[FIR] Split FirAnonymousObject to expression and declaration

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/BuilderConfigurator.kt

@@ -337,7 +337,6 @@ object BuilderConfigurator : AbstractBuilderConfigurator<FirTreeBuilder>(FirTree
         val elementsWithDefaultTypeRef = listOf(
             thisReceiverExpression,
             callableReferenceAccess,
-            anonymousObject,
             qualifiedAccessExpression,
             functionCall,
             anonymousFunction,

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/FirTreeBuilder.kt

@@ -59,7 +59,9 @@ object FirTreeBuilder : AbstractFirTreeBuilder() {
     val file = element("File", Declaration, annotatedDeclaration)
 
     val anonymousFunction = element("AnonymousFunction", Declaration, function, expression, typeParametersOwner)
-    val anonymousObject = element("AnonymousObject", Declaration, klass, controlFlowGraphOwner, expression)
+
+    val anonymousObject = element("AnonymousObject", Declaration, klass, controlFlowGraphOwner)
+    val anonymousObjectExpression = element("AnonymousObjectExpression", Expression, expression)
 
     val diagnosticHolder = element("DiagnosticHolder", Diagnostics)
 

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/ImplementationConfigurator.kt

@@ -36,6 +36,7 @@ object ImplementationConfigurator : AbstractFirTreeImplementationConfigurator()
         }
 
         impl(anonymousObject)
+        noImpl(anonymousObjectExpression)
 
         impl(typeAlias)
 
@@ -507,7 +508,6 @@ object ImplementationConfigurator : AbstractFirTreeImplementationConfigurator()
             "FirTypeProjectionWithVarianceImpl",
             "FirCallableReferenceAccessImpl",
             "FirThisReceiverExpressionImpl",
-            "FirAnonymousObjectImpl",
             "FirQualifiedAccessExpressionImpl",
             "FirFunctionCallImpl",
             "FirAnonymousFunctionImpl",

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/NodeConfigurator.kt

@@ -269,6 +269,10 @@ object NodeConfigurator : AbstractFieldConfigurator<FirTreeBuilder>(FirTreeBuild
             +symbol("FirAnonymousObjectSymbol")
         }
 
+        anonymousObjectExpression.configure {
+            +field(anonymousObject).withTransform()
+        }
+
         typeAlias.configure {
             +typeParameters
             parentArg(classLikeDeclaration, "F", typeAlias)