FIR IDE: Make KtReference class descriptors frontend independent

* The new idea-frontend-independent module created
* Moved KtReference and it inheritors to that module & implement them in idea-analysis module by using descriptors frontend

compiler/frontend.common/src/org/jetbrains/kotlin/resolve/ArrayFqNames.kt

@@ -0,0 +1,24 @@
+/*
+ * 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.resolve
+
+import org.jetbrains.kotlin.builtins.PrimitiveType
+import org.jetbrains.kotlin.name.Name
+
+object ArrayFqNames {
+    val PRIMITIVE_TYPE_TO_ARRAY: Map<PrimitiveType, Name> = hashMapOf(
+        PrimitiveType.BOOLEAN to Name.identifier("booleanArrayOf"),
+        PrimitiveType.CHAR to Name.identifier("charArrayOf"),
+        PrimitiveType.INT to Name.identifier("intArrayOf"),
+        PrimitiveType.BYTE to Name.identifier("byteArrayOf"),
+        PrimitiveType.SHORT to Name.identifier("shortArrayOf"),
+        PrimitiveType.FLOAT to Name.identifier("floatArrayOf"),
+        PrimitiveType.LONG to Name.identifier("longArrayOf"),
+        PrimitiveType.DOUBLE to Name.identifier("doubleArrayOf")
+    )
+
+    val ARRAY_OF_FUNCTION = Name.identifier("arrayOf")
+}

compiler/frontend/src/org/jetbrains/kotlin/resolve/CollectionLiteralResolver.kt

@@ -1,17 +1,6 @@
 /*
- * Copyright 2010-2017 JetBrains s.r.o.
+ * 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.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
  */
 
 package org.jetbrains.kotlin.resolve
@@ -44,21 +33,6 @@ class CollectionLiteralResolver(
     val callResolver: CallResolver,
     val languageVersionSettings: LanguageVersionSettings
 ) {
-    companion object {
-        val PRIMITIVE_TYPE_TO_ARRAY: Map<PrimitiveType, Name> = hashMapOf(
-            PrimitiveType.BOOLEAN to Name.identifier("booleanArrayOf"),
-            PrimitiveType.CHAR to Name.identifier("charArrayOf"),
-            PrimitiveType.INT to Name.identifier("intArrayOf"),
-            PrimitiveType.BYTE to Name.identifier("byteArrayOf"),
-            PrimitiveType.SHORT to Name.identifier("shortArrayOf"),
-            PrimitiveType.FLOAT to Name.identifier("floatArrayOf"),
-            PrimitiveType.LONG to Name.identifier("longArrayOf"),
-            PrimitiveType.DOUBLE to Name.identifier("doubleArrayOf")
-        )
-
-        val ARRAY_OF_FUNCTION = Name.identifier("arrayOf")
-    }
-
     fun resolveCollectionLiteral(
         collectionLiteralExpression: KtCollectionLiteralExpression,
         context: ExpressionTypingContext
@@ -120,11 +94,11 @@ class CollectionLiteralResolver(
 
     private fun getArrayFunctionCallName(expectedType: KotlinType): Name {
         if (NO_EXPECTED_TYPE === expectedType || !KotlinBuiltIns.isPrimitiveArray(expectedType)) {
-            return ARRAY_OF_FUNCTION
+            return ArrayFqNames.ARRAY_OF_FUNCTION
         }
 
-        val descriptor = expectedType.constructor.declarationDescriptor ?: return ARRAY_OF_FUNCTION
+        val descriptor = expectedType.constructor.declarationDescriptor ?: return ArrayFqNames.ARRAY_OF_FUNCTION
 
-        return PRIMITIVE_TYPE_TO_ARRAY[KotlinBuiltIns.getPrimitiveArrayType(descriptor)] ?: ARRAY_OF_FUNCTION
+        return ArrayFqNames.PRIMITIVE_TYPE_TO_ARRAY[KotlinBuiltIns.getPrimitiveArrayType(descriptor)] ?: ArrayFqNames.ARRAY_OF_FUNCTION
     }
 }

core/util.runtime/src/org/jetbrains/kotlin/utils/addToStdlib.kt

@@ -1,17 +1,6 @@
 /*
- * Copyright 2010-2015 JetBrains s.r.o.
+ * 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.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
  */
 
 package org.jetbrains.kotlin.utils.addToStdlib
@@ -50,6 +39,17 @@ inline fun <reified T> Array<*>.firstIsInstance(): T {
     throw NoSuchElementException("No element of given type found")
 }
 
+inline fun <reified T> Iterable<*>.filterIsInstanceWithChecker(additionalChecker: (T) -> Boolean): List<T> {
+    val result = arrayListOf<T>()
+    for (element in this) {
+        if (element is T && additionalChecker(element)) {
+            result += element
+        }
+    }
+    return result
+}
+
+
 inline fun <reified T : Any> Iterable<*>.lastIsInstanceOrNull(): T? {
     when (this) {
         is List<*> -> {

idea/idea-analysis/src/org/jetbrains/kotlin/idea/kdoc/KDocReference.kt

@@ -1,17 +1,6 @@
 /*
- * Copyright 2010-2016 JetBrains s.r.o.
+ * 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.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
  */
 
 package org.jetbrains.kotlin.idea.kdoc
@@ -20,6 +9,7 @@ import com.intellij.openapi.util.TextRange
 import com.intellij.psi.PsiElement
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 import org.jetbrains.kotlin.idea.caches.resolve.getResolutionFacade
+import org.jetbrains.kotlin.idea.references.KtDescriptorsBasedReference
 import org.jetbrains.kotlin.idea.references.KtMultiReference
 import org.jetbrains.kotlin.kdoc.psi.impl.KDocLink
 import org.jetbrains.kotlin.kdoc.psi.impl.KDocName
@@ -28,7 +18,11 @@ import org.jetbrains.kotlin.psi.psiUtil.getStrictParentOfType
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
 
-class KDocReference(element: KDocName) : KtMultiReference<KDocName>(element) {
+//TODO move to frontend-independent module
+class KDocReference(element: KDocName) : KtMultiReference<KDocName>(element), KtDescriptorsBasedReference {
+    override fun isReferenceTo(element: PsiElement): Boolean =
+        super<KtDescriptorsBasedReference>.isReferenceTo(element)
+
     override fun getTargetDescriptors(context: BindingContext): Collection<DeclarationDescriptor> {
         val declaration = element.getContainingDoc().getOwner() ?: return arrayListOf()
         val resolutionFacade = element.getResolutionFacade()

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/FirReferenceResolveHelper.kt

@@ -0,0 +1,164 @@
+/*
+ * 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.idea.references
+
+import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.fir.FirSession
+import org.jetbrains.kotlin.fir.declarations.*
+import org.jetbrains.kotlin.fir.expressions.*
+import org.jetbrains.kotlin.fir.psi
+import org.jetbrains.kotlin.fir.references.*
+import org.jetbrains.kotlin.fir.resolve.firSymbolProvider
+import org.jetbrains.kotlin.fir.resolve.toSymbol
+import org.jetbrains.kotlin.fir.symbols.AbstractFirBasedSymbol
+import org.jetbrains.kotlin.fir.symbols.impl.ConeClassLikeLookupTagImpl
+import org.jetbrains.kotlin.fir.types.ConeLookupTagBasedType
+import org.jetbrains.kotlin.fir.types.FirResolvedTypeRef
+import org.jetbrains.kotlin.idea.fir.firResolveState
+import org.jetbrains.kotlin.idea.fir.getOrBuildFir
+import org.jetbrains.kotlin.name.ClassId
+import org.jetbrains.kotlin.psi.KtDotQualifiedExpression
+import org.jetbrains.kotlin.psi.KtElement
+import org.jetbrains.kotlin.psi.KtPackageDirective
+import org.jetbrains.kotlin.psi.psiUtil.getNonStrictParentOfType
+
+object FirReferenceResolveHelper {
+    fun FirResolvedTypeRef.toTargetPsi(session: FirSession): PsiElement? {
+        val type = type as? ConeLookupTagBasedType ?: return null
+        return (type.lookupTag.toSymbol(session) as? AbstractFirBasedSymbol<*>)?.fir?.psi
+    }
+
+    fun ClassId.toTargetPsi(session: FirSession, calleeReference: FirReference? = null): PsiElement? {
+        val classLikeDeclaration = ConeClassLikeLookupTagImpl(this).toSymbol(session)?.fir
+        if (classLikeDeclaration is FirRegularClass) {
+            if (calleeReference is FirResolvedNamedReference) {
+                val callee = calleeReference.resolvedSymbol.fir as? FirCallableMemberDeclaration
+                // TODO: check callee owner directly?
+                if (callee !is FirConstructor && callee?.isStatic != true) {
+                    classLikeDeclaration.companionObject?.let { return it.psi }
+                }
+            }
+        }
+        return classLikeDeclaration?.psi
+    }
+
+    fun FirReference.toTargetPsi(session: FirSession): PsiElement? {
+        return when (this) {
+            is FirResolvedNamedReference -> {
+                resolvedSymbol.fir.psi
+            }
+            is FirResolvedCallableReference -> {
+                resolvedSymbol.fir.psi
+            }
+            is FirThisReference -> {
+                boundSymbol?.fir?.psi
+            }
+            is FirSuperReference -> {
+                (superTypeRef as? FirResolvedTypeRef)?.toTargetPsi(session)
+            }
+            else -> {
+                null
+            }
+        }
+    }
+
+    fun resolveToPsiElements(ref: AbstractKtReference<KtElement>): Collection<PsiElement> {
+        val expression = ref.expression
+        val state = expression.firResolveState()
+        val session = state.getSession(expression)
+        when (val fir = expression.getOrBuildFir(state)) {
+            is FirResolvable -> {
+                return listOfNotNull(fir.calleeReference.toTargetPsi(session))
+            }
+            is FirResolvedTypeRef -> {
+                return listOfNotNull(fir.toTargetPsi(session))
+            }
+            is FirResolvedQualifier -> {
+                val classId = fir.classId ?: return emptyList()
+                // Distinguish A.foo() from A(.Companion).foo()
+                // Make expression.parent as? KtDotQualifiedExpression local function
+                var parent = expression.parent as? KtDotQualifiedExpression
+                while (parent != null) {
+                    val selectorExpression = parent.selectorExpression ?: break
+                    if (selectorExpression === expression) {
+                        parent = parent.parent as? KtDotQualifiedExpression
+                        continue
+                    }
+                    val parentFir = selectorExpression.getOrBuildFir(state)
+                    if (parentFir is FirQualifiedAccess) {
+                        return listOfNotNull(classId.toTargetPsi(session, parentFir.calleeReference))
+                    }
+                    parent = parent.parent as? KtDotQualifiedExpression
+                }
+                return listOfNotNull(classId.toTargetPsi(session))
+            }
+            is FirAnnotationCall -> {
+                val type = fir.typeRef as? FirResolvedTypeRef ?: return emptyList()
+                return listOfNotNull(type.toTargetPsi(session))
+            }
+            is FirResolvedImport -> {
+                var parent = expression.parent
+                while (parent is KtDotQualifiedExpression) {
+                    if (parent.selectorExpression !== expression) {
+                        // Special: package reference in the middle of import directive
+                        // import a.<caret>b.c.SomeClass
+                        // TODO: return reference to PsiPackage
+                        return listOf(expression)
+                    }
+                    parent = parent.parent
+                }
+                val classId = fir.resolvedClassId
+                if (classId != null) {
+                    return listOfNotNull(classId.toTargetPsi(session))
+                }
+                val name = fir.importedName ?: return emptyList()
+                val symbolProvider = session.firSymbolProvider
+                return symbolProvider.getTopLevelCallableSymbols(fir.packageFqName, name).mapNotNull { it.fir.psi } +
+                        listOfNotNull(symbolProvider.getClassLikeSymbolByFqName(ClassId(fir.packageFqName, name))?.fir?.psi)
+            }
+            is FirFile -> {
+                if (expression.getNonStrictParentOfType<KtPackageDirective>() != null) {
+                    // Special: package reference in the middle of package directive
+                    return listOf(expression)
+                }
+                return listOfNotNull(fir.psi)
+            }
+            is FirArrayOfCall -> {
+                // We can't yet find PsiElement for arrayOf, intArrayOf, etc.
+                return emptyList()
+            }
+            is FirErrorNamedReference -> {
+                return emptyList()
+            }
+            else -> {
+                // Handle situation when we're in the middle/beginning of qualifier
+                // <caret>A.B.C.foo() or A.<caret>B.C.foo()
+                // NB: in this case we get some parent FIR, like FirBlock, FirProperty, FirFunction or the like
+                var parent = expression.parent as? KtDotQualifiedExpression
+                var unresolvedCounter = 1
+                while (parent != null) {
+                    val selectorExpression = parent.selectorExpression ?: break
+                    if (selectorExpression === expression) {
+                        parent = parent.parent as? KtDotQualifiedExpression
+                        continue
+                    }
+                    val parentFir = selectorExpression.getOrBuildFir(state)
+                    if (parentFir is FirResolvedQualifier) {
+                        var classId = parentFir.classId
+                        while (unresolvedCounter > 0) {
+                            unresolvedCounter--
+                            classId = classId?.outerClassId
+                        }
+                        return listOfNotNull(classId?.toTargetPsi(session))
+                    }
+                    parent = parent.parent as? KtDotQualifiedExpression
+                    unresolvedCounter++
+                }
+                return emptyList()
+            }
+        }
+    }
+}

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/KotlinDefaultAnnotationMethodImplicitReferenceContributor.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -66,14 +66,10 @@ class ReferenceImpl(private val argument: KtValueArgument) : PsiReference {
     override fun isSoft() = false
 }
 
-internal class KotlinDefaultAnnotationMethodImplicitReferenceContributor : KotlinReferenceProviderContributor {
+internal val KotlinDefaultAnnotationMethodImplicitReferenceProvider = provider@{ element: KtValueArgument ->
-    override fun registerReferenceProviders(registrar: KotlinPsiReferenceRegistrar) {
+    if (element.isNamed()) return@provider null
-        registrar.registerProvider<KtValueArgument> {
+    val annotationEntry = element.getParentOfTypeAndBranch<KtAnnotationEntry> { valueArgumentList } ?: return@provider null
-            if (it.isNamed()) return@registerProvider null
+    if (annotationEntry.valueArguments.size != 1) return@provider null
-            val annotationEntry = it.getParentOfTypeAndBranch<KtAnnotationEntry> { valueArgumentList } ?: return@registerProvider null
-            if (annotationEntry.valueArguments.size != 1) return@registerProvider null
 
-            ReferenceImpl(it)
+    ReferenceImpl(element)
-        }
-    }
 }

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/KotlinReferenceContributor.kt

@@ -1,17 +1,6 @@
 /*
- * Copyright 2010-2017 JetBrains s.r.o.
+ * 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.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
  */
 
 package org.jetbrains.kotlin.idea.references
@@ -24,10 +13,10 @@ import org.jetbrains.kotlin.psi.KtPackageDirective
 import org.jetbrains.kotlin.psi.KtUserType
 import org.jetbrains.kotlin.psi.psiUtil.parents
 
-internal class KotlinReferenceContributor : KotlinReferenceProviderContributor {
+class KotlinReferenceContributor : KotlinReferenceProviderContributor {
     override fun registerReferenceProviders(registrar: KotlinPsiReferenceRegistrar) {
         with(registrar) {
-            registerProvider(factory = ::KtSimpleNameReference)
+            registerProvider(factory = ::KtSimpleNameReferenceDescriptorsImpl)
 
             registerMultiProvider<KtNameReferenceExpression> { nameReferenceExpression ->
                 if (nameReferenceExpression.getReferencedNameElementType() != KtTokens.IDENTIFIER) return@registerMultiProvider emptyArray()
@@ -37,32 +26,34 @@ internal class KotlinReferenceContributor : KotlinReferenceProviderContributor {
 
                 when (nameReferenceExpression.readWriteAccess(useResolveForReadWrite = false)) {
                     ReferenceAccess.READ ->
-                        arrayOf(SyntheticPropertyAccessorReference.Getter(nameReferenceExpression))
+                        arrayOf(SyntheticPropertyAccessorReferenceDescriptorImpl(nameReferenceExpression, getter = true))
                     ReferenceAccess.WRITE ->
-                        arrayOf(SyntheticPropertyAccessorReference.Setter(nameReferenceExpression))
+                        arrayOf(SyntheticPropertyAccessorReferenceDescriptorImpl(nameReferenceExpression, getter = false))
                     ReferenceAccess.READ_WRITE ->
                         arrayOf(
-                            SyntheticPropertyAccessorReference.Getter(nameReferenceExpression),
+                            SyntheticPropertyAccessorReferenceDescriptorImpl(nameReferenceExpression, getter = true),
-                            SyntheticPropertyAccessorReference.Setter(nameReferenceExpression)
+                            SyntheticPropertyAccessorReferenceDescriptorImpl(nameReferenceExpression, getter = false)
                         )
                 }
             }
 
-            registerProvider(factory = ::KtConstructorDelegationReference)
+            registerProvider(factory = ::KtConstructorDelegationReferenceDescriptorsImpl)
 
-            registerProvider(factory = ::KtInvokeFunctionReference)
+            registerProvider(factory = ::KtInvokeFunctionReferenceDescriptorsImpl)
 
-            registerProvider(factory = ::KtArrayAccessReference)
+            registerProvider(factory = ::KtArrayAccessReferenceDescriptorsImpl)
 
-            registerProvider(factory = ::KtCollectionLiteralReference)
+            registerProvider(factory = ::KtCollectionLiteralReferenceDescriptorsImpl)
 
-            registerProvider(factory = ::KtForLoopInReference)
+            registerProvider(factory = ::KtForLoopInReferenceDescriptorsImpl)
 
-            registerProvider(factory = ::KtPropertyDelegationMethodsReference)
+            registerProvider(factory = ::KtPropertyDelegationMethodsReferenceDescriptorsImpl)
 
-            registerProvider(factory = ::KtDestructuringDeclarationReference)
+            registerProvider(factory = ::KtDestructuringDeclarationReferenceDescriptorsImpl)
 
             registerProvider(factory = ::KDocReference)
+
+            registerProvider(KotlinDefaultAnnotationMethodImplicitReferenceProvider)
         }
     }
 }

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/KtArrayAccessReferenceDescriptorsImpl.kt

@@ -0,0 +1,41 @@
+/*
+ * 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.idea.references
+
+import com.intellij.psi.MultiRangeReference
+import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+import org.jetbrains.kotlin.idea.core.canMoveLambdaOutsideParentheses
+import org.jetbrains.kotlin.idea.core.moveFunctionLiteralOutsideParentheses
+import org.jetbrains.kotlin.psi.KtArrayAccessExpression
+import org.jetbrains.kotlin.psi.KtCallExpression
+import org.jetbrains.kotlin.psi.KtExpression
+import org.jetbrains.kotlin.resolve.BindingContext
+import org.jetbrains.kotlin.resolve.BindingContext.INDEXED_LVALUE_GET
+import org.jetbrains.kotlin.resolve.BindingContext.INDEXED_LVALUE_SET
+
+internal class KtArrayAccessReferenceDescriptorsImpl(
+    expression: KtArrayAccessExpression
+) : KtArrayAccessReference(expression), KtDescriptorsBasedReference {
+    override fun isReferenceTo(element: PsiElement): Boolean =
+        super<KtDescriptorsBasedReference>.isReferenceTo(element)
+
+    override fun moveFunctionLiteralOutsideParentheses(callExpression: KtCallExpression) {
+        callExpression.moveFunctionLiteralOutsideParentheses()
+    }
+
+    override fun canMoveLambdaOutsideParentheses(callExpression: KtCallExpression): Boolean =
+        callExpression.canMoveLambdaOutsideParentheses()
+
+    override fun doRenameImplicitConventionalCall(newName: String?): KtExpression =
+        renameImplicitConventionalCall(newName)
+
+    override fun getTargetDescriptors(context: BindingContext): Collection<DeclarationDescriptor> {
+        val getFunctionDescriptor = context[INDEXED_LVALUE_GET, expression]?.candidateDescriptor
+        val setFunctionDescriptor = context[INDEXED_LVALUE_SET, expression]?.candidateDescriptor
+        return listOfNotNull(getFunctionDescriptor, setFunctionDescriptor)
+    }
+}

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/KtCollectionLiteralReferenceDescriptorsImpl.kt

@@ -0,0 +1,23 @@
+/*
+ * 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.idea.references
+
+import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+import org.jetbrains.kotlin.psi.KtCollectionLiteralExpression
+import org.jetbrains.kotlin.resolve.BindingContext
+
+class KtCollectionLiteralReferenceDescriptorsImpl(
+    expression: KtCollectionLiteralExpression
+) : KtCollectionLiteralReference(expression), KtDescriptorsBasedReference {
+    override fun isReferenceTo(element: PsiElement): Boolean =
+        super<KtDescriptorsBasedReference>.isReferenceTo(element)
+
+    override fun getTargetDescriptors(context: BindingContext): Collection<DeclarationDescriptor> {
+        val resolvedCall = context[BindingContext.COLLECTION_LITERAL_CALL, element]
+        return listOfNotNull(resolvedCall?.resultingDescriptor)
+    }
+}

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/KtConstructorDelegationReference.java

@@ -1,51 +0,0 @@
-/*
- * Copyright 2010-2015 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.jetbrains.kotlin.idea.references;
-
-import com.intellij.openapi.util.TextRange;
-import com.intellij.psi.PsiElement;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-import org.jetbrains.kotlin.name.Name;
-import org.jetbrains.kotlin.psi.KtConstructorDelegationReferenceExpression;
-
-import java.util.Collection;
-import java.util.Collections;
-
-public class KtConstructorDelegationReference extends KtSimpleReference<KtConstructorDelegationReferenceExpression> {
-    public KtConstructorDelegationReference(KtConstructorDelegationReferenceExpression expression) {
-        super(expression);
-    }
-
-    @Override
-    public TextRange getRangeInElement() {
-        return new TextRange(0, getElement().getTextLength());
-    }
-
-    @NotNull
-    @Override
-    public Collection<Name> getResolvesByNames() {
-        return Collections.emptyList();
-    }
-
-    @Nullable
-    @Override
-    public PsiElement handleElementRename(@Nullable String newElementName) {
-        // Class rename never affects this reference, so there is no need to fail with exception
-        return getExpression();
-    }
-}

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/KtConstructorDelegationReferenceDescriptorsImpl.kt

@@ -0,0 +1,20 @@
+/*
+ * 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.idea.references
+
+import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.psi.KtConstructorDelegationReferenceExpression
+import org.jetbrains.kotlin.resolve.BindingContext
+import org.jetbrains.kotlin.resolve.bindingContextUtil.getReferenceTargets
+
+class KtConstructorDelegationReferenceDescriptorsImpl(
+    expression: KtConstructorDelegationReferenceExpression
+) : KtConstructorDelegationReference(expression), KtDescriptorsBasedReference {
+
+    override fun isReferenceTo(element: PsiElement): Boolean =
+        super<KtDescriptorsBasedReference>.isReferenceTo(element)
+
+    override fun getTargetDescriptors(context: BindingContext) = expression.getReferenceTargets(context)
+}

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/KtDestructuringDeclarationReferenceDescriptorsImpl.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -16,8 +16,12 @@ import org.jetbrains.kotlin.psi.KtDestructuringDeclaration
 import org.jetbrains.kotlin.psi.KtDestructuringDeclarationEntry
 import org.jetbrains.kotlin.resolve.BindingContext
 
-class KtDestructuringDeclarationReference(element: KtDestructuringDeclarationEntry) :
+class KtDestructuringDeclarationReferenceDescriptorsImpl(
-    AbstractKtReference<KtDestructuringDeclarationEntry>(element) {
+    element: KtDestructuringDeclarationEntry
+) : KtDestructuringDeclarationReference(element), KtDescriptorsBasedReference {
+    override fun isReferenceTo(element: PsiElement): Boolean =
+        super<KtDescriptorsBasedReference>.isReferenceTo(element)
+
     override fun getTargetDescriptors(context: BindingContext): Collection<DeclarationDescriptor> {
         return listOfNotNull(context[BindingContext.COMPONENT_RESOLVED_CALL, element]?.candidateDescriptor)
     }
@@ -30,16 +34,4 @@ class KtDestructuringDeclarationReference(element: KtDestructuringDeclarationEnt
             it is CallableMemberDescriptor && it.kind == CallableMemberDescriptor.Kind.SYNTHESIZED
         }
     }
-
-    override fun handleElementRename(newElementName: String): PsiElement? {
-        if (canRename()) return expression
-        throw IncorrectOperationException()
-    }
-
-    override val resolvesByNames: Collection<Name>
-        get() {
-            val destructuringParent = element.parent as? KtDestructuringDeclaration ?: return emptyList()
-            val componentIndex = destructuringParent.entries.indexOf(element) + 1
-            return listOf(Name.identifier("component$componentIndex"))
-        }
 }

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/KtForLoopInReferenceDescriptorsImpl.kt

@@ -1,45 +1,34 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.idea.references
 
 import com.intellij.openapi.util.TextRange
+import com.intellij.psi.PsiElement
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.KtForExpression
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.util.OperatorNameConventions
 
-class KtForLoopInReference(element: KtForExpression) : KtMultiReference<KtForExpression>(element) {
+class KtForLoopInReferenceDescriptorsImpl(
-
+    element: KtForExpression
-    override fun getRangeInElement(): TextRange {
+) : KtForLoopInReference(element), KtDescriptorsBasedReference {
-        val inKeyword = expression.inKeyword ?: return TextRange.EMPTY_RANGE
+    override fun isReferenceTo(element: PsiElement): Boolean =
-
+        super<KtDescriptorsBasedReference>.isReferenceTo(element)
-        val offset = inKeyword.startOffsetInParent
-        return TextRange(offset, offset + inKeyword.textLength)
-    }
 
     override fun getTargetDescriptors(context: BindingContext): Collection<DeclarationDescriptor> {
         val loopRange = expression.loopRange ?: return emptyList()
         return LOOP_RANGE_KEYS.mapNotNull { key -> context.get(key, loopRange)?.candidateDescriptor }
     }
 
-    override val resolvesByNames: Collection<Name>
-        get() = NAMES
-
     companion object {
         private val LOOP_RANGE_KEYS = arrayOf(
             BindingContext.LOOP_RANGE_ITERATOR_RESOLVED_CALL,
             BindingContext.LOOP_RANGE_NEXT_RESOLVED_CALL,
             BindingContext.LOOP_RANGE_HAS_NEXT_RESOLVED_CALL
         )
-
-        private val NAMES = listOf(
-            OperatorNameConventions.ITERATOR,
-            OperatorNameConventions.NEXT,
-            OperatorNameConventions.HAS_NEXT
-        )
     }
 }

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/KtInvokeFunctionReferenceDescriptorsImpl.kt

@@ -0,0 +1,38 @@
+/*
+ * 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.idea.references
+
+import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+import org.jetbrains.kotlin.psi.Call
+import org.jetbrains.kotlin.psi.KtCallExpression
+import org.jetbrains.kotlin.psi.KtExpression
+import org.jetbrains.kotlin.resolve.BindingContext
+import org.jetbrains.kotlin.resolve.calls.callUtil.getCall
+import org.jetbrains.kotlin.resolve.calls.callUtil.getResolvedCall
+import org.jetbrains.kotlin.resolve.calls.model.VariableAsFunctionResolvedCall
+
+class KtInvokeFunctionReferenceDescriptorsImpl(expression: KtCallExpression) : KtInvokeFunctionReference(expression), KtDescriptorsBasedReference {
+    override fun isReferenceTo(element: PsiElement): Boolean =
+        super<KtDescriptorsBasedReference>.isReferenceTo(element)
+
+
+    override fun getTargetDescriptors(context: BindingContext): Collection<DeclarationDescriptor> {
+        val call = element.getCall(context)
+        val resolvedCall = call.getResolvedCall(context)
+        return when {
+            resolvedCall is VariableAsFunctionResolvedCall ->
+                setOf<DeclarationDescriptor>((resolvedCall as VariableAsFunctionResolvedCall).functionCall.candidateDescriptor)
+            call != null && resolvedCall != null && call.callType == Call.CallType.INVOKE ->
+                setOf<DeclarationDescriptor>(resolvedCall.candidateDescriptor)
+            else ->
+                emptyList()
+        }
+    }
+
+    override fun doRenameImplicitConventionalCall(newName: String?): KtExpression =
+        renameImplicitConventionalCall(newName)
+}

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/KtPropertyDelegationMethodsReference.kt

@@ -1,56 +0,0 @@
-/*
- * Copyright 2010-2015 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.jetbrains.kotlin.idea.references
-
-import com.intellij.openapi.util.TextRange
-import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
-import org.jetbrains.kotlin.descriptors.VariableDescriptorWithAccessors
-import org.jetbrains.kotlin.descriptors.accessors
-import org.jetbrains.kotlin.name.Name
-import org.jetbrains.kotlin.psi.KtProperty
-import org.jetbrains.kotlin.psi.KtPropertyDelegate
-import org.jetbrains.kotlin.psi.psiUtil.getStrictParentOfType
-import org.jetbrains.kotlin.resolve.BindingContext
-import org.jetbrains.kotlin.util.OperatorNameConventions
-
-class KtPropertyDelegationMethodsReference(element: KtPropertyDelegate) : KtMultiReference<KtPropertyDelegate>(element) {
-
-    override fun getRangeInElement(): TextRange {
-        val byKeywordNode = expression.byKeywordNode
-        val offset = byKeywordNode.psi!!.startOffsetInParent
-        return TextRange(offset, offset + byKeywordNode.textLength)
-    }
-
-    override fun getTargetDescriptors(context: BindingContext): Collection<DeclarationDescriptor> {
-        val property = expression.getStrictParentOfType<KtProperty>() ?: return emptyList()
-        val descriptor = context[BindingContext.DECLARATION_TO_DESCRIPTOR, property] as? VariableDescriptorWithAccessors
-            ?: return emptyList()
-        return (descriptor.accessors.mapNotNull { accessor ->
-            context.get(BindingContext.DELEGATED_PROPERTY_RESOLVED_CALL, accessor)?.candidateDescriptor
-        } + listOfNotNull(context.get(BindingContext.PROVIDE_DELEGATE_RESOLVED_CALL, descriptor)?.candidateDescriptor))
-    }
-
-    override val resolvesByNames: Collection<Name> get() = NAMES
-
-    companion object {
-        private val NAMES = listOf(
-            OperatorNameConventions.GET_VALUE,
-            OperatorNameConventions.SET_VALUE,
-            OperatorNameConventions.PROVIDE_DELEGATE
-        )
-    }
-}

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/KtPropertyDelegationMethodsReferenceDescriptorsImpl.kt

@@ -0,0 +1,31 @@
+/*
+ * 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.idea.references
+
+import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+import org.jetbrains.kotlin.descriptors.VariableDescriptorWithAccessors
+import org.jetbrains.kotlin.descriptors.accessors
+import org.jetbrains.kotlin.psi.KtProperty
+import org.jetbrains.kotlin.psi.KtPropertyDelegate
+import org.jetbrains.kotlin.psi.psiUtil.getStrictParentOfType
+import org.jetbrains.kotlin.resolve.BindingContext
+
+class KtPropertyDelegationMethodsReferenceDescriptorsImpl(
+    element: KtPropertyDelegate
+) : KtPropertyDelegationMethodsReference(element), KtDescriptorsBasedReference {
+    override fun isReferenceTo(element: PsiElement): Boolean =
+        super<KtDescriptorsBasedReference>.isReferenceTo(element)
+
+    override fun getTargetDescriptors(context: BindingContext): Collection<DeclarationDescriptor> {
+        val property = expression.getStrictParentOfType<KtProperty>() ?: return emptyList()
+        val descriptor = context[BindingContext.DECLARATION_TO_DESCRIPTOR, property] as? VariableDescriptorWithAccessors
+            ?: return emptyList()
+        return descriptor.accessors.mapNotNull { accessor ->
+            context.get(BindingContext.DELEGATED_PROPERTY_RESOLVED_CALL, accessor)?.candidateDescriptor
+        } + listOfNotNull(context.get(BindingContext.PROVIDE_DELEGATE_RESOLVED_CALL, descriptor)?.candidateDescriptor)
+    }
+}

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/KtReference.kt

@@ -1,17 +1,6 @@
 /*
- * Copyright 2010-2015 JetBrains s.r.o.
+ * 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.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
  */
 
 package org.jetbrains.kotlin.idea.references
@@ -51,251 +40,83 @@ import org.jetbrains.kotlin.resolve.bindingContextUtil.getReferenceTargets
 import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
 import java.util.*
 
-interface KtReference : PsiPolyVariantReference {
+interface KtDescriptorsBasedReference : KtReference {
-    fun resolveToDescriptors(bindingContext: BindingContext): Collection<DeclarationDescriptor>
+    override val resolver get() = KotlinDescriptorsBasedReferenceResolver
 
-    override fun getElement(): KtElement
+    fun resolveToDescriptors(bindingContext: BindingContext): Collection<DeclarationDescriptor> {
-
+        return getTargetDescriptors(bindingContext)
-    val resolvesByNames: Collection<Name>
-}
-
-abstract class AbstractKtReference<T : KtElement>(element: T) : PsiPolyVariantReferenceBase<T>(element), KtReference {
-    val expression: T
-        get() = element
-
-    override fun multiResolve(incompleteCode: Boolean): Array<ResolveResult> {
-        @Suppress("UNCHECKED_CAST")
-        val kotlinResolver = KOTLIN_RESOLVER as ResolveCache.PolyVariantResolver<AbstractKtReference<T>>
-        return ResolveCache.getInstance(expression.project).resolveWithCaching(this, kotlinResolver, false, incompleteCode)
     }
 
+    fun getTargetDescriptors(context: BindingContext): Collection<DeclarationDescriptor>
+
     override fun isReferenceTo(element: PsiElement): Boolean {
         return matchesTarget(element)
     }
-
-    override fun getCanonicalText(): String = "<TBD>"
-
-    open fun canRename(): Boolean = false
-    override fun handleElementRename(newElementName: String): PsiElement? = throw IncorrectOperationException()
-
-    override fun bindToElement(element: PsiElement): PsiElement = throw IncorrectOperationException()
-
-    @Suppress("UNCHECKED_CAST")
-    override fun getVariants(): Array<Any> = PsiReference.EMPTY_ARRAY as Array<Any>
-
-    override fun isSoft(): Boolean = false
-
-    override fun resolveToDescriptors(bindingContext: BindingContext): Collection<DeclarationDescriptor> {
-        return getTargetDescriptors(bindingContext)
-    }
-
-    protected abstract fun getTargetDescriptors(context: BindingContext): Collection<DeclarationDescriptor>
-
-    override fun toString() = this::class.java.simpleName + ": " + expression.text
-
-    companion object {
-        private object FirReferenceResolveHelper {
-            fun FirResolvedTypeRef.toTargetPsi(session: FirSession): PsiElement? {
-                val type = type as? ConeLookupTagBasedType ?: return null
-                return (type.lookupTag.toSymbol(session) as? AbstractFirBasedSymbol<*>)?.fir?.psi
-            }
-
-            fun ClassId.toTargetPsi(session: FirSession, calleeReference: FirReference? = null): PsiElement? {
-                val classLikeDeclaration = ConeClassLikeLookupTagImpl(this).toSymbol(session)?.fir
-                if (classLikeDeclaration is FirRegularClass) {
-                    if (calleeReference is FirResolvedNamedReference) {
-                        val callee = calleeReference.resolvedSymbol.fir as? FirCallableMemberDeclaration
-                        // TODO: check callee owner directly?
-                        if (callee !is FirConstructor && callee?.isStatic != true) {
-                            classLikeDeclaration.companionObject?.let { return it.psi }
-                        }
-                    }
-                }
-                return classLikeDeclaration?.psi
-            }
-
-            fun FirReference.toTargetPsi(session: FirSession): PsiElement? {
-                return when (this) {
-                    is FirResolvedNamedReference -> {
-                        resolvedSymbol.fir.psi
-                    }
-                    is FirResolvedCallableReference -> {
-                        resolvedSymbol.fir.psi
-                    }
-                    is FirThisReference -> {
-                        boundSymbol?.fir?.psi
-                    }
-                    is FirSuperReference -> {
-                        (superTypeRef as? FirResolvedTypeRef)?.toTargetPsi(session)
-                    }
-                    else -> {
-                        null
-                    }
-                }
-            }
-
-            fun resolveToPsiElements(ref: AbstractKtReference<KtElement>): Collection<PsiElement> {
-                val expression = ref.expression
-                val state = expression.firResolveState()
-                val session = state.getSession(expression)
-                when (val fir = expression.getOrBuildFir(state)) {
-                    is FirResolvable -> {
-                        return listOfNotNull(fir.calleeReference.toTargetPsi(session))
-                    }
-                    is FirResolvedTypeRef -> {
-                        return listOfNotNull(fir.toTargetPsi(session))
-                    }
-                    is FirResolvedQualifier -> {
-                        val classId = fir.classId ?: return emptyList()
-                        // Distinguish A.foo() from A(.Companion).foo()
-                        // Make expression.parent as? KtDotQualifiedExpression local function
-                        var parent = expression.parent as? KtDotQualifiedExpression
-                        while (parent != null) {
-                            val selectorExpression = parent.selectorExpression ?: break
-                            if (selectorExpression === expression) {
-                                parent = parent.parent as? KtDotQualifiedExpression
-                                continue
-                            }
-                            val parentFir = selectorExpression.getOrBuildFir(state)
-                            if (parentFir is FirQualifiedAccess) {
-                                return listOfNotNull(classId.toTargetPsi(session, parentFir.calleeReference))
-                            }
-                            parent = parent.parent as? KtDotQualifiedExpression
-                        }
-                        return listOfNotNull(classId.toTargetPsi(session))
-                    }
-                    is FirAnnotationCall -> {
-                        val type = fir.typeRef as? FirResolvedTypeRef ?: return emptyList()
-                        return listOfNotNull(type.toTargetPsi(session))
-                    }
-                    is FirResolvedImport -> {
-                        var parent = expression.parent
-                        while (parent is KtDotQualifiedExpression) {
-                            if (parent.selectorExpression !== expression) {
-                                // Special: package reference in the middle of import directive
-                                // import a.<caret>b.c.SomeClass
-                                // TODO: return reference to PsiPackage
-                                return listOf(expression)
-                            }
-                            parent = parent.parent
-                        }
-                        val classId = fir.resolvedClassId
-                        if (classId != null) {
-                            return listOfNotNull(classId.toTargetPsi(session))
-                        }
-                        val name = fir.importedName ?: return emptyList()
-                        val symbolProvider = session.firSymbolProvider
-                        return symbolProvider.getTopLevelCallableSymbols(fir.packageFqName, name).mapNotNull { it.fir.psi } +
-                                listOfNotNull(symbolProvider.getClassLikeSymbolByFqName(ClassId(fir.packageFqName, name))?.fir?.psi)
-                    }
-                    is FirFile -> {
-                        if (expression.getNonStrictParentOfType<KtPackageDirective>() != null) {
-                            // Special: package reference in the middle of package directive
-                            return listOf(expression)
-                        }
-                        return listOfNotNull(fir.psi)
-                    }
-                    is FirArrayOfCall -> {
-                        // We can't yet find PsiElement for arrayOf, intArrayOf, etc.
-                        return emptyList()
-                    }
-                    is FirErrorNamedReference -> {
-                        return emptyList()
-                    }
-                    else -> {
-                        // Handle situation when we're in the middle/beginning of qualifier
-                        // <caret>A.B.C.foo() or A.<caret>B.C.foo()
-                        // NB: in this case we get some parent FIR, like FirBlock, FirProperty, FirFunction or the like
-                        var parent = expression.parent as? KtDotQualifiedExpression
-                        var unresolvedCounter = 1
-                        while (parent != null) {
-                            val selectorExpression = parent.selectorExpression ?: break
-                            if (selectorExpression === expression) {
-                                parent = parent.parent as? KtDotQualifiedExpression
-                                continue
-                            }
-                            val parentFir = selectorExpression.getOrBuildFir(state)
-                            if (parentFir is FirResolvedQualifier) {
-                                var classId = parentFir.classId
-                                while (unresolvedCounter > 0) {
-                                    unresolvedCounter--
-                                    classId = classId?.outerClassId
-                                }
-                                return listOfNotNull(classId?.toTargetPsi(session))
-                            }
-                            parent = parent.parent as? KtDotQualifiedExpression
-                            unresolvedCounter++
-                        }
-                        return emptyList()
-                    }
-                }
-            }
-        }
-
-        class KotlinReferenceResolver : ResolveCache.PolyVariantResolver<AbstractKtReference<KtElement>> {
-            class KotlinResolveResult(element: PsiElement) : PsiElementResolveResult(element)
-
-            private fun resolveToPsiElements(ref: AbstractKtReference<KtElement>): Collection<PsiElement> {
-                if (FirResolution.enabled) {
-                    return FirReferenceResolveHelper.resolveToPsiElements(ref)
-                }
-                val bindingContext = ref.expression.analyze(BodyResolveMode.PARTIAL)
-                return resolveToPsiElements(ref, bindingContext, ref.getTargetDescriptors(bindingContext))
-            }
-
-            private fun resolveToPsiElements(
-                ref: AbstractKtReference<KtElement>,
-                context: BindingContext,
-                targetDescriptors: Collection<DeclarationDescriptor>
-            ): Collection<PsiElement> {
-                if (targetDescriptors.isNotEmpty()) {
-                    return targetDescriptors.flatMap { target -> resolveToPsiElements(ref, target) }.toSet()
-                }
-
-                val labelTargets = getLabelTargets(ref, context)
-                if (labelTargets != null) {
-                    return labelTargets
-                }
-
-                return Collections.emptySet()
-            }
-
-            private fun resolveToPsiElements(
-                ref: AbstractKtReference<KtElement>,
-                targetDescriptor: DeclarationDescriptor
-            ): Collection<PsiElement> {
-                return if (targetDescriptor is PackageViewDescriptor) {
-                    val psiFacade = JavaPsiFacade.getInstance(ref.expression.project)
-                    val fqName = targetDescriptor.fqName.asString()
-                    listOfNotNull(psiFacade.findPackage(fqName))
-                } else {
-                    DescriptorToSourceUtilsIde.getAllDeclarations(ref.expression.project, targetDescriptor, ref.expression.resolveScope)
-                }
-            }
-
-            private fun getLabelTargets(ref: AbstractKtReference<KtElement>, context: BindingContext): Collection<PsiElement>? {
-                val reference = ref.expression as? KtReferenceExpression ?: return null
-                val labelTarget = context[BindingContext.LABEL_TARGET, reference]
-                if (labelTarget != null) {
-                    return listOf(labelTarget)
-                }
-                return context[BindingContext.AMBIGUOUS_LABEL_TARGET, reference]
-            }
-
-            override fun resolve(ref: AbstractKtReference<KtElement>, incompleteCode: Boolean): Array<ResolveResult> {
-                return runWithCancellationCheck {
-                    val resolveToPsiElements = resolveToPsiElements(ref)
-                    resolveToPsiElements.map { KotlinResolveResult(it) }.toTypedArray()
-                }
-            }
-        }
-
-        val KOTLIN_RESOLVER = KotlinReferenceResolver()
-    }
 }
 
-abstract class KtSimpleReference<T : KtReferenceExpression>(expression: T) : AbstractKtReference<T>(expression) {
+fun KtReference.resolveToDescriptors(bindingContext: BindingContext): Collection<DeclarationDescriptor> {
-    override fun getTargetDescriptors(context: BindingContext) = expression.getReferenceTargets(context)
+    if (this !is KtDescriptorsBasedReference) {
+        error("Reference $this should be KtDescriptorsBasedReference but was ${this::class}")
+    }
+    return resolveToDescriptors(bindingContext)
 }
 
-abstract class KtMultiReference<T : KtElement>(expression: T) : AbstractKtReference<T>(expression)
+
+object KotlinDescriptorsBasedReferenceResolver : ResolveCache.PolyVariantResolver<KtReference> {
+    class KotlinResolveResult(element: PsiElement) : PsiElementResolveResult(element)
+
+    private fun resolveToPsiElements(ref: KtDescriptorsBasedReference): Collection<PsiElement> {
+        if (FirResolution.enabled) {
+            @Suppress("UNCHECKED_CAST")
+            return FirReferenceResolveHelper.resolveToPsiElements(ref as AbstractKtReference<KtElement>)
+        }
+        val bindingContext = ref.element.analyze(BodyResolveMode.PARTIAL)
+        return resolveToPsiElements(ref, bindingContext, ref.getTargetDescriptors(bindingContext))
+    }
+
+    private fun resolveToPsiElements(
+        ref: KtDescriptorsBasedReference,
+        context: BindingContext,
+        targetDescriptors: Collection<DeclarationDescriptor>
+    ): Collection<PsiElement> {
+        if (targetDescriptors.isNotEmpty()) {
+            return targetDescriptors.flatMap { target -> resolveToPsiElements(ref, target) }.toSet()
+        }
+
+        val labelTargets = getLabelTargets(ref, context)
+        if (labelTargets != null) {
+            return labelTargets
+        }
+
+        return Collections.emptySet()
+    }
+
+    private fun resolveToPsiElements(
+        ref: KtDescriptorsBasedReference,
+        targetDescriptor: DeclarationDescriptor
+    ): Collection<PsiElement> {
+        return if (targetDescriptor is PackageViewDescriptor) {
+            val psiFacade = JavaPsiFacade.getInstance(ref.element.project)
+            val fqName = targetDescriptor.fqName.asString()
+            listOfNotNull(psiFacade.findPackage(fqName))
+        } else {
+            DescriptorToSourceUtilsIde.getAllDeclarations(ref.element.project, targetDescriptor, ref.element.resolveScope)
+        }
+    }
+
+    private fun getLabelTargets(ref: KtDescriptorsBasedReference, context: BindingContext): Collection<PsiElement>? {
+        val reference = ref.element as? KtReferenceExpression ?: return null
+        val labelTarget = context[BindingContext.LABEL_TARGET, reference]
+        if (labelTarget != null) {
+            return listOf(labelTarget)
+        }
+        return context[BindingContext.AMBIGUOUS_LABEL_TARGET, reference]
+    }
+
+    override fun resolve(ref: KtReference, incompleteCode: Boolean): Array<ResolveResult> {
+        return runWithCancellationCheck {
+            val resolveToPsiElements = resolveToPsiElements(ref as KtDescriptorsBasedReference)
+            resolveToPsiElements.map { KotlinResolveResult(it) }.toTypedArray()
+        }
+    }
+}

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/KtSimpleNameReference.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -8,6 +8,7 @@ package org.jetbrains.kotlin.idea.references
 import com.intellij.openapi.extensions.Extensions
 import com.intellij.openapi.util.TextRange
 import com.intellij.psi.PsiElement
+import com.intellij.psi.PsiReference
 import com.intellij.psi.util.PsiTreeUtil
 import com.intellij.util.IncorrectOperationException
 import com.intellij.util.SmartList
@@ -33,15 +34,21 @@ import org.jetbrains.kotlin.psi.psiUtil.*
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.DataClassDescriptorResolver
 import org.jetbrains.kotlin.resolve.ImportedFromObjectCallableDescriptor
+import org.jetbrains.kotlin.resolve.bindingContextUtil.getReferenceTargets
 import org.jetbrains.kotlin.resolve.descriptorUtil.getImportableDescriptor
 import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
 import org.jetbrains.kotlin.types.expressions.OperatorConventions
 
-class KtSimpleNameReference(expression: KtSimpleNameExpression) : KtSimpleReference<KtSimpleNameExpression>(expression) {
+class KtSimpleNameReferenceDescriptorsImpl(
+    expression: KtSimpleNameExpression
+) : KtSimpleNameReference(expression), KtDescriptorsBasedReference {
+    override fun doCanBeReferenceTo(candidateTarget: PsiElement): Boolean =
+        canBeReferenceTo(candidateTarget)
+
     override fun getTargetDescriptors(context: BindingContext): Collection<DeclarationDescriptor> {
         return SmartList<DeclarationDescriptor>().apply {
             // Replace Java property with its accessor(s)
-            for (descriptor in super.getTargetDescriptors(context)) {
+            for (descriptor in expression.getReferenceTargets(context)) {
                 val sizeBefore = size
 
                 if (descriptor !is JavaPropertyDescriptor) {
@@ -71,7 +78,7 @@ class KtSimpleNameReference(expression: KtSimpleNameExpression) : KtSimpleRefere
             if (extension.isReferenceTo(this, element)) return true
         }
 
-        return super.isReferenceTo(element)
+        return super<KtDescriptorsBasedReference>.isReferenceTo(element)
     }
 
     override fun getRangeInElement(): TextRange {
@@ -141,23 +148,18 @@ class KtSimpleNameReference(expression: KtSimpleNameExpression) : KtSimpleRefere
         return expression
     }
 
-    enum class ShorteningMode {
-        NO_SHORTENING,
-        DELAYED_SHORTENING,
-        FORCED_SHORTENING
-    }
 
     // By default reference binding is delayed
     override fun bindToElement(element: PsiElement): PsiElement =
         bindToElement(element, ShorteningMode.DELAYED_SHORTENING)
 
-    fun bindToElement(element: PsiElement, shorteningMode: ShorteningMode): PsiElement =
+    override fun bindToElement(element: PsiElement, shorteningMode: ShorteningMode): PsiElement =
         element.getKotlinFqName()?.let { fqName -> bindToFqName(fqName, shorteningMode, element) } ?: expression
 
-    fun bindToFqName(
+    override fun bindToFqName(
         fqName: FqName,
-        shorteningMode: ShorteningMode = ShorteningMode.DELAYED_SHORTENING,
+        shorteningMode: ShorteningMode,
-        targetElement: PsiElement? = null
+        targetElement: PsiElement?
     ): PsiElement {
         val expression = expression
         if (fqName.isRoot) return expression
@@ -289,7 +291,7 @@ class KtSimpleNameReference(expression: KtSimpleNameExpression) : KtSimpleRefere
             return listOf(element.getReferencedNameAsName())
         }
 
-    fun getImportAlias(): KtImportAlias? {
+    override fun getImportAlias(): KtImportAlias? {
         fun DeclarationDescriptor.unwrap() = if (this is ImportedFromObjectCallableDescriptor<*>) callableFromObject else this
 
         val element = element

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/ReadWriteAccessCheckerDescriptorsImpl.kt

@@ -0,0 +1,23 @@
+/*
+ * 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.idea.references
+
+import org.jetbrains.kotlin.idea.caches.resolve.resolveToCall
+import org.jetbrains.kotlin.psi.KtBinaryExpression
+import org.jetbrains.kotlin.psi.KtExpression
+import org.jetbrains.kotlin.resolve.calls.model.isReallySuccess
+import org.jetbrains.kotlin.types.expressions.OperatorConventions
+
+class ReadWriteAccessCheckerDescriptorsImpl : ReadWriteAccessChecker {
+    override fun readWriteAccessWithFullExpressionByResolve(assignment: KtBinaryExpression): Pair<ReferenceAccess, KtExpression> {
+        val resolvedCall = assignment.resolveToCall() ?: return ReferenceAccess.READ_WRITE to assignment
+        if (!resolvedCall.isReallySuccess()) return ReferenceAccess.READ_WRITE to assignment
+        return if (resolvedCall.resultingDescriptor.name in OperatorConventions.ASSIGNMENT_OPERATIONS.values)
+            ReferenceAccess.READ to assignment
+        else
+            ReferenceAccess.READ_WRITE to assignment
+    }
+}

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/SyntheticPropertyAccessorReference.kt

@@ -1,13 +1,11 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.idea.references
 
-import com.intellij.openapi.util.TextRange
 import com.intellij.psi.PsiElement
-import com.intellij.psi.PsiMethod
 import com.intellij.util.SmartList
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor
@@ -22,14 +20,22 @@ import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.*
 import org.jetbrains.kotlin.resolve.BindingContext
+import org.jetbrains.kotlin.resolve.bindingContextUtil.getReferenceTargets
 import org.jetbrains.kotlin.synthetic.SyntheticJavaPropertyDescriptor
 import org.jetbrains.kotlin.types.expressions.OperatorConventions
 import org.jetbrains.kotlin.utils.addIfNotNull
 
-sealed class SyntheticPropertyAccessorReference(expression: KtNameReferenceExpression, private val getter: Boolean) :
+class SyntheticPropertyAccessorReferenceDescriptorImpl(
-    KtSimpleReference<KtNameReferenceExpression>(expression) {
+    expression: KtNameReferenceExpression,
+    getter: Boolean
+) : SyntheticPropertyAccessorReference(expression, getter), KtDescriptorsBasedReference {
+    override fun isReferenceTo(element: PsiElement): Boolean =
+        super<SyntheticPropertyAccessorReference>.isReferenceTo(element)
+
+    override fun additionalIsReferenceToChecker(element: PsiElement): Boolean = matchesTarget(element)
+
     override fun getTargetDescriptors(context: BindingContext): Collection<DeclarationDescriptor> {
-        val descriptors = super.getTargetDescriptors(context)
+        val descriptors = expression.getReferenceTargets(context)
         if (descriptors.none { it is SyntheticJavaPropertyDescriptor }) return emptyList()
 
         val result = SmartList<FunctionDescriptor>()
@@ -45,23 +51,6 @@ sealed class SyntheticPropertyAccessorReference(expression: KtNameReferenceExpre
         return result
     }
 
-    override fun isReferenceTo(element: PsiElement): Boolean {
-        if (element !is PsiMethod || !isAccessorName(element.name)) return false
-        if (!getter && expression.readWriteAccess(true) == ReferenceAccess.READ) return false
-        return super.isReferenceTo(element)
-    }
-
-    private fun isAccessorName(name: String): Boolean {
-        if (getter) {
-            return name.startsWith("get") || name.startsWith("is")
-        }
-        return name.startsWith("set")
-    }
-
-    override fun getRangeInElement() = TextRange(0, expression.textLength)
-
-    override fun canRename() = true
-
     private fun renameByPropertyName(newName: String): PsiElement? {
         val nameIdentifier = KtPsiFactory(expression).createNameIdentifier(newName)
         expression.getReferencedNameElement().replace(nameIdentifier)
@@ -183,7 +172,4 @@ sealed class SyntheticPropertyAccessorReference(expression: KtNameReferenceExpre
 
     override val resolvesByNames: Collection<Name>
         get() = listOf(element.getReferencedNameAsName())
-
-    class Getter(expression: KtNameReferenceExpression) : SyntheticPropertyAccessorReference(expression, true)
-    class Setter(expression: KtNameReferenceExpression) : SyntheticPropertyAccessorReference(expression, false)
 }

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/referenceUtil.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -221,20 +221,20 @@ fun AbstractKtReference<out KtExpression>.renameImplicitConventionalCall(newName
     return newExpression
 }
 
-val KtSimpleNameExpression.mainReference: KtSimpleNameReference
+val KtSimpleNameExpression.mainReference: KtSimpleNameReferenceDescriptorsImpl
     get() = references.firstIsInstance()
 
-val KtReferenceExpression.mainReference: KtReference
+val KtReferenceExpression.mainReference: KtDescriptorsBasedReference
-    get() = if (this is KtSimpleNameExpression) mainReference else references.firstIsInstance<KtReference>()
+    get() = if (this is KtSimpleNameExpression) mainReference else references.firstIsInstance<KtDescriptorsBasedReference>()
 
 val KDocName.mainReference: KDocReference
     get() = references.firstIsInstance()
 
-val KtElement.mainReference: KtReference?
+val KtElement.mainReference: KtDescriptorsBasedReference?
     get() = when (this) {
         is KtReferenceExpression -> mainReference
         is KDocName -> mainReference
-        else -> references.firstIsInstanceOrNull<KtReference>()
+        else -> references.firstIsInstanceOrNull<KtDescriptorsBasedReference>()
     }
 
 fun KtElement.resolveMainReferenceToDescriptors(): Collection<DeclarationDescriptor> {
@@ -248,46 +248,6 @@ fun PsiReference.getImportAlias(): KtImportAlias? {
 
 // ----------- Read/write access -----------------------------------------------------------------------------------------------------------------------
 
-enum class ReferenceAccess(val isRead: Boolean, val isWrite: Boolean) {
-    READ(true, false), WRITE(false, true), READ_WRITE(true, true)
-}
-
-fun KtExpression.readWriteAccess(useResolveForReadWrite: Boolean) = readWriteAccessWithFullExpression(useResolveForReadWrite).first
-
-fun KtExpression.readWriteAccessWithFullExpression(useResolveForReadWrite: Boolean): Pair<ReferenceAccess, KtExpression> {
-    var expression = getQualifiedExpressionForSelectorOrThis()
-    loop@ while (true) {
-        when (val parent = expression.parent) {
-            is KtParenthesizedExpression, is KtAnnotatedExpression, is KtLabeledExpression -> expression = parent as KtExpression
-            else -> break@loop
-        }
-    }
-
-    val assignment = expression.getAssignmentByLHS()
-    if (assignment != null) {
-        when (assignment.operationToken) {
-            KtTokens.EQ -> return ReferenceAccess.WRITE to assignment
-
-            else -> {
-                if (!useResolveForReadWrite) return ReferenceAccess.READ_WRITE to assignment
-
-                val resolvedCall = assignment.resolveToCall() ?: return ReferenceAccess.READ_WRITE to assignment
-                if (!resolvedCall.isReallySuccess()) return ReferenceAccess.READ_WRITE to assignment
-                return if (resolvedCall.resultingDescriptor.name in OperatorConventions.ASSIGNMENT_OPERATIONS.values)
-                    ReferenceAccess.READ to assignment
-                else
-                    ReferenceAccess.READ_WRITE to assignment
-            }
-        }
-    }
-
-    val unaryExpression = expression.parent as? KtUnaryExpression
-    return if (unaryExpression != null && unaryExpression.operationToken in constant { setOf(KtTokens.PLUSPLUS, KtTokens.MINUSMINUS) })
-        ReferenceAccess.READ_WRITE to unaryExpression
-    else
-        ReferenceAccess.READ to expression
-}
-
 fun KtReference.canBeResolvedViaImport(target: DeclarationDescriptor, bindingContext: BindingContext): Boolean {
     if (this is KDocReference) {
         val qualifier = element.getQualifier() ?: return true

idea/idea-core/build.gradle.kts

@@ -16,6 +16,7 @@ dependencies {
     compile(project(":compiler:util"))
     compile(project(":idea:ide-common"))
     compile(project(":idea:idea-jps-common"))
+    compile(project(":idea:idea-frontend-independent"))
     compile(project(":kotlin-util-klib-metadata"))
     compile(project(":plugins:android-extensions-compiler"))
     compile(project(":kotlin-scripting-compiler-impl"))

idea/idea-core/src/org/jetbrains/kotlin/idea/core/Utils.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -158,8 +158,6 @@ fun KtCallableDeclaration.canOmitDeclaredType(initializerOrBodyExpression: KtExp
     return canChangeTypeToSubtype && expressionType.isSubtypeOf(declaredType)
 }
 
-fun String.unquote(): String = KtPsiUtil.unquoteIdentifier(this)
-
 fun FqName.quoteSegmentsIfNeeded(): String {
     return pathSegments().joinToString(".") { it.asString().quoteIfNeeded() }
 }

idea/idea-core/src/org/jetbrains/kotlin/idea/core/psiModificationUtils.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -45,14 +45,6 @@ import org.jetbrains.kotlin.types.typeUtil.isTypeParameter
 import org.jetbrains.kotlin.utils.KotlinExceptionWithAttachments
 import org.jetbrains.kotlin.utils.SmartList
 
-inline fun <reified T : PsiElement> PsiElement.replaced(newElement: T): T {
-    val result = replace(newElement)
-    return result as? T ?: (result as KtParenthesizedExpression).expression as T
-}
-
-@Suppress("UNCHECKED_CAST")
-fun <T : PsiElement> T.copied(): T = copy() as T
-
 fun KtLambdaArgument.moveInsideParentheses(bindingContext: BindingContext): KtCallExpression {
     val ktExpression = this.getArgumentExpression()
         ?: throw KotlinExceptionWithAttachments("no argument expression for $this")

idea/idea-frontend-independent/build.gradle.kts

@@ -0,0 +1,37 @@
+plugins {
+    kotlin("jvm")
+    id("jps-compatible")
+}
+
+dependencies {
+    /*
+    This module should not depend on compiler scpecific functionality
+    No dependencies on descriptors (for now we still have transitive one by psi module), fir and similar modules,
+    but may be dependencies on frontend independent one like psi & type-system
+    This module is needed for smooth migration from descriptor frontend based IJ plugin to interlayer based one
+     */
+    compileOnly(project(":compiler:psi"))
+    compileOnly(project(":kotlin-reflect-api"))
+    compileOnly(intellijCoreDep())
+    compileOnly(intellijDep())
+
+    Platform[191].orLower {
+        compileOnly(intellijDep()) { includeJars("java-api", "java-impl") }
+    }
+
+    Platform[192].orHigher {
+        compileOnly(intellijPluginDep("java")) { includeJars("java-api", "java-impl") }
+    }
+}
+
+sourceSets {
+    "main" { projectDefault() }
+    "test" { projectDefault() }
+}
+
+testsJar()
+
+projectTest {
+    dependsOn(":dist")
+    workingDir = rootDir
+}

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/core/frontendIndependentPsiUtils.kt

@@ -0,0 +1,24 @@
+/*
+ * 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.idea.core
+
+import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.psi.KtParenthesizedExpression
+import org.jetbrains.kotlin.psi.KtPsiUtil
+
+inline fun <reified T : PsiElement> PsiElement.replaced(newElement: T): T {
+    val result = replace(newElement)
+    return result as? T ?: (result as KtParenthesizedExpression).expression as T
+}
+
+//todo make inline
+@Suppress("UNCHECKED_CAST")
+fun <T : PsiElement> T.copied(): T = copy() as T
+
+fun String.unquote(): String = KtPsiUtil.unquoteIdentifier(this)
+
+
+

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/references/KtArrayAccessReference.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -8,24 +8,15 @@ package org.jetbrains.kotlin.idea.references
 import com.google.common.collect.Lists
 import com.intellij.psi.MultiRangeReference
 import com.intellij.psi.PsiElement
-import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
-import org.jetbrains.kotlin.idea.core.canMoveLambdaOutsideParentheses
-import org.jetbrains.kotlin.idea.core.moveFunctionLiteralOutsideParentheses
 import org.jetbrains.kotlin.idea.core.replaced
 import org.jetbrains.kotlin.lexer.KtToken
 import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.name.Name
-import org.jetbrains.kotlin.psi.KtArrayAccessExpression
+import org.jetbrains.kotlin.psi.*
-import org.jetbrains.kotlin.psi.KtPsiFactory
-import org.jetbrains.kotlin.psi.KtQualifiedExpression
-import org.jetbrains.kotlin.psi.buildExpression
 import org.jetbrains.kotlin.psi.psiUtil.getPossiblyQualifiedCallExpression
-import org.jetbrains.kotlin.resolve.BindingContext
-import org.jetbrains.kotlin.resolve.BindingContext.INDEXED_LVALUE_GET
-import org.jetbrains.kotlin.resolve.BindingContext.INDEXED_LVALUE_SET
 import org.jetbrains.kotlin.util.OperatorNameConventions
 
-class KtArrayAccessReference(
+abstract class KtArrayAccessReference(
     expression: KtArrayAccessExpression
 ) : KtSimpleReference<KtArrayAccessExpression>(expression), MultiRangeReference {
     override val resolvesByNames: Collection<Name>
@@ -33,12 +24,6 @@ class KtArrayAccessReference(
 
     override fun getRangeInElement() = element.textRange.shiftRight(-element.textOffset)
 
-    override fun getTargetDescriptors(context: BindingContext): Collection<DeclarationDescriptor> {
-        val getFunctionDescriptor = context[INDEXED_LVALUE_GET, expression]?.candidateDescriptor
-        val setFunctionDescriptor = context[INDEXED_LVALUE_SET, expression]?.candidateDescriptor
-        return listOfNotNull(getFunctionDescriptor, setFunctionDescriptor)
-    }
-
     private fun getBracketRange(bracketToken: KtToken) =
         expression.indicesNode.node.findChildByType(bracketToken)?.textRange?.shiftRight(-expression.textOffset)
 
@@ -65,15 +50,19 @@ class KtArrayAccessReference(
             }
             val fullCallExpression = arrayAccessExpression.replaced(replacement)
             val callExpression = fullCallExpression.getPossiblyQualifiedCallExpression()
-            if (callExpression != null && callExpression.canMoveLambdaOutsideParentheses()) {
+            if (callExpression != null && canMoveLambdaOutsideParentheses(callExpression)) {
-                callExpression.moveFunctionLiteralOutsideParentheses()
+                moveFunctionLiteralOutsideParentheses(callExpression)
             }
             return fullCallExpression
         }
 
-        return this.renameImplicitConventionalCall(newElementName)
+        return doRenameImplicitConventionalCall(newElementName)
     }
 
+    protected abstract fun moveFunctionLiteralOutsideParentheses(callExpression: KtCallExpression)
+    protected abstract fun canMoveLambdaOutsideParentheses(callExpression: KtCallExpression): Boolean
+    protected abstract fun doRenameImplicitConventionalCall(newName: String?): KtExpression
+
     companion object {
         private val NAMES = Lists.newArrayList(OperatorNameConventions.GET, OperatorNameConventions.SET)
     }

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/references/KtCollectionLiteralReference.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -8,26 +8,18 @@ package org.jetbrains.kotlin.idea.references
 import com.intellij.openapi.util.TextRange
 import com.intellij.psi.MultiRangeReference
 import com.intellij.psi.PsiElement
-import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.KtCollectionLiteralExpression
-import org.jetbrains.kotlin.resolve.BindingContext
+import org.jetbrains.kotlin.resolve.ArrayFqNames
-import org.jetbrains.kotlin.resolve.CollectionLiteralResolver
 
-class KtCollectionLiteralReference(expression: KtCollectionLiteralExpression) :
+abstract class KtCollectionLiteralReference(expression: KtCollectionLiteralExpression) :
     KtSimpleReference<KtCollectionLiteralExpression>(expression), MultiRangeReference {
     companion object {
-        private val COLLECTION_LITERAL_CALL_NAMES =
+        private val COLLECTION_LITERAL_CALL_NAMES = ArrayFqNames.PRIMITIVE_TYPE_TO_ARRAY.values + ArrayFqNames.ARRAY_OF_FUNCTION
-            CollectionLiteralResolver.PRIMITIVE_TYPE_TO_ARRAY.values + CollectionLiteralResolver.ARRAY_OF_FUNCTION
     }
 
     override fun getRangeInElement(): TextRange = element.normalizeRange()
 
-    override fun getTargetDescriptors(context: BindingContext): Collection<DeclarationDescriptor> {
-        val resolvedCall = context[BindingContext.COLLECTION_LITERAL_CALL, element]
-        return listOfNotNull(resolvedCall?.resultingDescriptor)
-    }
-
     override fun getRanges(): List<TextRange> {
         return listOfNotNull(element.leftBracket?.normalizeRange(), element.rightBracket?.normalizeRange())
     }

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/references/KtConstructorDelegationReference.kt

@@ -0,0 +1,26 @@
+/*
+ * 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.idea.references
+
+import com.intellij.openapi.util.TextRange
+import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.psi.KtConstructorDelegationReferenceExpression
+
+abstract class KtConstructorDelegationReference(
+    expression: KtConstructorDelegationReferenceExpression
+) : KtSimpleReference<KtConstructorDelegationReferenceExpression>(expression) {
+    override fun getRangeInElement(): TextRange {
+        return TextRange(0, element.textLength)
+    }
+
+    override val resolvesByNames: Collection<Name>
+        get() = emptyList()
+
+    override fun handleElementRename(newElementName: String): PsiElement? {
+        // Class rename never affects this reference, so there is no need to fail with exception
+        return expression
+    }
+}

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/references/KtDestructuringDeclarationReference.kt

@@ -0,0 +1,34 @@
+/*
+ * 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.idea.references
+
+import com.intellij.openapi.util.TextRange
+import com.intellij.psi.PsiElement
+import com.intellij.util.IncorrectOperationException
+import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.psi.KtDestructuringDeclaration
+import org.jetbrains.kotlin.psi.KtDestructuringDeclarationEntry
+
+abstract class KtDestructuringDeclarationReference(
+    element: KtDestructuringDeclarationEntry
+) : AbstractKtReference<KtDestructuringDeclarationEntry>(element) {
+
+    override fun getRangeInElement() = TextRange(0, element.textLength)
+
+    abstract override fun canRename(): Boolean
+
+    override fun handleElementRename(newElementName: String): PsiElement? {
+        if (canRename()) return expression
+        throw IncorrectOperationException()
+    }
+
+    override val resolvesByNames: Collection<Name>
+        get() {
+            val destructuringParent = element.parent as? KtDestructuringDeclaration ?: return emptyList()
+            val componentIndex = destructuringParent.entries.indexOf(element) + 1
+            return listOf(Name.identifier("component$componentIndex"))
+        }
+}

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/references/KtForLoopInReference.kt

@@ -0,0 +1,31 @@
+/*
+ * 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.idea.references
+
+import com.intellij.openapi.util.TextRange
+import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.psi.KtForExpression
+import org.jetbrains.kotlin.util.OperatorNameConventions
+
+abstract class KtForLoopInReference(element: KtForExpression) : KtMultiReference<KtForExpression>(element) {
+    override fun getRangeInElement(): TextRange {
+        val inKeyword = expression.inKeyword ?: return TextRange.EMPTY_RANGE
+
+        val offset = inKeyword.startOffsetInParent
+        return TextRange(offset, offset + inKeyword.textLength)
+    }
+
+    override val resolvesByNames: Collection<Name>
+        get() = NAMES
+
+    companion object {
+        private val NAMES = listOf(
+            OperatorNameConventions.ITERATOR,
+            OperatorNameConventions.NEXT,
+            OperatorNameConventions.HAS_NEXT
+        )
+    }
+}

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/references/KtIdeReferenceProviderService.kt

@@ -1,10 +1,11 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * that can be found in the license/LICENSE.txt file.
+ * 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.idea.references
 
+import com.intellij.openapi.components.service
 import com.intellij.openapi.project.IndexNotReadyException
 import com.intellij.psi.ContributedReferenceHost
 import com.intellij.psi.PsiElement
@@ -21,15 +22,20 @@ import org.jetbrains.kotlin.psi.KotlinReferenceProvidersService
 import org.jetbrains.kotlin.psi.KtElement
 import org.jetbrains.kotlin.utils.SmartList
 
-internal interface KotlinPsiReferenceProvider {
+interface KotlinPsiReferenceProvider {
     fun getReferencesByElement(element: PsiElement): Array<PsiReference>
 }
 
-internal interface KotlinReferenceProviderContributor {
+interface KotlinReferenceProviderContributor {
     fun registerReferenceProviders(registrar: KotlinPsiReferenceRegistrar)
+
+    companion object {
+        fun getInstance(): KotlinReferenceProviderContributor = service()
+    }
 }
 
-internal class KotlinPsiReferenceRegistrar {
+
+class KotlinPsiReferenceRegistrar {
     val providers: MultiMap<Class<out PsiElement>, KotlinPsiReferenceProvider> = MultiMap.create()
 
     inline fun <reified E : KtElement> registerProvider(crossinline factory: (E) -> PsiReference?) {
@@ -38,10 +44,9 @@ internal class KotlinPsiReferenceRegistrar {
         }
     }
 
-    inline fun <reified E : KtElement> registerMultiProvider(crossinline factory: (E) -> Array<PsiReference>) {
+    inline fun <reified E : KtElement>  registerMultiProvider(crossinline factory: (E) -> Array<PsiReference>) {
         val provider: KotlinPsiReferenceProvider = object : KotlinPsiReferenceProvider {
             override fun getReferencesByElement(element: PsiElement): Array<PsiReference> {
-                @Suppress("UNCHECKED_CAST")
                 return factory(element as E)
             }
         }
@@ -58,15 +63,13 @@ class KtIdeReferenceProviderService : KotlinReferenceProvidersService() {
     private val originalProvidersBinding: MultiMap<Class<out PsiElement>, KotlinPsiReferenceProvider>
     private val providersBindingCache: Map<Class<out PsiElement>, List<KotlinPsiReferenceProvider>>
 
-    private val referenceContributors = listOf(KotlinReferenceContributor(), KotlinDefaultAnnotationMethodImplicitReferenceContributor())
-
     init {
         val registrar = KotlinPsiReferenceRegistrar()
-        referenceContributors.forEach { it.registerReferenceProviders(registrar) }
+        KotlinReferenceProviderContributor.getInstance().registerReferenceProviders(registrar)
         originalProvidersBinding = registrar.providers
 
         providersBindingCache = ConcurrentFactoryMap.createMap<Class<out PsiElement>, List<KotlinPsiReferenceProvider>> { klass ->
-            val result = ContainerUtil.newSmartList<KotlinPsiReferenceProvider>()
+            val result = SmartList<KotlinPsiReferenceProvider>()
             for (bindingClass in originalProvidersBinding.keySet()) {
                 if (bindingClass.isAssignableFrom(klass)) {
                     result.addAll(originalProvidersBinding.get(bindingClass))

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/references/KtInvokeFunctionReference.kt

@@ -1,17 +1,6 @@
 /*
- * Copyright 2010-2015 JetBrains s.r.o.
+ * 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.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
  */
 
 package org.jetbrains.kotlin.idea.references
@@ -20,40 +9,20 @@ import com.intellij.lang.ASTNode
 import com.intellij.openapi.util.TextRange
 import com.intellij.psi.MultiRangeReference
 import com.intellij.psi.PsiElement
-import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.getQualifiedExpressionForSelectorOrThis
-import org.jetbrains.kotlin.resolve.BindingContext
-import org.jetbrains.kotlin.resolve.calls.callUtil.getCall
-import org.jetbrains.kotlin.resolve.calls.callUtil.getResolvedCall
-import org.jetbrains.kotlin.resolve.calls.model.VariableAsFunctionResolvedCall
 import org.jetbrains.kotlin.util.OperatorNameConventions
 import java.util.*
 
-class KtInvokeFunctionReference(expression: KtCallExpression) : KtSimpleReference<KtCallExpression>(expression), MultiRangeReference {
+abstract class KtInvokeFunctionReference(expression: KtCallExpression) : KtSimpleReference<KtCallExpression>(expression), MultiRangeReference {
-
+    override val resolvesByNames: Collection<Name> get() = NAMES
-    override val resolvesByNames: Collection<Name>
-        get() = NAMES
 
     override fun getRangeInElement(): TextRange {
         return element.textRange.shiftRight(-element.textOffset)
     }
 
-    override fun getTargetDescriptors(context: BindingContext): Collection<DeclarationDescriptor> {
-        val call = element.getCall(context)
-        val resolvedCall = call.getResolvedCall(context)
-        return when {
-            resolvedCall is VariableAsFunctionResolvedCall ->
-                setOf<DeclarationDescriptor>((resolvedCall as VariableAsFunctionResolvedCall).functionCall.candidateDescriptor)
-            call != null && resolvedCall != null && call.callType == Call.CallType.INVOKE ->
-                setOf<DeclarationDescriptor>(resolvedCall.candidateDescriptor)
-            else ->
-                emptyList()
-        }
-    }
-
     override fun getRanges(): List<TextRange> {
         val list = ArrayList<TextRange>()
         val valueArgumentList = expression.valueArgumentList
@@ -111,11 +80,12 @@ class KtInvokeFunctionReference(expression: KtCallExpression) : KtSimpleReferenc
             return fullCallExpression.replace(arrayAccessExpression)
         }
 
-        return renameImplicitConventionalCall(newElementName)
+        return doRenameImplicitConventionalCall(newElementName)
     }
 
-    companion object {
+    protected abstract fun doRenameImplicitConventionalCall(newName: String?): KtExpression
 
+    companion object {
         private val NAMES = listOf(OperatorNameConventions.INVOKE)
     }
 }

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/references/KtPropertyDelegationMethodsReference.kt

@@ -0,0 +1,29 @@
+/*
+ * 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.idea.references
+
+import com.intellij.openapi.util.TextRange
+import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.psi.KtPropertyDelegate
+import org.jetbrains.kotlin.util.OperatorNameConventions
+
+abstract class KtPropertyDelegationMethodsReference(element: KtPropertyDelegate) : KtMultiReference<KtPropertyDelegate>(element) {
+    override fun getRangeInElement(): TextRange {
+        val byKeywordNode = expression.byKeywordNode
+        val offset = byKeywordNode.psi!!.startOffsetInParent
+        return TextRange(offset, offset + byKeywordNode.textLength)
+    }
+
+       override val resolvesByNames: Collection<Name> get() = NAMES
+
+    companion object {
+        private val NAMES = listOf(
+            OperatorNameConventions.GET_VALUE,
+            OperatorNameConventions.SET_VALUE,
+            OperatorNameConventions.PROVIDE_DELEGATE
+        )
+    }
+}

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/references/KtReference.kt

@@ -0,0 +1,47 @@
+/*
+ * 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.idea.references
+
+import com.intellij.psi.*
+import com.intellij.psi.impl.source.resolve.ResolveCache
+import com.intellij.util.IncorrectOperationException
+import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.psi.KtElement
+import org.jetbrains.kotlin.psi.KtReferenceExpression
+
+interface KtReference : PsiPolyVariantReference {
+    val resolver: ResolveCache.PolyVariantResolver<KtReference>
+
+    override fun getElement(): KtElement
+
+    val resolvesByNames: Collection<Name>
+}
+
+abstract class AbstractKtReference<T : KtElement>(element: T) : PsiPolyVariantReferenceBase<T>(element), KtReference {
+    val expression: T
+        get() = element
+
+    override fun multiResolve(incompleteCode: Boolean): Array<ResolveResult> =
+        ResolveCache.getInstance(expression.project).resolveWithCaching(this, resolver, false, incompleteCode)
+
+    override fun getCanonicalText(): String = "<TBD>"
+
+    open fun canRename(): Boolean = false
+    override fun handleElementRename(newElementName: String): PsiElement? = throw IncorrectOperationException()
+
+    override fun bindToElement(element: PsiElement): PsiElement = throw IncorrectOperationException()
+
+    @Suppress("UNCHECKED_CAST")
+    override fun getVariants(): Array<Any> = PsiReference.EMPTY_ARRAY as Array<Any>
+
+    override fun isSoft(): Boolean = false
+
+    override fun toString() = this::class.java.simpleName + ": " + expression.text
+}
+
+abstract class KtSimpleReference<T : KtReferenceExpression>(expression: T) : AbstractKtReference<T>(expression)
+
+abstract class KtMultiReference<T : KtElement>(expression: T) : AbstractKtReference<T>(expression)

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/references/KtSimpleNameReference.kt

@@ -0,0 +1,97 @@
+/*
+ * 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.idea.references
+
+import com.intellij.openapi.extensions.Extensions
+import com.intellij.openapi.util.TextRange
+import com.intellij.psi.PsiElement
+import com.intellij.psi.PsiReference
+import org.jetbrains.kotlin.lexer.KtTokens
+import org.jetbrains.kotlin.name.FqName
+import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.plugin.references.SimpleNameReferenceExtension
+import org.jetbrains.kotlin.psi.*
+import org.jetbrains.kotlin.psi.psiUtil.getParentOfTypeAndBranch
+import org.jetbrains.kotlin.psi.psiUtil.startOffset
+import org.jetbrains.kotlin.types.expressions.OperatorConventions
+
+abstract class KtSimpleNameReference(expression: KtSimpleNameExpression) : KtSimpleReference<KtSimpleNameExpression>(expression) {
+    override fun isReferenceTo(element: PsiElement): Boolean {
+        if (!doCanBeReferenceTo(element)) return false
+
+
+        @Suppress("DEPRECATION") // compatibility with 191
+        for (extension in Extensions.getArea(element.project).getExtensionPoint(SimpleNameReferenceExtension.EP_NAME).extensions) {
+            if (extension.isReferenceTo(this, element)) return true
+        }
+
+        return super.isReferenceTo(element)
+    }
+
+    protected abstract fun doCanBeReferenceTo(candidateTarget: PsiElement): Boolean
+
+    override fun getRangeInElement(): TextRange {
+        val element = element.getReferencedNameElement()
+        val startOffset = getElement().startOffset
+        return element.textRange.shiftRight(-startOffset)
+    }
+
+    override fun canRename(): Boolean {
+        if (expression.getParentOfTypeAndBranch<KtWhenConditionInRange>(strict = true) { operationReference } != null) return false
+
+        val elementType = expression.getReferencedNameElementType()
+        if (elementType == KtTokens.PLUSPLUS || elementType == KtTokens.MINUSMINUS) return false
+
+        return true
+    }
+
+   abstract override fun handleElementRename(newElementName: String): PsiElement?
+
+    enum class ShorteningMode {
+        NO_SHORTENING,
+        DELAYED_SHORTENING,
+        FORCED_SHORTENING
+    }
+
+    // By default reference binding is delayed
+    override fun bindToElement(element: PsiElement): PsiElement =
+        bindToElement(element, ShorteningMode.DELAYED_SHORTENING)
+
+    abstract fun bindToElement(element: PsiElement, shorteningMode: ShorteningMode): PsiElement
+
+    abstract fun bindToFqName(
+        fqName: FqName,
+        shorteningMode: ShorteningMode = ShorteningMode.DELAYED_SHORTENING,
+        targetElement: PsiElement? = null
+    ): PsiElement
+
+    override fun getCanonicalText(): String = expression.text
+
+    override val resolvesByNames: Collection<Name>
+        get() {
+            val element = element
+
+            if (element is KtOperationReferenceExpression) {
+                val tokenType = element.operationSignTokenType
+                if (tokenType != null) {
+                    val name = OperatorConventions.getNameForOperationSymbol(
+                        tokenType, element.parent is KtUnaryExpression, element.parent is KtBinaryExpression
+                    ) ?: return emptyList()
+                    val counterpart = OperatorConventions.ASSIGNMENT_OPERATION_COUNTERPARTS[tokenType]
+                    return if (counterpart != null) {
+                        val counterpartName = OperatorConventions.getNameForOperationSymbol(counterpart, false, true)!!
+                        listOf(name, counterpartName)
+                    } else {
+                        listOf(name)
+                    }
+                }
+            }
+
+            return listOf(element.getReferencedNameAsName())
+        }
+
+    abstract fun getImportAlias(): KtImportAlias?
+}

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/references/ReadWriteAccessChecker.kt

@@ -0,0 +1,66 @@
+/*
+ * 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.idea.references
+
+import com.intellij.openapi.components.service
+import org.jetbrains.kotlin.lexer.KtTokens
+import org.jetbrains.kotlin.psi.*
+import org.jetbrains.kotlin.psi.psiUtil.getAssignmentByLHS
+import org.jetbrains.kotlin.psi.psiUtil.getQualifiedExpressionForSelectorOrThis
+import org.jetbrains.kotlin.utils.addToStdlib.constant
+
+interface ReadWriteAccessChecker {
+    fun readWriteAccessWithFullExpressionByResolve(assignment: KtBinaryExpression): Pair<ReferenceAccess, KtExpression>? = null
+
+    fun readWriteAccessWithFullExpression(
+        targetExpression: KtExpression,
+        useResolveForReadWrite: Boolean
+    ): Pair<ReferenceAccess, KtExpression> {
+        var expression = targetExpression.getQualifiedExpressionForSelectorOrThis()
+        loop@ while (true) {
+            when (val parent = expression.parent) {
+                is KtParenthesizedExpression, is KtAnnotatedExpression, is KtLabeledExpression -> expression = parent as KtExpression
+                else -> break@loop
+            }
+        }
+
+        val assignment = expression.getAssignmentByLHS()
+        if (assignment != null) {
+            when (assignment.operationToken) {
+                KtTokens.EQ -> return ReferenceAccess.WRITE to assignment
+
+                else -> {
+                    return (
+                            if (useResolveForReadWrite) readWriteAccessWithFullExpressionByResolve(assignment)
+                            else null
+                            ) ?: ReferenceAccess.READ_WRITE to assignment
+                }
+            }
+        }
+
+        val unaryExpression = expression.parent as? KtUnaryExpression
+        return if (unaryExpression != null && unaryExpression.operationToken in constant { setOf(KtTokens.PLUSPLUS, KtTokens.MINUSMINUS) })
+            ReferenceAccess.READ_WRITE to unaryExpression
+        else
+            ReferenceAccess.READ to expression
+    }
+
+    companion object {
+        fun getInstance(): ReadWriteAccessChecker = service()
+    }
+}
+
+enum class ReferenceAccess(val isRead: Boolean, val isWrite: Boolean) {
+    READ(true, false), WRITE(false, true), READ_WRITE(true, true)
+}
+
+fun KtExpression.readWriteAccess(useResolveForReadWrite: Boolean) =
+    readWriteAccessWithFullExpression(useResolveForReadWrite).first
+
+fun KtExpression.readWriteAccessWithFullExpression(useResolveForReadWrite: Boolean): Pair<ReferenceAccess, KtExpression> =
+    ReadWriteAccessChecker.getInstance().readWriteAccessWithFullExpression(this, useResolveForReadWrite)
+
+

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/references/SyntheticPropertyAccessorReference.kt

@@ -0,0 +1,42 @@
+/*
+ * 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.idea.references
+
+import com.intellij.openapi.util.TextRange
+import com.intellij.psi.PsiElement
+import com.intellij.psi.PsiMethod
+import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.psi.KtNameReferenceExpression
+
+abstract class SyntheticPropertyAccessorReference(
+    expression: KtNameReferenceExpression,
+    val getter: Boolean
+) : KtSimpleReference<KtNameReferenceExpression>(expression) {
+
+    override fun isReferenceTo(element: PsiElement): Boolean {
+        if (element !is PsiMethod || !isAccessorName(element.name)) return false
+        if (!getter && expression.readWriteAccess(true) == ReferenceAccess.READ) return false
+        return additionalIsReferenceToChecker(element)
+    }
+
+    protected abstract fun additionalIsReferenceToChecker(element: PsiElement): Boolean
+
+    private fun isAccessorName(name: String): Boolean {
+        if (getter) {
+            return name.startsWith("get") || name.startsWith("is")
+        }
+        return name.startsWith("set")
+    }
+
+    override fun getRangeInElement() = TextRange(0, expression.textLength)
+
+    override fun canRename() = true
+
+    abstract override fun handleElementRename(newElementName: String): PsiElement?
+
+    override val resolvesByNames: Collection<Name>
+        get() = listOf(element.getReferencedNameAsName())
+}

idea/idea-frontend-independent/src/org/jetbrains/kotlin/plugin/references/SimpleNameReferenceExtension.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 

idea/idea-jvm/src/org/jetbrains/kotlin/idea/injection/KotlinLanguageInjector.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -39,6 +39,7 @@ import org.jetbrains.kotlin.idea.core.util.runInReadActionWithWriteActionPriorit
 import org.jetbrains.kotlin.idea.patterns.KotlinFunctionPattern
 import org.jetbrains.kotlin.idea.references.KtReference
 import org.jetbrains.kotlin.idea.references.mainReference
+import org.jetbrains.kotlin.idea.references.resolveToDescriptors
 import org.jetbrains.kotlin.idea.search.usagesSearch.descriptor
 import org.jetbrains.kotlin.idea.util.ProjectRootsUtil
 import org.jetbrains.kotlin.lexer.KtTokens

idea/resources/META-INF/plugin-common.xml

@@ -171,6 +171,12 @@
     <applicationService serviceInterface="org.jetbrains.kotlin.idea.caches.FileAttributeService"
                         serviceImplementation="org.jetbrains.kotlin.idea.caches.FileAttributeServiceImpl"/>
 
+    <applicationService serviceInterface="org.jetbrains.kotlin.idea.references.ReadWriteAccessChecker"
+                        serviceImplementation="org.jetbrains.kotlin.idea.references.ReadWriteAccessCheckerDescriptorsImpl"/>
+
+   <applicationService serviceInterface="org.jetbrains.kotlin.idea.references.KotlinReferenceProviderContributor"
+                        serviceImplementation="org.jetbrains.kotlin.idea.references.KotlinReferenceContributor"/>
+
     <applicationService serviceImplementation="org.jetbrains.kotlin.idea.KotlinPluginUpdater"/>
 
     <applicationService serviceInterface="org.jetbrains.kotlin.psi.KotlinDeclarationNavigationPolicy"

idea/src/org/jetbrains/kotlin/idea/imports/KotlinImportOptimizer.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -20,10 +20,7 @@ import org.jetbrains.kotlin.idea.caches.project.getNullableModuleInfo
 import org.jetbrains.kotlin.idea.caches.resolve.analyze
 import org.jetbrains.kotlin.idea.caches.resolve.getResolutionFacade
 import org.jetbrains.kotlin.idea.core.formatter.KotlinCodeStyleSettings
-import org.jetbrains.kotlin.idea.references.KtInvokeFunctionReference
+import org.jetbrains.kotlin.idea.references.*
-import org.jetbrains.kotlin.idea.references.KtReference
-import org.jetbrains.kotlin.idea.references.canBeResolvedViaImport
-import org.jetbrains.kotlin.idea.references.mainReference
 import org.jetbrains.kotlin.idea.util.getResolutionScope
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation
 import org.jetbrains.kotlin.name.FqName

idea/src/org/jetbrains/kotlin/idea/intentions/Utils.kt

@@ -1,17 +1,6 @@
 /*
- * Copyright 2010-2015 JetBrains s.r.o.
+ * 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.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
  */
 
 package org.jetbrains.kotlin.idea.intentions
@@ -35,8 +24,8 @@ import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.containingClass
 import org.jetbrains.kotlin.psi.psiUtil.getCallNameExpression
 import org.jetbrains.kotlin.psi.psiUtil.getStrictParentOfType
+import org.jetbrains.kotlin.resolve.ArrayFqNames
 import org.jetbrains.kotlin.resolve.BindingContext
-import org.jetbrains.kotlin.resolve.CollectionLiteralResolver
 import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
 import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameUnsafe
 import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
@@ -294,8 +283,8 @@ fun KtDotQualifiedExpression.deleteFirstReceiver(): KtExpression {
     return this
 }
 
-private val ARRAY_OF_METHODS = setOf(CollectionLiteralResolver.ARRAY_OF_FUNCTION) +
+private val ARRAY_OF_METHODS = setOf(ArrayFqNames.ARRAY_OF_FUNCTION) +
-        CollectionLiteralResolver.PRIMITIVE_TYPE_TO_ARRAY.values.toSet() +
+        ArrayFqNames.PRIMITIVE_TYPE_TO_ARRAY.values.toSet() +
         Name.identifier("emptyArray")
 
 fun KtCallExpression.isArrayOfMethod(): Boolean {

idea/src/org/jetbrains/kotlin/idea/quickfix/SurroundWithArrayOfWithSpreadOperatorInFunctionFix.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -14,8 +14,7 @@ import org.jetbrains.kotlin.idea.KotlinBundle
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.getParentOfType
-import org.jetbrains.kotlin.resolve.CollectionLiteralResolver.Companion.ARRAY_OF_FUNCTION
+import org.jetbrains.kotlin.resolve.ArrayFqNames
-import org.jetbrains.kotlin.resolve.CollectionLiteralResolver.Companion.PRIMITIVE_TYPE_TO_ARRAY
 
 class SurroundWithArrayOfWithSpreadOperatorInFunctionFix(
     val wrapper: Name,
@@ -52,7 +51,7 @@ class SurroundWithArrayOfWithSpreadOperatorInFunctionFix(
 
             val parameterType = actualDiagnostic.a
 
-            val wrapper = PRIMITIVE_TYPE_TO_ARRAY[KotlinBuiltIns.getPrimitiveArrayElementType(parameterType)] ?: ARRAY_OF_FUNCTION
+            val wrapper = ArrayFqNames.PRIMITIVE_TYPE_TO_ARRAY[KotlinBuiltIns.getPrimitiveArrayElementType(parameterType)] ?: ArrayFqNames.ARRAY_OF_FUNCTION
             return SurroundWithArrayOfWithSpreadOperatorInFunctionFix(wrapper, actualDiagnostic.psiElement)
         }
     }

idea/src/org/jetbrains/kotlin/idea/refactoring/changeSignature/KotlinParameterInfo.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -16,6 +16,7 @@ import org.jetbrains.kotlin.idea.core.setDefaultValue
 import org.jetbrains.kotlin.idea.refactoring.changeSignature.usages.KotlinCallableDefinitionUsage
 import org.jetbrains.kotlin.idea.references.KtReference
 import org.jetbrains.kotlin.idea.references.mainReference
+import org.jetbrains.kotlin.idea.references.resolveToDescriptors
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.addRemoveModifier.setModifierList
 import org.jetbrains.kotlin.psi.psiUtil.quoteIfNeeded

idea/src/org/jetbrains/kotlin/idea/refactoring/pullUp/pullUpConflictsUtils.kt

@@ -1,17 +1,6 @@
 /*
- * Copyright 2010-2015 JetBrains s.r.o.
+ * 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.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
  */
 
 package org.jetbrains.kotlin.idea.refactoring.pullUp
@@ -33,6 +22,7 @@ import org.jetbrains.kotlin.idea.refactoring.memberInfo.getChildrenToAnalyze
 import org.jetbrains.kotlin.idea.refactoring.memberInfo.resolveToDescriptorWrapperAware
 import org.jetbrains.kotlin.idea.references.KtReference
 import org.jetbrains.kotlin.idea.references.mainReference
+import org.jetbrains.kotlin.idea.references.resolveToDescriptors
 import org.jetbrains.kotlin.idea.resolve.ResolutionFacade
 import org.jetbrains.kotlin.idea.search.declarationsSearch.HierarchySearchRequest
 import org.jetbrains.kotlin.idea.search.declarationsSearch.searchInheritors

idea/src/org/jetbrains/kotlin/idea/refactoring/pushDown/pushDownConflictsUtils.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -18,6 +18,7 @@ import org.jetbrains.kotlin.idea.refactoring.memberInfo.KtPsiClassWrapper
 import org.jetbrains.kotlin.idea.refactoring.pullUp.renderForConflicts
 import org.jetbrains.kotlin.idea.references.KtReference
 import org.jetbrains.kotlin.idea.references.mainReference
+import org.jetbrains.kotlin.idea.references.resolveToDescriptors
 import org.jetbrains.kotlin.idea.resolve.ResolutionFacade
 import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.psi.*

idea/src/org/jetbrains/kotlin/idea/refactoring/rename/KotlinAwareJavaGetterRenameProcessor.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -13,9 +13,11 @@ import com.intellij.psi.search.SearchScope
 import com.intellij.refactoring.rename.RenameJavaMethodProcessor
 import org.jetbrains.kotlin.asJava.elements.KtLightMethod
 import org.jetbrains.kotlin.idea.references.SyntheticPropertyAccessorReference
+import org.jetbrains.kotlin.idea.references.SyntheticPropertyAccessorReferenceDescriptorImpl
 import org.jetbrains.kotlin.load.java.JvmAbi
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.synthetic.SyntheticJavaPropertyDescriptor
+import org.jetbrains.kotlin.utils.addToStdlib.filterIsInstanceWithChecker
 import org.jetbrains.kotlin.utils.ifEmpty
 
 class KotlinAwareJavaGetterRenameProcessor : RenameJavaMethodProcessor() {
@@ -38,12 +40,12 @@ class KotlinAwareJavaGetterRenameProcessor : RenameJavaMethodProcessor() {
             .filter { it.parameters.size == 1 && it.returnType == PsiType.VOID }
             .flatMap {
                 super.findReferences(it, searchScope, searchInCommentsAndStrings)
-                    .filterIsInstance<SyntheticPropertyAccessorReference.Setter>()
+                    .filterIsInstanceWithChecker<SyntheticPropertyAccessorReference> { !it.getter }
             }
             .ifEmpty { return getterReferences }
         return ArrayList<PsiReference>(getterReferences.size + setterReferences.size).apply {
             addAll(getterReferences)
-            setterReferences.mapTo(this) { SyntheticPropertyAccessorReference.Getter(it.expression) }
+            setterReferences.mapTo(this) { SyntheticPropertyAccessorReferenceDescriptorImpl(it.expression, getter = true) }
         }
     }
 }

idea/src/org/jetbrains/kotlin/idea/search/ideaExtensions/KotlinOverridingMethodReferenceSearcher.kt

@@ -1,17 +1,6 @@
 /*
- * Copyright 2010-2015 JetBrains s.r.o.
+ * 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.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
  */
 
 package org.jetbrains.kotlin.idea.search.ideaExtensions
@@ -94,7 +83,7 @@ class KotlinOverridingMethodReferenceSearcher : MethodUsagesSearcher() {
                         return readWriteAccess.isRead != isGetter && readWriteAccess.isWrite == isGetter
                     }
                     if (ref is SyntheticPropertyAccessorReference) {
-                        return (ref is SyntheticPropertyAccessorReference.Getter) != isGetter
+                        return ref.getter != isGetter
                     }
                     return false
                 }

nj2k/src/org/jetbrains/kotlin/nj2k/conversions/ArrayInitializerConversion.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -12,9 +12,7 @@ import org.jetbrains.kotlin.nj2k.NewJ2kConverterContext
 import org.jetbrains.kotlin.nj2k.toArgumentList
 import org.jetbrains.kotlin.nj2k.tree.*
 import org.jetbrains.kotlin.nj2k.types.*
-
+import org.jetbrains.kotlin.resolve.ArrayFqNames
-import org.jetbrains.kotlin.resolve.CollectionLiteralResolver
-
 
 class ArrayInitializerConversion(context: NewJ2kConverterContext) : RecursiveApplicableConversionBase(context) {
     override fun applyToElement(element: JKTreeElement): JKTreeElement {
@@ -23,9 +21,9 @@ class ArrayInitializerConversion(context: NewJ2kConverterContext) : RecursiveApp
             val primitiveArrayType = element.type.type as? JKJavaPrimitiveType
             val arrayConstructorName =
                 if (primitiveArrayType != null)
-                    CollectionLiteralResolver.PRIMITIVE_TYPE_TO_ARRAY[PrimitiveType.valueOf(primitiveArrayType.jvmPrimitiveType.name)]!!.asString()
+                    ArrayFqNames.PRIMITIVE_TYPE_TO_ARRAY[PrimitiveType.valueOf(primitiveArrayType.jvmPrimitiveType.name)]!!.asString()
                 else
-                    CollectionLiteralResolver.ARRAY_OF_FUNCTION.asString()
+                    ArrayFqNames.ARRAY_OF_FUNCTION.asString()
             val typeArguments =
                 if (primitiveArrayType == null) JKTypeArgumentList(listOf(element::type.detached()))
                 else JKTypeArgumentList()

prepare/idea-plugin/build.gradle.kts

@@ -93,6 +93,7 @@ val projectsToShadow by extra(listOf(
         ":idea:idea-jvm",
         ":idea:idea-git",
         ":idea:idea-jps-common",
+        ":idea:idea-frontend-independent",
         *if (Ide.IJ())
             arrayOf(
                 ":idea:idea-maven",

settings.gradle

@@ -183,6 +183,7 @@ include ":kotlin-build-common",
         ":idea:jvm-debugger:jvm-debugger-coroutine",
         ":idea:jvm-debugger:jvm-debugger-test",
         ":idea:scripting-support",
+        ":idea:idea-frontend-independent",
         ":libraries:tools:new-project-wizard",
         ":idea:idea-new-project-wizard",
         ":libraries:tools:new-project-wizard:new-project-wizard-cli",