Refine variable resolution logic, update type alias syntax

lynglib/src/commonMain/kotlin/net/sergeych/lyng/bytecode/BytecodeCompiler.kt

@@ -7063,9 +7063,24 @@ class BytecodeCompiler(
 
     private fun isKnownClassReceiver(ref: ObjRef): Boolean {
         return when (ref) {
-            is LocalVarRef -> knownClassNames.contains(ref.name) && !knownObjectNames.contains(ref.name)
-            is LocalSlotRef -> knownClassNames.contains(ref.name) && !knownObjectNames.contains(ref.name)
-            is FastLocalVarRef -> knownClassNames.contains(ref.name) && !knownObjectNames.contains(ref.name)
+            is LocalVarRef -> {
+                val name = ref.name
+                if (localSlotIndexByName.containsKey(name)) return false
+                if (localSlotInfoMap.values.any { it.name == name }) return false
+                knownClassNames.contains(name) && !knownObjectNames.contains(name)
+            }
+            is LocalSlotRef -> {
+                val name = ref.name
+                if (localSlotIndexByName.containsKey(name)) return false
+                if (localSlotInfoMap.values.any { it.name == name }) return false
+                knownClassNames.contains(name) && !knownObjectNames.contains(name)
+            }
+            is FastLocalVarRef -> {
+                val name = ref.name
+                if (localSlotIndexByName.containsKey(name)) return false
+                if (localSlotInfoMap.values.any { it.name == name }) return false
+                knownClassNames.contains(name) && !knownObjectNames.contains(name)
+            }
             else -> false
         }
     }

lynglib/src/commonTest/kotlin/StdlibTest.kt

@@ -157,4 +157,19 @@ class StdlibTest {
         """
         )
     }
+
+    @Test
+    fun testFilter3() = runTest {
+        eval("""
+            type Numeric = Int | Real
+
+            fun process<T: Numeric>(items: List<T>): List<T> {
+                items.filter { it > 0 }.map { it * it }
+            }
+
+            val data: List<Int> = [-2, -1, 0, 1, 2]
+            println("Processed: " + process(data))
+
+        """.trimIndent())
+    }
 }

site/src/jsMain/kotlin/HomePage.kt

@@ -50,7 +50,7 @@ fun HomePage() {
             """.trimIndent(),
             """
             // Generics and type aliases
-            typealias Num = Int | Real
+            type Num = Int | Real
             
             class Box<out T: Num>(val value: T) {
                 fun get(): T = value
@@ -188,9 +188,9 @@ fun HomePage() {
         Div({ classes("text-center") }) {
             H1({ classes("display-5", "fw-bold", "mb-3") }) { Text("Welcome to Lyng") }
             P({ classes("lead", "text-muted", "mb-4") }) {
-                Text("A lightweight, expressive scripting language with strict static typing and functional power. ")
+                Text("A lightweight but extremely powerful and expressive scripting language with strict static typing and functional power. ")
                 Br()
-                Text("Run it anywhere Kotlin runs — share logic across JS, JVM, and more.")
+                Text("Run it anywhere Kotlin runs — share logic across JS, JVM, Native and more.")
             }
             Div({ classes("d-flex", "justify-content-center", "gap-2", "flex-wrap", "mb-4") }) {
                 // Benefits pills

site/src/jsMain/kotlin/TryLyngPage.kt

@@ -51,7 +51,7 @@ fun TryLyngPage(route: String) {
             initialCode ?: """
             // Welcome to Lyng! Modern scripting with strict types and generics.
 
-            typealias Numeric = Int | Real
+            type Numeric = Int | Real
 
             fun process<T: Numeric>(items: List<T>): List<T> {
                 items.filter { it > 0 }.map { it * it }