fixed few bugs in compiler and plugin

lyng-idea/src/main/kotlin/net/sergeych/lyng/idea/annotators/LyngExternalAnnotator.kt

@@ -88,9 +88,11 @@ class LyngExternalAnnotator : ExternalAnnotator<LyngExternalAnnotator.Input, Lyn
         // Imports: each segment as namespace/path
         mini?.imports?.forEach { imp ->
             imp.segments.forEach { seg ->
-                val start = analysis.source.offsetOf(seg.range.start)
-                val end = analysis.source.offsetOf(seg.range.end)
-                putRange(start, end, LyngHighlighterColors.NAMESPACE)
+                if (seg.range.start.source === analysis.source && seg.range.end.source === analysis.source) {
+                    val start = analysis.source.offsetOf(seg.range.start)
+                    val end = analysis.source.offsetOf(seg.range.end)
+                    putRange(start, end, LyngHighlighterColors.NAMESPACE)
+                }
             }
         }
 

lyng-idea/src/main/kotlin/net/sergeych/lyng/idea/highlight/LyngLexer.kt

@@ -35,7 +35,7 @@ class LyngLexer : LexerBase() {
         "fun", "val", "var", "class", "interface", "type", "import", "as",
         "abstract", "closed", "override", "static", "extern", "open", "private", "protected",
         "if", "else", "for", "while", "return", "true", "false", "null",
-        "when", "in", "is", "break", "continue", "try", "catch", "finally",
+        "when", "in", "is", "break", "continue", "try", "catch", "finally", "void",
         "get", "set", "object", "enum", "init", "by", "step", "property", "constructor"
     )
 

lyng-idea/src/main/kotlin/net/sergeych/lyng/idea/util/LyngAstManager.kt

@@ -26,23 +26,16 @@ import com.intellij.psi.search.FilenameIndex
 import com.intellij.psi.search.GlobalSearchScope
 import kotlinx.coroutines.runBlocking
 import net.sergeych.lyng.binding.BindingSnapshot
-import net.sergeych.lyng.miniast.BuiltinDocRegistry
-import net.sergeych.lyng.miniast.DocLookupUtils
-import net.sergeych.lyng.miniast.MiniEnumDecl
-import net.sergeych.lyng.miniast.MiniRange
-import net.sergeych.lyng.miniast.MiniScript
-import net.sergeych.lyng.tools.IdeLenientImportProvider
-import net.sergeych.lyng.tools.LyngAnalysisRequest
-import net.sergeych.lyng.tools.LyngAnalysisResult
-import net.sergeych.lyng.tools.LyngDiagnostic
-import net.sergeych.lyng.tools.LyngLanguageTools
 import net.sergeych.lyng.idea.LyngFileType
+import net.sergeych.lyng.miniast.*
+import net.sergeych.lyng.tools.*
 
 object LyngAstManager {
     private val MINI_KEY = Key.create<MiniScript>("lyng.mini.cache")
     private val BINDING_KEY = Key.create<BindingSnapshot>("lyng.binding.cache")
     private val STAMP_KEY = Key.create<Long>("lyng.mini.cache.stamp")
     private val ANALYSIS_KEY = Key.create<LyngAnalysisResult>("lyng.analysis.cache")
+    private val implicitBuiltinNames = setOf("void")
 
     fun getMiniAst(file: PsiFile): MiniScript? = runReadAction {
         getAnalysis(file)?.mini
@@ -217,7 +210,7 @@ object LyngAstManager {
             val msg = diag.message
             if (msg.startsWith("unresolved name: ")) {
                 val name = msg.removePrefix("unresolved name: ").trim()
-                name in declaredTopLevel || name in builtinTopLevel
+                name in declaredTopLevel || name in builtinTopLevel || name in implicitBuiltinNames
             } else if (msg.startsWith("unresolved member: ")) {
                 val name = msg.removePrefix("unresolved member: ").trim()
                 val range = diag.range

lyng-idea/src/test/kotlin/net/sergeych/lyng/idea/definitions/LyngDefinitionFilesTest.kt

@@ -124,4 +124,16 @@ class LyngDefinitionFilesTest : BasePlatformTestCase() {
         assertTrue("Should not report unresolved name for Declared", messages.none { it.contains("unresolved name: Declared") })
         assertTrue("Should not report unresolved member for greet", messages.none { it.contains("unresolved member: greet") })
     }
+
+    fun test_DiagnosticsDoNotReportVoidAsUnresolvedName() {
+        val code = """
+            fun f(): void {
+                return void
+            }
+        """.trimIndent()
+        myFixture.configureByText("main.lyng", code)
+        val analysis = LyngAstManager.getAnalysis(myFixture.file)
+        val messages = analysis?.diagnostics?.map { it.message } ?: emptyList()
+        assertTrue("Should not report unresolved name for void, got=$messages", messages.none { it.contains("unresolved name: void") })
+    }
 }