @@ class LocalVarRef(private val name: String, private val atPos: Pos) : ObjRef {
             else scope.raiseError("Cannot assign to immutable value")
             return
         }
-        val th = scope.thisObj
-        if (th is Obj) {
-            th.writeField(scope, name, newValue)
+        scope.thisObj.writeField(scope, name, newValue)
         return
     }
-        scope.raiseError("symbol not defined: '$name'")
-    }
 }
 
 
@@ -1401,8 +1379,8 @@ class FastLocalVarRef(
         val slot = if (ownerValid && cachedSlot >= 0) cachedSlot else resolveSlotInAncestry(scope)
         val actualOwner = cachedOwnerScope
         if (slot >= 0 && actualOwner != null) {
-            if (net.sergeych.lyng.PerfFlags.PIC_DEBUG_COUNTERS) {
-                if (ownerValid) net.sergeych.lyng.PerfStats.fastLocalHit++ else net.sergeych.lyng.PerfStats.fastLocalMiss++
+            if (PerfFlags.PIC_DEBUG_COUNTERS) {
+                if (ownerValid) PerfStats.fastLocalHit++ else PerfStats.fastLocalMiss++
             }
             return actualOwner.getSlotRecord(slot)
         }
@@ -1423,9 +1401,7 @@ class FastLocalVarRef(
         // Fallback to standard name lookup (locals or closure chain) if the slot owner changed across suspension
         scope[name]?.let { return it }
         // As a last resort, treat as field on `this`
-        val th = scope.thisObj
-        if (th is Obj) return th.readField(scope, name)
-        scope.raiseError("local '$name' is not available in this scope")
+        return scope.thisObj.readField(scope, name)
     }
 
     override suspend fun evalValue(scope: Scope): Obj {
@@ -1450,9 +1426,7 @@ class FastLocalVarRef(
         }
         // Fallback to standard name lookup (locals or closure chain)
         scope[name]?.let { return it.value }
-        val th = scope.thisObj
-        if (th is Obj) return th.readField(scope, name).value
-        scope.raiseError("local '$name' is not available in this scope")
+        return scope.thisObj.readField(scope, name).value
     }
 
     override suspend fun setAt(pos: Pos, scope: Scope, newValue: Obj) {
@@ -1485,13 +1459,9 @@ class FastLocalVarRef(
             else scope.raiseError("Cannot assign to immutable value")
             return
         }
-        val th = scope.thisObj
-        if (th is Obj) {
-            th.writeField(scope, name, newValue)
+        scope.thisObj.writeField(scope, name, newValue)
         return
     }
-        scope.raiseError("local '$name' is not available in this scope")
-    }
 }
 
 class ListLiteralRef(private val entries: List<ListEntry>) : ObjRef {
@@ -1502,11 +1472,11 @@ class ListLiteralRef(private val entries: List<ListEntry>) : ObjRef {
         for (e in entries) {
             when (e) {
                 is ListEntry.Element -> {
-                    val v = if (net.sergeych.lyng.PerfFlags.RVAL_FASTPATH) e.ref.evalValue(scope) else e.ref.get(scope).value
+                    val v = if (PerfFlags.RVAL_FASTPATH) e.ref.evalValue(scope) else e.ref.get(scope).value
                     list += v
                 }
                 is ListEntry.Spread -> {
-                    val elements = if (net.sergeych.lyng.PerfFlags.RVAL_FASTPATH) e.ref.evalValue(scope) else e.ref.get(scope).value
+                    val elements = if (PerfFlags.RVAL_FASTPATH) e.ref.evalValue(scope) else e.ref.get(scope).value
                     when (elements) {
                         is ObjList -> {
                             // Grow underlying array once when possible
@@ -1531,8 +1501,8 @@ class RangeRef(
     private val isEndInclusive: Boolean
 ) : ObjRef {
     override suspend fun get(scope: Scope): ObjRecord {
-        val l = left?.let { if (net.sergeych.lyng.PerfFlags.RVAL_FASTPATH) it.evalValue(scope) else it.get(scope).value } ?: ObjNull
-        val r = right?.let { if (net.sergeych.lyng.PerfFlags.RVAL_FASTPATH) it.evalValue(scope) else it.get(scope).value } ?: ObjNull
+        val l = left?.let { if (PerfFlags.RVAL_FASTPATH) it.evalValue(scope) else it.get(scope).value } ?: ObjNull
+        val r = right?.let { if (PerfFlags.RVAL_FASTPATH) it.evalValue(scope) else it.get(scope).value } ?: ObjNull
         return ObjRange(l, r, isEndInclusive = isEndInclusive).asReadonly
     }
 }
@@ -1544,7 +1514,7 @@ class AssignRef(
     private val atPos: Pos,
 ) : ObjRef {
     override suspend fun get(scope: Scope): ObjRecord {
-        val v = if (net.sergeych.lyng.PerfFlags.RVAL_FASTPATH) value.evalValue(scope) else value.get(scope).value
+        val v = if (PerfFlags.RVAL_FASTPATH) value.evalValue(scope) else value.get(scope).value
         val rec = target.get(scope)
         if (!rec.isMutable) throw ScriptError(atPos, "cannot assign to immutable variable")
         if (rec.value.assign(scope, v) == null) {

lynglib/src/commonTest/kotlin/NamedArgsTest.kt

@@ -0,0 +1,154 @@
+/*
+ * 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.
+ *
+ */
+
+/*
+ * Named arguments and named splats test suite
+ */
+
+import kotlinx.coroutines.test.runTest
+import net.sergeych.lyng.ExecutionError
+import net.sergeych.lyng.eval
+import kotlin.test.Test
+import kotlin.test.assertFailsWith
+
+class NamedArgsTest {
+
+    @Test
+    fun basicNamedArgsAndDefaults() = runTest {
+        eval(
+            """
+            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") )
+            """.trimIndent()
+        )
+    }
+
+    @Test
+    fun positionalAfterNamedIsError() = runTest {
+        assertFailsWith<ExecutionError> {
+            eval(
+                """
+                fun f(a, b) { [a,b] }
+                f(a: 1, 2)
+                """.trimIndent()
+            )
+        }
+    }
+
+    @Test
+    fun namedSplatsBasic() = runTest {
+        eval(
+            """
+            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)
+            """.trimIndent()
+        )
+    }
+
+    @Test
+    fun namedSplatsNonStringKeysError() = runTest {
+        assertFailsWith<ExecutionError> {
+            eval(
+                """
+                fun test(a,b) {}
+                test(1, ...Map(1 => "x"))
+                """.trimIndent()
+            )
+        }
+    }
+
+    @Test
+    fun trailingBlockConflictWhenLastNamed() = runTest {
+        // Error: last parameter already assigned by a named argument; trailing block must be rejected
+        assertFailsWith<ExecutionError> {
+            eval(
+                """
+                fun f(x, onDone) { onDone(x) }
+                // Name the last parameter inside parentheses, then try to pass a trailing block
+                f(1, onDone: { it }) { 42 }
+                """.trimIndent()
+            )
+        }
+        // Normal case still works when last parameter is not assigned by name
+        eval(
+            """
+            fun f(x, onDone) { onDone(x) }
+            var res = 0
+            f(1) { it -> res = it }
+            assertEquals(1, res)
+            """.trimIndent()
+        )
+    }
+
+    @Test
+    fun duplicateNamedIsError() = runTest {
+        assertFailsWith<ExecutionError> {
+            eval(
+                """
+                fun f(a,b,c) {}
+                f(a: 1, a: 2)
+                """.trimIndent()
+            )
+        }
+        assertFailsWith<ExecutionError> {
+            eval(
+                """
+                fun f(a,b,c) {}
+                f(a: 1, ...Map("a" => 2))
+                """.trimIndent()
+            )
+        }
+    }
+
+    @Test
+    fun unknownParameterIsError() = runTest {
+        assertFailsWith<ExecutionError> {
+            eval(
+                """
+                fun f(a,b) {}
+                f(z: 1)
+                """.trimIndent()
+            )
+        }
+    }
+
+    @Test
+    fun ellipsisCannotBeNamed() = runTest {
+        assertFailsWith<ExecutionError> {
+            eval(
+                """
+                fun g(args..., tail) {}
+                g(args: [1], tail: 2)
+                """.trimIndent()
+            )
+        }
+    }
+
+    @Test
+    fun positionalSplatAfterNamedIsError() = runTest {
+        assertFailsWith<ExecutionError> {
+            eval(
+                """
+                fun f(a,b,c) {}
+                f(a: 1, ...[2,3])
+                """.trimIndent()
+            )
+        }
+    }
+}

lynglib/src/commonTest/kotlin/ScriptTest.kt

@@ -2569,7 +2569,6 @@ class ScriptTest {
                             x += i
                         }
                         delay(100)
-                        println("-> "+x)
                         assert(x == 5050)
                     }
                 """.trimIndent())
@@ -3544,6 +3543,40 @@ class ScriptTest {
         """.trimIndent())
     }
 
+    @Test
+    fun testCallAndResultOrder() = runTest {
+        eval("""
+            import lyng.stdlib
+            
+            fun test(a="a", b="b", c="c") { [a, b, c] }
+            
+            // the parentheses here are in fact unnecessary:
+            val ok1 = (test { void }).last() 
+            assert( ok1 is Callable)
+            
+            // it should work without them, as the call test() {} must be executed
+            // first, then the result should be used to call methods on it:
+            
+            // the parentheses here are in fact unnecessary:
+            val ok2 = test { void }.last() 
+            assert( ok2 is Callable)
+        """.trimIndent())
+
+    }
+
+//    @Test
+//    fun namedArgsProposal() = runTest {
+//        eval("""
+//            import lyng.stdlib
+//
+//            fun test(a="a", b="b", c="c") { [a, b, c] }
+//
+//            val l = (test{ void }).last()
+//            println(l)
+//
+//        """.trimIndent())
+//    }
+
 
 //    @Ignore
 //    @Test

site/src/jsMain/kotlin/HomePage.kt

@@ -67,6 +67,7 @@ fun HomePage() {
                     I({ classes("bi", "bi-braces", "me-1") })
                     Text("Try Lyng")
                 }
+                // (Telegram button moved to the bottom of the page)
             }
         }
     }
@@ -105,4 +106,17 @@ assertEquals([4, 16], evens2)
             }
         }
     }
+
+    // Bottom section with a small Telegram button
+    Div({ classes("text-center", "mt-5", "pb-4") }) {
+        A(attrs = {
+            classes("btn", "btn-outline-primary", "btn-sm")
+            attr("href", "https://t.me/lynglang")
+            attr("target", "_blank")
+            attr("rel", "noopener noreferrer")
+        }) {
+            I({ classes("bi", "bi-telegram", "me-1") })
+            Text("Join our Telegram channel")
+        }
+    }
 }

site/src/jsMain/resources/index.html

@@ -146,9 +146,44 @@
       [data-bs-theme="dark"] .hl-lbl  { color: #ffa657; }
       [data-bs-theme="dark"] .hl-dir  { color: #d2a8ff; }
       [data-bs-theme="dark"] .hl-err  { color: #ffa198; text-decoration-color: #ffa198; }
+
+      /* Top-left corner ribbon for version label */
+      .corner-ribbon {
+        position: fixed;
+        /* Place below the fixed navbar (Bootstrap fixed-top ~ z-index: 1030) */
+        z-index: 1020; /* above content, below navbar */
+        top: var(--navbar-offset, 56px);
+        left: 0;
+        width: 162px; /* 10% narrower than 180px */
+        text-align: center;
+        /* Slightly asymmetric padding to visually center text within rotated band (desktop) */
+        /* Nudge text a bit lower on large screens */
+        padding: .42rem 0 .28rem;
+        font-weight: 600;
+        font-size: .75rem; /* make text smaller by default */
+        line-height: 1.1; /* stabilize vertical centering */
+        transform: translate(-52px, 10px) rotate(-45deg);
+        box-shadow: 0 0.25rem 0.5rem rgba(0,0,0,.2);
+        border: 1px solid rgba(0,0,0,.15);
+        pointer-events: none; /* decorative; don't block clicks underneath */
+      }
+      @media (max-width: 576px) {
+        .corner-ribbon {
+          width: 135px; /* 10% narrower than 150px */
+          transform: translate(-50px, 8px) rotate(-45deg);
+          font-size: .7rem; /* even smaller on phones */
+          padding: .32rem 0 .28rem; /* keep mobile text centered too */
+        }
+      }
     </style>
   </head>
   <body>
+    <!-- Top-left version ribbon -->
+    <div class="corner-ribbon bg-danger text-white">
+        <span class="me-3">
+            v1.0.1
+        </span>
+    </div>
     <!-- Fixed top navbar for the whole site -->
     <a href="#root" class="visually-hidden-focusable position-absolute top-0 start-0 m-2 px-2 py-1 bg-body border rounded">Skip to content</a>
     <nav class="navbar navbar-expand-lg bg-body-tertiary fixed-top border-bottom" role="navigation" aria-label="Primary">

site/src/jsTest/kotlin/HighlightSmokeTest.kt

@@ -63,4 +63,29 @@ class HighlightSmokeTest {
         assertTrue(html.contains("hl-op"))
     }
 
+    @Test
+    fun highlightNamedArgsAndMapSplat() {
+        val text = """
+            fun test(a,b,c,d) { [a,b,c,d] }
+            val r = test("A?", c: "C!", ...Map("d" => "D!", "b" => "B!"))
+        """.trimIndent()
+        val spans = SimpleLyngHighlighter().highlight(text)
+        val labeled = spansToLabeled(text, spans)
+        // Ensure identifier for function name appears
+        assertTrue(labeled.any { it.first == "test" && it.second == HighlightKind.Identifier })
+        // Ensure colon for named argument is tokenized as punctuation
+        assertTrue(labeled.any { it.first == ":" && it.second == HighlightKind.Punctuation })
+        // Ensure ellipsis operator present
+        assertTrue(labeled.any { it.first == "..." && it.second == HighlightKind.Operator })
+        // Ensure Map identifier is present
+        assertTrue(labeled.any { it.first == "Map" && it.second == HighlightKind.Identifier })
+    }
+
+    @Test
+    fun highlightNamedArgsHtml() {
+        val text = "val res = test( a: 1, b: 2 )"
+        val html = SiteHighlight.renderHtml(text)
+        // Expect a colon wrapped as punctuation span
+        assertTrue(html.contains("<span class=\"hl-punc\">:</span>"))
+    }
 }