[FIR JS] Implement FirJsExportDeclarationChecker

compiler/fir/tree/src/org/jetbrains/kotlin/fir/ClassMembers.kt

@@ -10,9 +10,11 @@ import org.jetbrains.kotlin.fir.declarations.utils.isLocal
 import org.jetbrains.kotlin.fir.declarations.utils.isSynthetic
 import org.jetbrains.kotlin.fir.symbols.ConeClassLikeLookupTag
 import org.jetbrains.kotlin.fir.symbols.impl.FirCallableSymbol
+import org.jetbrains.kotlin.fir.symbols.impl.FirClassLikeSymbol
 import org.jetbrains.kotlin.fir.types.ConeClassLikeType
 import org.jetbrains.kotlin.fir.types.ConeIntersectionType
 import org.jetbrains.kotlin.fir.types.ConeKotlinType
+import org.jetbrains.kotlin.fir.types.toLookupTag
 
 fun FirCallableSymbol<*>.dispatchReceiverClassTypeOrNull(): ConeClassLikeType? =
     fir.dispatchReceiverClassTypeOrNull()
@@ -41,6 +43,15 @@ fun FirRegularClass.containingClassForLocal(): ConeClassLikeLookupTag? =
 fun FirDanglingModifierList.containingClass(): ConeClassLikeLookupTag? =
     containingClassAttr
 
+fun FirClassLikeSymbol<*>.getContainingClassLookupTag(): ConeClassLikeLookupTag? {
+    return if (classId.isLocal) {
+        (fir as? FirRegularClass)?.containingClassForLocal()
+    } else {
+        val ownerId = classId.outerClassId
+        ownerId?.toLookupTag()
+    }
+}
+
 private object ContainingClassKey : FirDeclarationDataKey()
 var FirCallableDeclaration.containingClassForStaticMemberAttr: ConeClassLikeLookupTag? by FirDeclarationDataRegistry.data(ContainingClassKey)
 var FirRegularClass.containingClassForLocalAttr: ConeClassLikeLookupTag? by FirDeclarationDataRegistry.data(ContainingClassKey)

compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/comparators/FirMemberDeclarationComparator.kt

@@ -7,9 +7,9 @@ package org.jetbrains.kotlin.fir.declarations.comparators
 
 import org.jetbrains.kotlin.fir.declarations.*
 import org.jetbrains.kotlin.fir.declarations.utils.classId
+import org.jetbrains.kotlin.fir.declarations.utils.nameOrSpecialName
 import org.jetbrains.kotlin.fir.render
 import org.jetbrains.kotlin.fir.types.FirTypeRefComparator
-import org.jetbrains.kotlin.name.Name
 
 object FirMemberDeclarationComparator : Comparator<FirMemberDeclaration> {
     // Comparing different kinds of callable members by assigning distinct priorities to those members.
@@ -28,16 +28,6 @@ object FirMemberDeclarationComparator : Comparator<FirMemberDeclaration> {
                 is FirBackingField -> 0
             }
 
-        private val FirMemberDeclaration.name: Name
-            get() = when (this) {
-                is FirCallableDeclaration ->
-                    this.symbol.callableId.callableName
-                is FirClass ->
-                    this.classId.shortClassName
-                is FirTypeAlias ->
-                    this.name
-            }
-
         override fun compare(a: FirMemberDeclaration, b: FirMemberDeclaration): Int {
             val priorityDiff = a.priority - b.priority
             if (priorityDiff != 0) {
@@ -51,7 +41,7 @@ object FirMemberDeclarationComparator : Comparator<FirMemberDeclaration> {
                 return 0
             }
 
-            return a.name.compareTo(b.name)
+            return a.nameOrSpecialName.compareTo(b.nameOrSpecialName)
         }
     }
 

compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/utils/FirDeclarationUtil.kt

@@ -9,6 +9,7 @@ import org.jetbrains.kotlin.fir.declarations.*
 import org.jetbrains.kotlin.fir.types.ConeClassLikeType
 import org.jetbrains.kotlin.fir.types.coneTypeSafe
 import org.jetbrains.kotlin.name.ClassId
+import org.jetbrains.kotlin.name.Name
 
 val FirTypeAlias.expandedConeType: ConeClassLikeType? get() = expandedTypeRef.coneTypeSafe()
 
@@ -45,3 +46,13 @@ val FirDeclaration.isNonLocal
     }
 
 val FirCallableDeclaration.isExtension get() = receiverParameter != null
+
+val FirMemberDeclaration.nameOrSpecialName: Name
+    get() = when (this) {
+        is FirCallableDeclaration ->
+            this.symbol.callableId.callableName
+        is FirClass ->
+            this.classId.shortClassName
+        is FirTypeAlias ->
+            this.name
+    }