[lc] decompiled: fix and add new heuristics for stub-only search

support members and constructors

^KT-53934

analysis/decompiled/light-classes-for-decompiled-fe10/src/org/jetbrains/kotlin/analysis/decompiled/light/classes/fe10/KotlinDeclarationInCompiledFileSearcherFE10Impl.kt

@@ -1,11 +1,12 @@
 /*
- * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
 package org.jetbrains.kotlin.analysis.decompiled.light.classes.fe10
 
 import com.intellij.psi.PsiMember
+import com.intellij.psi.PsiMethod
 import org.jetbrains.kotlin.analysis.decompiled.light.classes.origin.KotlinDeclarationInCompiledFileSearcher
 import org.jetbrains.kotlin.analysis.decompiler.psi.file.KtClsFile
 import org.jetbrains.kotlin.analysis.decompiler.psi.text.BySignatureIndexer
@@ -14,27 +15,30 @@ import org.jetbrains.kotlin.analysis.decompiler.psi.text.relativeClassName
 import org.jetbrains.kotlin.load.kotlin.MemberSignature
 import org.jetbrains.kotlin.psi.KtClassOrObject
 import org.jetbrains.kotlin.psi.KtDeclaration
-import org.jetbrains.kotlin.psi.KtDeclarationContainer
+import org.jetbrains.kotlin.psi.allConstructors
 
-class KotlinDeclarationInCompiledFileSearcherFE10Impl: KotlinDeclarationInCompiledFileSearcher() {
+class KotlinDeclarationInCompiledFileSearcherFE10Impl : KotlinDeclarationInCompiledFileSearcher() {
     override fun findDeclarationInCompiledFile(file: KtClsFile, member: PsiMember, signature: MemberSignature): KtDeclaration? {
         val relativeClassName = member.relativeClassName()
         val key = ClassNameAndSignature(relativeClassName, signature)
 
         val memberName = member.name
-
         if (memberName != null && !file.isContentsLoaded && file.hasDeclarationWithKey(BySignatureIndexer, key)) {
-            val container: KtDeclarationContainer? = if (relativeClassName.isEmpty())
-                file
+            val topClassOrObject = file.declarations.singleOrNull() as? KtClassOrObject
+            val container: KtClassOrObject? = if (relativeClassName.isEmpty())
+                topClassOrObject
             else {
-                val topClassOrObject = file.declarations.singleOrNull() as? KtClassOrObject
                 relativeClassName.fold(topClassOrObject) { classOrObject, name ->
                     classOrObject?.declarations?.singleOrNull { it.name == name.asString() } as? KtClassOrObject
                 }
             }
 
-            val declaration = container?.declarations?.singleOrNull {
-                it.name == memberName
+            val declaration = if (member is PsiMethod && member.isConstructor) {
+                container?.takeIf { it.name == memberName }?.allConstructors?.singleOrNull()
+            } else {
+                container?.declarations?.singleOrNull {
+                    it.name == memberName
+                }
             }
 
             if (declaration != null) {