[FIR] Get rid of FirResolvedFunctionTypeRef

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirSpecificTypeResolverTransformer.kt

@@ -7,12 +7,12 @@ package org.jetbrains.kotlin.fir.resolve.transformers
 
 import org.jetbrains.kotlin.fir.*
 import org.jetbrains.kotlin.fir.declarations.FirResolvePhase
+import org.jetbrains.kotlin.fir.diagnostics.ConeSimpleDiagnostic
 import org.jetbrains.kotlin.fir.diagnostics.ConeUnexpectedTypeArgumentsError
 import org.jetbrains.kotlin.fir.resolve.typeResolver
 import org.jetbrains.kotlin.fir.scopes.FirScope
 import org.jetbrains.kotlin.fir.types.*
 import org.jetbrains.kotlin.fir.types.builder.buildErrorTypeRef
-import org.jetbrains.kotlin.fir.types.builder.buildResolvedFunctionTypeRef
 import org.jetbrains.kotlin.fir.types.builder.buildResolvedTypeRef
 import org.jetbrains.kotlin.fir.visitors.CompositeTransformResult
 import org.jetbrains.kotlin.fir.visitors.compose
@@ -45,15 +45,19 @@ class FirSpecificTypeResolverTransformer(
 
     override fun transformFunctionTypeRef(functionTypeRef: FirFunctionTypeRef, data: FirScope): CompositeTransformResult<FirTypeRef> {
         functionTypeRef.transformChildren(this, data)
-        return buildResolvedFunctionTypeRef {
-            source = functionTypeRef.source
-            type = typeResolver.resolveType(functionTypeRef, data, areBareTypesAllowed).takeIfAcceptable() ?: return functionTypeRef.compose()
-            isMarkedNullable = functionTypeRef.isMarkedNullable
-            isSuspend = functionTypeRef.isSuspend
-            receiverTypeRef = functionTypeRef.receiverTypeRef
-            returnTypeRef = functionTypeRef.returnTypeRef
-            annotations += functionTypeRef.annotations
-            valueParameters += functionTypeRef.valueParameters
+        val resolvedType = typeResolver.resolveType(functionTypeRef, data, areBareTypesAllowed).takeIfAcceptable()
+        return if (resolvedType != null && resolvedType !is ConeClassErrorType) {
+            buildResolvedTypeRef {
+                source = functionTypeRef.source
+                type = resolvedType
+                annotations += functionTypeRef.annotations
+            }
+        } else {
+            buildErrorTypeRef {
+                source = functionTypeRef.source
+                diagnostic = (resolvedType as? ConeClassErrorType)?.diagnostic
+                    ?: ConeSimpleDiagnostic("Unresolved functional type: ${functionTypeRef.render()}")
+            }
         }.compose()
     }
 

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/FirComposedSuperTypeRef.kt

@@ -5,7 +5,6 @@
 
 package org.jetbrains.kotlin.fir.types
 
-import org.jetbrains.kotlin.fir.FirPureAbstractElement
 import org.jetbrains.kotlin.fir.FirSourceElement
 import org.jetbrains.kotlin.fir.expressions.FirAnnotationCall
 import org.jetbrains.kotlin.fir.visitors.*
@@ -15,7 +14,7 @@ import org.jetbrains.kotlin.fir.visitors.*
  * DO NOT MODIFY IT MANUALLY
  */
 
-abstract class FirComposedSuperTypeRef : FirPureAbstractElement(), FirTypeRef {
+abstract class FirComposedSuperTypeRef : FirTypeRef() {
     abstract override val source: FirSourceElement?
     abstract override val annotations: List<FirAnnotationCall>
     abstract val superTypeRefs: List<FirResolvedTypeRef>

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/FirDynamicTypeRef.kt

@@ -5,7 +5,6 @@
 
 package org.jetbrains.kotlin.fir.types
 
-import org.jetbrains.kotlin.fir.FirPureAbstractElement
 import org.jetbrains.kotlin.fir.FirSourceElement
 import org.jetbrains.kotlin.fir.expressions.FirAnnotationCall
 import org.jetbrains.kotlin.fir.visitors.*
@@ -15,7 +14,7 @@ import org.jetbrains.kotlin.fir.visitors.*
  * DO NOT MODIFY IT MANUALLY
  */
 
-abstract class FirDynamicTypeRef : FirPureAbstractElement(), FirTypeRefWithNullability {
+abstract class FirDynamicTypeRef : FirTypeRefWithNullability() {
     abstract override val source: FirSourceElement?
     abstract override val annotations: List<FirAnnotationCall>
     abstract override val isMarkedNullable: Boolean

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/FirFunctionTypeRef.kt

@@ -15,16 +15,16 @@ import org.jetbrains.kotlin.fir.visitors.*
  * DO NOT MODIFY IT MANUALLY
  */
 
-interface FirFunctionTypeRef : FirTypeRefWithNullability {
-    override val source: FirSourceElement?
-    override val annotations: List<FirAnnotationCall>
-    override val isMarkedNullable: Boolean
-    val receiverTypeRef: FirTypeRef?
-    val valueParameters: List<FirValueParameter>
-    val returnTypeRef: FirTypeRef
-    val isSuspend: Boolean
+abstract class FirFunctionTypeRef : FirTypeRefWithNullability() {
+    abstract override val source: FirSourceElement?
+    abstract override val annotations: List<FirAnnotationCall>
+    abstract override val isMarkedNullable: Boolean
+    abstract val receiverTypeRef: FirTypeRef?
+    abstract val valueParameters: List<FirValueParameter>
+    abstract val returnTypeRef: FirTypeRef
+    abstract val isSuspend: Boolean
 
     override fun <R, D> accept(visitor: FirVisitor<R, D>, data: D): R = visitor.visitFunctionTypeRef(this, data)
 
-    override fun <D> transformAnnotations(transformer: FirTransformer<D>, data: D): FirFunctionTypeRef
+    abstract override fun <D> transformAnnotations(transformer: FirTransformer<D>, data: D): FirFunctionTypeRef
 }

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/FirImplicitTypeRef.kt

@@ -5,7 +5,6 @@
 
 package org.jetbrains.kotlin.fir.types
 
-import org.jetbrains.kotlin.fir.FirPureAbstractElement
 import org.jetbrains.kotlin.fir.FirSourceElement
 import org.jetbrains.kotlin.fir.expressions.FirAnnotationCall
 import org.jetbrains.kotlin.fir.visitors.*
@@ -15,7 +14,7 @@ import org.jetbrains.kotlin.fir.visitors.*
  * DO NOT MODIFY IT MANUALLY
  */
 
-abstract class FirImplicitTypeRef : FirPureAbstractElement(), FirTypeRef {
+abstract class FirImplicitTypeRef : FirTypeRef() {
     abstract override val source: FirSourceElement?
     abstract override val annotations: List<FirAnnotationCall>
 

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/FirResolvedFunctionTypeRef.kt

@@ -1,32 +0,0 @@
-/*
- * Copyright 2010-2020 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.fir.types
-
-import org.jetbrains.kotlin.fir.FirSourceElement
-import org.jetbrains.kotlin.fir.declarations.FirValueParameter
-import org.jetbrains.kotlin.fir.expressions.FirAnnotationCall
-import org.jetbrains.kotlin.fir.visitors.*
-
-/*
- * This file was generated automatically
- * DO NOT MODIFY IT MANUALLY
- */
-
-abstract class FirResolvedFunctionTypeRef : FirResolvedTypeRef(), FirFunctionTypeRef {
-    abstract override val source: FirSourceElement?
-    abstract override val annotations: List<FirAnnotationCall>
-    abstract override val type: ConeKotlinType
-    abstract override val delegatedTypeRef: FirTypeRef?
-    abstract override val isMarkedNullable: Boolean
-    abstract override val receiverTypeRef: FirTypeRef?
-    abstract override val valueParameters: List<FirValueParameter>
-    abstract override val returnTypeRef: FirTypeRef
-    abstract override val isSuspend: Boolean
-
-    override fun <R, D> accept(visitor: FirVisitor<R, D>, data: D): R = visitor.visitResolvedFunctionTypeRef(this, data)
-
-    abstract override fun <D> transformAnnotations(transformer: FirTransformer<D>, data: D): FirResolvedFunctionTypeRef
-}

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/FirResolvedTypeRef.kt

@@ -5,7 +5,6 @@
 
 package org.jetbrains.kotlin.fir.types
 
-import org.jetbrains.kotlin.fir.FirPureAbstractElement
 import org.jetbrains.kotlin.fir.FirSourceElement
 import org.jetbrains.kotlin.fir.expressions.FirAnnotationCall
 import org.jetbrains.kotlin.fir.visitors.*
@@ -15,7 +14,7 @@ import org.jetbrains.kotlin.fir.visitors.*
  * DO NOT MODIFY IT MANUALLY
  */
 
-abstract class FirResolvedTypeRef : FirPureAbstractElement(), FirTypeRef {
+abstract class FirResolvedTypeRef : FirTypeRef() {
     abstract override val source: FirSourceElement?
     abstract override val annotations: List<FirAnnotationCall>
     abstract val type: ConeKotlinType

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/FirTypeRef.kt

@@ -6,6 +6,7 @@
 package org.jetbrains.kotlin.fir.types
 
 import org.jetbrains.kotlin.fir.FirAnnotationContainer
+import org.jetbrains.kotlin.fir.FirPureAbstractElement
 import org.jetbrains.kotlin.fir.FirSourceElement
 import org.jetbrains.kotlin.fir.expressions.FirAnnotationCall
 import org.jetbrains.kotlin.fir.visitors.*
@@ -15,11 +16,11 @@ import org.jetbrains.kotlin.fir.visitors.*
  * DO NOT MODIFY IT MANUALLY
  */
 
-interface FirTypeRef : FirAnnotationContainer {
-    override val source: FirSourceElement?
-    override val annotations: List<FirAnnotationCall>
+abstract class FirTypeRef : FirPureAbstractElement(), FirAnnotationContainer {
+    abstract override val source: FirSourceElement?
+    abstract override val annotations: List<FirAnnotationCall>
 
     override fun <R, D> accept(visitor: FirVisitor<R, D>, data: D): R = visitor.visitTypeRef(this, data)
 
-    override fun <D> transformAnnotations(transformer: FirTransformer<D>, data: D): FirTypeRef
+    abstract override fun <D> transformAnnotations(transformer: FirTransformer<D>, data: D): FirTypeRef
 }

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/FirTypeRefWithNullability.kt

@@ -14,12 +14,12 @@ import org.jetbrains.kotlin.fir.visitors.*
  * DO NOT MODIFY IT MANUALLY
  */
 
-interface FirTypeRefWithNullability : FirTypeRef {
-    override val source: FirSourceElement?
-    override val annotations: List<FirAnnotationCall>
-    val isMarkedNullable: Boolean
+abstract class FirTypeRefWithNullability : FirTypeRef() {
+    abstract override val source: FirSourceElement?
+    abstract override val annotations: List<FirAnnotationCall>
+    abstract val isMarkedNullable: Boolean
 
     override fun <R, D> accept(visitor: FirVisitor<R, D>, data: D): R = visitor.visitTypeRefWithNullability(this, data)
 
-    override fun <D> transformAnnotations(transformer: FirTransformer<D>, data: D): FirTypeRefWithNullability
+    abstract override fun <D> transformAnnotations(transformer: FirTransformer<D>, data: D): FirTypeRefWithNullability
 }

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/FirUserTypeRef.kt

@@ -5,7 +5,6 @@
 
 package org.jetbrains.kotlin.fir.types
 
-import org.jetbrains.kotlin.fir.FirPureAbstractElement
 import org.jetbrains.kotlin.fir.FirSourceElement
 import org.jetbrains.kotlin.fir.expressions.FirAnnotationCall
 import org.jetbrains.kotlin.fir.visitors.*
@@ -15,7 +14,7 @@ import org.jetbrains.kotlin.fir.visitors.*
  * DO NOT MODIFY IT MANUALLY
  */
 
-abstract class FirUserTypeRef : FirPureAbstractElement(), FirTypeRefWithNullability {
+abstract class FirUserTypeRef : FirTypeRefWithNullability() {
     abstract override val source: FirSourceElement?
     abstract override val annotations: List<FirAnnotationCall>
     abstract override val isMarkedNullable: Boolean

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/builder/FirFunctionTypeRefBuilder.kt

@@ -6,7 +6,6 @@
 package org.jetbrains.kotlin.fir.types.builder
 
 import kotlin.contracts.*
-import org.jetbrains.kotlin.fir.FirPureAbstractElement
 import org.jetbrains.kotlin.fir.FirSourceElement
 import org.jetbrains.kotlin.fir.builder.FirAnnotationContainerBuilder
 import org.jetbrains.kotlin.fir.builder.FirBuilderDsl

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/builder/FirResolvedFunctionTypeRefBuilder.kt

@@ -1,74 +0,0 @@
-/*
- * Copyright 2010-2020 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.fir.types.builder
-
-import kotlin.contracts.*
-import org.jetbrains.kotlin.fir.FirSourceElement
-import org.jetbrains.kotlin.fir.builder.FirAnnotationContainerBuilder
-import org.jetbrains.kotlin.fir.builder.FirBuilderDsl
-import org.jetbrains.kotlin.fir.declarations.FirValueParameter
-import org.jetbrains.kotlin.fir.expressions.FirAnnotationCall
-import org.jetbrains.kotlin.fir.types.ConeKotlinType
-import org.jetbrains.kotlin.fir.types.FirResolvedFunctionTypeRef
-import org.jetbrains.kotlin.fir.types.FirTypeRef
-import org.jetbrains.kotlin.fir.types.impl.FirResolvedFunctionTypeRefImpl
-import org.jetbrains.kotlin.fir.visitors.*
-
-/*
- * This file was generated automatically
- * DO NOT MODIFY IT MANUALLY
- */
-
-@FirBuilderDsl
-class FirResolvedFunctionTypeRefBuilder : FirAnnotationContainerBuilder {
-    override var source: FirSourceElement? = null
-    override val annotations: MutableList<FirAnnotationCall> = mutableListOf()
-    lateinit var type: ConeKotlinType
-    var isMarkedNullable: Boolean by kotlin.properties.Delegates.notNull<Boolean>()
-    var receiverTypeRef: FirTypeRef? = null
-    val valueParameters: MutableList<FirValueParameter> = mutableListOf()
-    lateinit var returnTypeRef: FirTypeRef
-    var isSuspend: Boolean by kotlin.properties.Delegates.notNull<Boolean>()
-
-    override fun build(): FirResolvedFunctionTypeRef {
-        return FirResolvedFunctionTypeRefImpl(
-            source,
-            annotations,
-            type,
-            isMarkedNullable,
-            receiverTypeRef,
-            valueParameters,
-            returnTypeRef,
-            isSuspend,
-        )
-    }
-
-}
-
-@OptIn(ExperimentalContracts::class)
-inline fun buildResolvedFunctionTypeRef(init: FirResolvedFunctionTypeRefBuilder.() -> Unit): FirResolvedFunctionTypeRef {
-    contract {
-        callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)
-    }
-    return FirResolvedFunctionTypeRefBuilder().apply(init).build()
-}
-
-@OptIn(ExperimentalContracts::class)
-inline fun buildResolvedFunctionTypeRefCopy(original: FirResolvedFunctionTypeRef, init: FirResolvedFunctionTypeRefBuilder.() -> Unit): FirResolvedFunctionTypeRef {
-    contract {
-        callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)
-    }
-    val copyBuilder = FirResolvedFunctionTypeRefBuilder()
-    copyBuilder.source = original.source
-    copyBuilder.annotations.addAll(original.annotations)
-    copyBuilder.type = original.type
-    copyBuilder.isMarkedNullable = original.isMarkedNullable
-    copyBuilder.receiverTypeRef = original.receiverTypeRef
-    copyBuilder.valueParameters.addAll(original.valueParameters)
-    copyBuilder.returnTypeRef = original.returnTypeRef
-    copyBuilder.isSuspend = original.isSuspend
-    return copyBuilder.apply(init).build()
-}

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/impl/FirFunctionTypeRefImpl.kt

@@ -5,7 +5,6 @@
 
 package org.jetbrains.kotlin.fir.types.impl
 
-import org.jetbrains.kotlin.fir.FirPureAbstractElement
 import org.jetbrains.kotlin.fir.FirSourceElement
 import org.jetbrains.kotlin.fir.declarations.FirValueParameter
 import org.jetbrains.kotlin.fir.expressions.FirAnnotationCall
@@ -26,7 +25,7 @@ internal class FirFunctionTypeRefImpl(
     override val valueParameters: MutableList<FirValueParameter>,
     override var returnTypeRef: FirTypeRef,
     override val isSuspend: Boolean,
-) : FirPureAbstractElement(), FirFunctionTypeRef {
+) : FirFunctionTypeRef() {
     override fun <R, D> acceptChildren(visitor: FirVisitor<R, D>, data: D) {
         annotations.forEach { it.accept(visitor, data) }
         receiverTypeRef?.accept(visitor, data)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/impl/FirResolvedFunctionTypeRefImpl.kt

@@ -1,52 +0,0 @@
-/*
- * Copyright 2010-2020 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.fir.types.impl
-
-import org.jetbrains.kotlin.fir.FirSourceElement
-import org.jetbrains.kotlin.fir.declarations.FirValueParameter
-import org.jetbrains.kotlin.fir.expressions.FirAnnotationCall
-import org.jetbrains.kotlin.fir.types.ConeKotlinType
-import org.jetbrains.kotlin.fir.types.FirResolvedFunctionTypeRef
-import org.jetbrains.kotlin.fir.types.FirTypeRef
-import org.jetbrains.kotlin.fir.visitors.*
-
-/*
- * This file was generated automatically
- * DO NOT MODIFY IT MANUALLY
- */
-
-internal class FirResolvedFunctionTypeRefImpl(
-    override val source: FirSourceElement?,
-    override val annotations: MutableList<FirAnnotationCall>,
-    override val type: ConeKotlinType,
-    override val isMarkedNullable: Boolean,
-    override var receiverTypeRef: FirTypeRef?,
-    override val valueParameters: MutableList<FirValueParameter>,
-    override var returnTypeRef: FirTypeRef,
-    override val isSuspend: Boolean,
-) : FirResolvedFunctionTypeRef() {
-    override val delegatedTypeRef: FirTypeRef? get() = null
-
-    override fun <R, D> acceptChildren(visitor: FirVisitor<R, D>, data: D) {
-        annotations.forEach { it.accept(visitor, data) }
-        receiverTypeRef?.accept(visitor, data)
-        valueParameters.forEach { it.accept(visitor, data) }
-        returnTypeRef.accept(visitor, data)
-    }
-
-    override fun <D> transformChildren(transformer: FirTransformer<D>, data: D): FirResolvedFunctionTypeRefImpl {
-        transformAnnotations(transformer, data)
-        receiverTypeRef = receiverTypeRef?.transformSingle(transformer, data)
-        valueParameters.transformInplace(transformer, data)
-        returnTypeRef = returnTypeRef.transformSingle(transformer, data)
-        return this
-    }
-
-    override fun <D> transformAnnotations(transformer: FirTransformer<D>, data: D): FirResolvedFunctionTypeRefImpl {
-        annotations.transformInplace(transformer, data)
-        return this
-    }
-}

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/visitors/FirTransformer.kt

@@ -123,7 +123,6 @@ import org.jetbrains.kotlin.fir.types.FirTypeRefWithNullability
 import org.jetbrains.kotlin.fir.types.FirUserTypeRef
 import org.jetbrains.kotlin.fir.types.FirDynamicTypeRef
 import org.jetbrains.kotlin.fir.types.FirFunctionTypeRef
-import org.jetbrains.kotlin.fir.types.FirResolvedFunctionTypeRef
 import org.jetbrains.kotlin.fir.types.FirImplicitTypeRef
 import org.jetbrains.kotlin.fir.types.FirComposedSuperTypeRef
 import org.jetbrains.kotlin.fir.contracts.FirEffectDeclaration
@@ -610,10 +609,6 @@ abstract class FirTransformer<in D> : FirVisitor<CompositeTransformResult<FirEle
         return transformElement(functionTypeRef, data)
     }
 
-    open fun transformResolvedFunctionTypeRef(resolvedFunctionTypeRef: FirResolvedFunctionTypeRef, data: D): CompositeTransformResult<FirTypeRef> {
-        return transformElement(resolvedFunctionTypeRef, data)
-    }
-
     open fun transformImplicitTypeRef(implicitTypeRef: FirImplicitTypeRef, data: D): CompositeTransformResult<FirTypeRef> {
         return transformElement(implicitTypeRef, data)
     }
@@ -1114,10 +1109,6 @@ abstract class FirTransformer<in D> : FirVisitor<CompositeTransformResult<FirEle
         return transformFunctionTypeRef(functionTypeRef, data)
     }
 
-    final override fun visitResolvedFunctionTypeRef(resolvedFunctionTypeRef: FirResolvedFunctionTypeRef, data: D): CompositeTransformResult<FirTypeRef> {
-        return transformResolvedFunctionTypeRef(resolvedFunctionTypeRef, data)
-    }
-
     final override fun visitImplicitTypeRef(implicitTypeRef: FirImplicitTypeRef, data: D): CompositeTransformResult<FirTypeRef> {
         return transformImplicitTypeRef(implicitTypeRef, data)
     }

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/visitors/FirVisitor.kt

@@ -123,7 +123,6 @@ import org.jetbrains.kotlin.fir.types.FirTypeRefWithNullability
 import org.jetbrains.kotlin.fir.types.FirUserTypeRef
 import org.jetbrains.kotlin.fir.types.FirDynamicTypeRef
 import org.jetbrains.kotlin.fir.types.FirFunctionTypeRef
-import org.jetbrains.kotlin.fir.types.FirResolvedFunctionTypeRef
 import org.jetbrains.kotlin.fir.types.FirImplicitTypeRef
 import org.jetbrains.kotlin.fir.types.FirComposedSuperTypeRef
 import org.jetbrains.kotlin.fir.contracts.FirEffectDeclaration
@@ -374,8 +373,6 @@ abstract class FirVisitor<out R, in D> {
 
     open fun visitFunctionTypeRef(functionTypeRef: FirFunctionTypeRef, data: D): R  = visitElement(functionTypeRef, data)
 
-    open fun visitResolvedFunctionTypeRef(resolvedFunctionTypeRef: FirResolvedFunctionTypeRef, data: D): R  = visitElement(resolvedFunctionTypeRef, data)
-
     open fun visitImplicitTypeRef(implicitTypeRef: FirImplicitTypeRef, data: D): R  = visitElement(implicitTypeRef, data)
 
     open fun visitComposedSuperTypeRef(composedSuperTypeRef: FirComposedSuperTypeRef, data: D): R  = visitElement(composedSuperTypeRef, data)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/visitors/FirVisitorVoid.kt

@@ -123,7 +123,6 @@ import org.jetbrains.kotlin.fir.types.FirTypeRefWithNullability
 import org.jetbrains.kotlin.fir.types.FirUserTypeRef
 import org.jetbrains.kotlin.fir.types.FirDynamicTypeRef
 import org.jetbrains.kotlin.fir.types.FirFunctionTypeRef
-import org.jetbrains.kotlin.fir.types.FirResolvedFunctionTypeRef
 import org.jetbrains.kotlin.fir.types.FirImplicitTypeRef
 import org.jetbrains.kotlin.fir.types.FirComposedSuperTypeRef
 import org.jetbrains.kotlin.fir.contracts.FirEffectDeclaration
@@ -608,10 +607,6 @@ abstract class FirVisitorVoid : FirVisitor<Unit, Nothing?>() {
         visitElement(functionTypeRef)
     }
 
-    open fun visitResolvedFunctionTypeRef(resolvedFunctionTypeRef: FirResolvedFunctionTypeRef) {
-        visitElement(resolvedFunctionTypeRef)
-    }
-
     open fun visitImplicitTypeRef(implicitTypeRef: FirImplicitTypeRef) {
         visitElement(implicitTypeRef)
     }
@@ -1112,10 +1107,6 @@ abstract class FirVisitorVoid : FirVisitor<Unit, Nothing?>() {
         visitFunctionTypeRef(functionTypeRef)
     }
 
-    final override fun visitResolvedFunctionTypeRef(resolvedFunctionTypeRef: FirResolvedFunctionTypeRef, data: Nothing?) {
-        visitResolvedFunctionTypeRef(resolvedFunctionTypeRef)
-    }
-
     final override fun visitImplicitTypeRef(implicitTypeRef: FirImplicitTypeRef, data: Nothing?) {
         visitImplicitTypeRef(implicitTypeRef)
     }

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

@@ -39,9 +39,6 @@ fun <R : FirTypeRef> R.copyWithNewSourceKind(newKind: FirFakeSourceElementKind):
             qualifier += typeRef.qualifier
             annotations += typeRef.annotations
         }
-        is FirResolvedFunctionTypeRef -> buildResolvedFunctionTypeRefCopy(typeRef) {
-            source = newSource
-        }
         is FirImplicitTypeRef -> buildImplicitTypeRefCopy(typeRef) {
             source = newSource
         }

compiler/fir/tree/src/org/jetbrains/kotlin/fir/visitors/FirDefaultTransformer.kt

@@ -24,10 +24,6 @@ abstract class FirDefaultTransformer<D> : FirTransformer<D>() {
         return transformResolvedTypeRef(errorTypeRef, data)
     }
 
-    override fun transformResolvedFunctionTypeRef(resolvedFunctionTypeRef: FirResolvedFunctionTypeRef, data: D): CompositeTransformResult<FirTypeRef> {
-        return transformResolvedTypeRef(resolvedFunctionTypeRef, data)
-    }
-
     override fun transformTypeRefWithNullability(typeRefWithNullability: FirTypeRefWithNullability, data: D): CompositeTransformResult<FirTypeRef> {
         return transformTypeRef(typeRefWithNullability, data)
     }

compiler/fir/tree/src/org/jetbrains/kotlin/fir/visitors/FirDefaultVisitor.kt

@@ -23,10 +23,6 @@ abstract class FirDefaultVisitor<R, D> : FirVisitor<R, D>() {
         return visitResolvedTypeRef(errorTypeRef, data)
     }
 
-    override fun visitResolvedFunctionTypeRef(resolvedFunctionTypeRef: FirResolvedFunctionTypeRef, data: D): R {
-        return visitResolvedTypeRef(resolvedFunctionTypeRef, data)
-    }
-
     override fun visitTypeRefWithNullability(typeRefWithNullability: FirTypeRefWithNullability, data: D): R {
         return visitTypeRef(typeRefWithNullability, data)
     }

compiler/fir/tree/src/org/jetbrains/kotlin/fir/visitors/FirDefaultVisitorVoid.kt

@@ -23,10 +23,6 @@ abstract class FirDefaultVisitorVoid : FirVisitorVoid() {
         return visitResolvedTypeRef(errorTypeRef)
     }
 
-    override fun visitResolvedFunctionTypeRef(resolvedFunctionTypeRef: FirResolvedFunctionTypeRef) {
-        return visitResolvedTypeRef(resolvedFunctionTypeRef)
-    }
-
     override fun visitTypeRefWithNullability(typeRefWithNullability: FirTypeRefWithNullability) {
         return visitTypeRef(typeRefWithNullability)
     }

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

@@ -228,10 +228,6 @@ object BuilderConfigurator : AbstractBuilderConfigurator<FirTreeBuilder>(FirTree
             withCopy()
         }
 
-        builder(resolvedFunctionTypeRef) {
-            withCopy()
-        }
-
         builder(implicitTypeRef) {
             withCopy()
         }

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

@@ -146,7 +146,6 @@ object FirTreeBuilder : AbstractFirTreeBuilder() {
     val userTypeRef = element("UserTypeRef", TypeRef, typeRefWithNullability)
     val dynamicTypeRef = element("DynamicTypeRef", TypeRef, typeRefWithNullability)
     val functionTypeRef = element("FunctionTypeRef", TypeRef, typeRefWithNullability)
-    val resolvedFunctionTypeRef = element("ResolvedFunctionTypeRef", TypeRef, resolvedTypeRef, functionTypeRef)
     val implicitTypeRef = element("ImplicitTypeRef", TypeRef, typeRef)
     val composedSuperTypeRef = element("ComposedSuperTypeRef", TypeRef, typeRef)
 

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

@@ -370,13 +370,6 @@ object ImplementationConfigurator : AbstractFirTreeImplementationConfigurator()
             useTypes(errorTypeRefImpl, coneStubDiagnosticType)
         }
 
-        impl(resolvedFunctionTypeRef) {
-            default("delegatedTypeRef") {
-                value = "null"
-                withGetter = true
-            }
-        }
-
         impl(errorFunction) {
             defaultNull("receiverTypeRef", "body", withGetter = true)
             default("returnTypeRef", "FirErrorTypeRefImpl(null, diagnostic)")

compiler/visualizer/render-fir/src/org/jetbrains/kotlin/compiler/visualizer/FirVisualizer.kt

@@ -489,16 +489,6 @@ class FirVisualizer(private val firFile: FirFile) : BaseRenderer() {
             data.append("[ERROR : ${errorTypeRef.diagnostic.reason}]")
         }
 
-        override fun visitResolvedFunctionTypeRef(resolvedFunctionTypeRef: FirResolvedFunctionTypeRef, data: StringBuilder) {
-            resolvedFunctionTypeRef.receiverTypeRef?.let {
-                it.accept(this, data)
-                data.append(".")
-            }
-            visitValueParameters(resolvedFunctionTypeRef.valueParameters, data)
-            data.append(" -> ")
-            resolvedFunctionTypeRef.returnTypeRef.accept(this, data)
-        }
-
         override fun visitTypeRefWithNullability(typeRefWithNullability: FirTypeRefWithNullability, data: StringBuilder) {
             if (typeRefWithNullability.isMarkedNullable) {
                 data.append("?")