fix #88 fix #90 plugin with autocompletion

lynglib/src/commonMain/kotlin/net/sergeych/lyng/miniast/BuiltinDocRegistry.kt

@@ -68,8 +68,14 @@ object BuiltinDocRegistry : BuiltinDocSource {
     }
 
     override fun docsForModule(moduleName: String): List<MiniDecl> {
-        modules[moduleName]?.let { return it }
-        // Try lazy supplier once
+        // If module already present but we also have a lazy supplier for it, merge supplier once
+        modules[moduleName]?.let { existing ->
+            lazySuppliers.remove(moduleName)?.invoke()?.let { built ->
+                existing += built
+            }
+            return existing
+        }
+        // Try lazy supplier once when module is not present
         val built = lazySuppliers.remove(moduleName)?.invoke()
         if (built != null) {
             val list = modules.getOrPut(moduleName) { mutableListOf() }

lynglib/src/commonMain/kotlin/net/sergeych/lyng/miniast/CompletionEngineLight.kt

@@ -41,6 +41,8 @@ object CompletionEngineLight {
     }
 
     suspend fun completeSuspend(text: String, caret: Int): List<CompletionItem> {
+        // Ensure stdlib Obj*-defined docs (e.g., String methods) are initialized before registry lookup
+        StdlibDocsBootstrap.ensure()
         val prefix = prefixAt(text, caret)
         val mini = buildMiniAst(text)
         // Build imported modules as a UNION of MiniAst-derived and textual extraction, always including stdlib
@@ -158,7 +160,13 @@ object CompletionEngineLight {
         fun emitGroup(map: LinkedHashMap<String, MutableList<MiniMemberDecl>>) {
             for (name in map.keys.sortedBy { it.lowercase() }) {
                 val variants = map[name] ?: continue
-                val rep = variants.firstOrNull { it is MiniMemberFunDecl } ?: variants.first()
+                // Prefer a method with a known return type; else any method; else first variant
+                val rep =
+                    variants.asSequence()
+                        .filterIsInstance<MiniMemberFunDecl>()
+                        .firstOrNull { it.returnType != null }
+                        ?: variants.firstOrNull { it is MiniMemberFunDecl }
+                        ?: variants.first()
                 when (rep) {
                     is MiniMemberFunDecl -> {
                         val params = rep.params.joinToString(", ") { it.name }
@@ -168,7 +176,11 @@ object CompletionEngineLight {
                         if (ci.name.startsWith(prefix, true)) out += ci
                     }
                     is MiniMemberValDecl -> {
-                        val ci = CompletionItem(name, Kind.Field, typeText = typeOf(rep.type))
+                        // Prefer a field variant with known type if available
+                        val chosen = variants.asSequence()
+                            .filterIsInstance<MiniMemberValDecl>()
+                            .firstOrNull { it.type != null } ?: rep
+                        val ci = CompletionItem(name, Kind.Field, typeText = typeOf((chosen as MiniMemberValDecl).type))
                         if (ci.name.startsWith(prefix, true)) out += ci
                     }
                 }
@@ -177,18 +189,70 @@ object CompletionEngineLight {
 
         emitGroup(directMap)
         emitGroup(inheritedMap)
+
+        // Supplement with stdlib extension-like methods defined in root.lyng (e.g., fun String.re(...))
+        run {
+            val already = (directMap.keys + inheritedMap.keys).toMutableSet()
+            val ext = BuiltinDocRegistry.extensionMethodNamesFor(className)
+            for (name in ext) {
+                if (already.contains(name)) continue
+                val resolved = DocLookupUtils.resolveMemberWithInheritance(imported, className, name)
+                if (resolved != null) {
+                    when (val member = resolved.second) {
+                        is MiniMemberFunDecl -> {
+                            val params = member.params.joinToString(", ") { it.name }
+                            val ci = CompletionItem(name, Kind.Method, tailText = "(${params})", typeText = typeOf(member.returnType))
+                            if (ci.name.startsWith(prefix, true)) out += ci
+                            already.add(name)
+                        }
+                        is MiniMemberValDecl -> {
+                            val ci = CompletionItem(name, Kind.Field, typeText = typeOf(member.type))
+                            if (ci.name.startsWith(prefix, true)) out += ci
+                            already.add(name)
+                        }
+                    }
+                } else {
+                    // Fallback: emit simple method name without detailed types
+                    val ci = CompletionItem(name, Kind.Method, tailText = "()", typeText = null)
+                    if (ci.name.startsWith(prefix, true)) out += ci
+                    already.add(name)
+                }
+            }
+        }
     }
 
     // --- Inference helpers (text-only, PSI-free) ---
 
     private fun guessReceiverClass(text: String, dotPos: Int, imported: List<String>): String? {
         DocLookupUtils.guessClassFromCallBefore(text, dotPos, imported)?.let { return it }
-        val i = prevNonWs(text, dotPos - 1)
+        var i = prevNonWs(text, dotPos - 1)
         if (i >= 0) {
             when (text[i]) {
                 '"' -> return "String"
                 ']' -> return "List"
                 '}' -> return "Dict"
+                ')' -> {
+                    // Parenthesized expression: walk back to matching '(' and inspect the inner expression
+                    var j = i - 1
+                    var depth = 0
+                    while (j >= 0) {
+                        when (text[j]) {
+                            ')' -> depth++
+                            '(' -> if (depth == 0) break else depth--
+                        }
+                        j--
+                    }
+                    if (j >= 0 && text[j] == '(') {
+                        val innerS = (j + 1).coerceAtLeast(0)
+                        val innerE = i.coerceAtMost(text.length)
+                        if (innerS < innerE) {
+                            val inner = text.substring(innerS, innerE).trim()
+                            if (inner.startsWith('"') && inner.endsWith('"')) return "String"
+                            if (inner.startsWith('[') && inner.endsWith(']')) return "List"
+                            if (inner.startsWith('{') && inner.endsWith('}')) return "Dict"
+                        }
+                    }
+                }
             }
             // Numeric literal: decimal/int/hex/scientific
             var j = i

lynglib/src/commonMain/kotlin/net/sergeych/lyng/miniast/DocLookupUtils.kt

@@ -13,26 +13,63 @@ object DocLookupUtils {
      */
     fun canonicalImportedModules(mini: MiniScript): List<String> {
         val raw = mini.imports.map { it.segments.joinToString(".") { s -> s.name } }
-        if (raw.isEmpty()) return emptyList()
         val result = LinkedHashSet<String>()
         for (name in raw) {
             val canon = if (name.startsWith("lyng.")) name else "lyng.$name"
             result.add(canon)
         }
-        // Always make stdlib available as a fallback context for common types
+        // Always make stdlib available as a fallback context for common types,
+        // even when there are no explicit imports in the file
         result.add("lyng.stdlib")
         return result.toList()
     }
 
     fun aggregateClasses(importedModules: List<String>): Map<String, MiniClassDecl> {
-        val map = LinkedHashMap<String, MiniClassDecl>()
+        // Collect all class decls by name across modules, then merge duplicates by unioning members and bases.
+        val buckets = LinkedHashMap<String, MutableList<MiniClassDecl>>()
         for (mod in importedModules) {
             val docs = BuiltinDocRegistry.docsForModule(mod)
-            docs.filterIsInstance<MiniClassDecl>().forEach { cls ->
-                if (!map.containsKey(cls.name)) map[cls.name] = cls
+            for (cls in docs.filterIsInstance<MiniClassDecl>()) {
+                buckets.getOrPut(cls.name) { mutableListOf() }.add(cls)
             }
         }
-        return map
+
+        fun mergeClassDecls(name: String, list: List<MiniClassDecl>): MiniClassDecl {
+            if (list.isEmpty()) throw IllegalArgumentException("empty class list for $name")
+            if (list.size == 1) return list.first()
+            // Choose a representative for non-merge fields (range/nameStart/bodyRange): take the first
+            val rep = list.first()
+            val bases = LinkedHashSet<String>()
+            val members = LinkedHashMap<String, MutableList<MiniMemberDecl>>()
+            var doc: MiniDoc? = null
+            for (c in list) {
+                bases.addAll(c.bases)
+                if (doc == null && c.doc != null && c.doc.raw.isNotBlank()) doc = c.doc
+                for (m in c.members) {
+                    // Group by name to keep overloads together
+                    members.getOrPut(m.name) { mutableListOf() }.add(m)
+                }
+            }
+            // Flatten grouped members back to a list; keep stable name order
+            val mergedMembers = members.keys.sortedBy { it.lowercase() }.flatMap { members[it] ?: emptyList() }
+            return MiniClassDecl(
+                range = rep.range,
+                name = rep.name,
+                bases = bases.toList(),
+                bodyRange = rep.bodyRange,
+                ctorFields = rep.ctorFields,
+                classFields = rep.classFields,
+                doc = doc,
+                nameStart = rep.nameStart,
+                members = mergedMembers
+            )
+        }
+
+        val result = LinkedHashMap<String, MiniClassDecl>()
+        for ((name, list) in buckets) {
+            result[name] = mergeClassDecls(name, list)
+        }
+        return result
     }
 
     fun resolveMemberWithInheritance(importedModules: List<String>, className: String, member: String): Pair<String, MiniMemberDecl>? {

lynglib/src/commonMain/kotlin/net/sergeych/lyng/miniast/StdlibDocsBootstrap.kt

@@ -0,0 +1,26 @@
+/*
+ * Ensure stdlib Obj*-defined docs (like String methods added via ObjString.addFnDoc)
+ * are initialized before registry lookups for completion/quick docs.
+ */
+package net.sergeych.lyng.miniast
+
+import net.sergeych.lyng.obj.ObjString
+
+object StdlibDocsBootstrap {
+    // Simple idempotent guard; races are harmless as initializer side-effects are idempotent
+    private var ensured = false
+
+    fun ensure() {
+        if (ensured) return
+        try {
+            // Touch core Obj* types whose docs are registered via addFnDoc/addConstDoc
+            // Accessing .type forces their static initializers to run and register docs.
+            @Suppress("UNUSED_VARIABLE")
+            val _string = ObjString.type
+        } catch (_: Throwable) {
+            // Best-effort; absence should not break consumers
+        } finally {
+            ensured = true
+        }
+    }
+}