Introduce Variable: Avoid explicit types for expression of anonymous type

#KT-12078 Fixed

idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceVariable/KotlinIntroduceVariableHandler.kt

@@ -49,7 +49,6 @@ import org.jetbrains.kotlin.idea.refactoring.*
 import org.jetbrains.kotlin.idea.refactoring.introduce.*
 import org.jetbrains.kotlin.idea.resolve.ResolutionFacade
 import org.jetbrains.kotlin.idea.util.IdeDescriptorRenderers
-import org.jetbrains.kotlin.idea.core.ShortenReferences
 import org.jetbrains.kotlin.idea.util.application.executeCommand
 import org.jetbrains.kotlin.idea.util.application.executeWriteCommand
 import org.jetbrains.kotlin.idea.util.application.runWriteAction
@@ -67,7 +66,10 @@ import org.jetbrains.kotlin.resolve.bindingContextUtil.isUsedAsExpression
 import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
 import org.jetbrains.kotlin.resolve.source.getPsi
 import org.jetbrains.kotlin.types.KotlinType
+import org.jetbrains.kotlin.types.TypeConstructor
 import org.jetbrains.kotlin.types.checker.KotlinTypeChecker
+import org.jetbrains.kotlin.types.checker.NewKotlinTypeChecker
+import org.jetbrains.kotlin.types.checker.TypeCheckerContext
 import org.jetbrains.kotlin.utils.addIfNotNull
 import org.jetbrains.kotlin.utils.ifEmpty
 import org.jetbrains.kotlin.utils.sure
@@ -82,6 +84,20 @@ object KotlinIntroduceVariableHandler : RefactoringActionHandler {
 
     private var KtExpression.isOccurrence: Boolean by NotNullablePsiCopyableUserDataProperty(Key.create("OCCURRENCE"), false)
 
+    private class TypeCheckerImpl(private val project: Project) : KotlinTypeChecker by KotlinTypeChecker.DEFAULT {
+        private inner class ContextImpl : TypeCheckerContext(false) {
+            override fun areEqualTypeConstructors(a: TypeConstructor, b: TypeConstructor): Boolean {
+                return compareDescriptors(project, a.declarationDescriptor, b.declarationDescriptor)
+            }
+        }
+
+        override fun equalTypes(a: KotlinType, b: KotlinType): Boolean {
+            return with(NewKotlinTypeChecker) {
+                ContextImpl().equalTypes(a.unwrap(), b.unwrap())
+            }
+        }
+    }
+
     private class IntroduceVariableContext(
             private val expression: KtExpression,
             private val nameSuggestions: List<Collection<String>>,
@@ -495,8 +511,8 @@ object KotlinIntroduceVariableHandler : RefactoringActionHandler {
         val typeNoExpectedType = substringInfo?.type
                                  ?: physicalExpression.computeTypeInfoInContext(scope, physicalExpression, bindingTrace, dataFlowInfo).type
         val noTypeInference = expressionType != null
-                              && typeNoExpectedType != null
+                && typeNoExpectedType != null
-                              && !KotlinTypeChecker.DEFAULT.equalTypes(expressionType, typeNoExpectedType)
+                && !TypeCheckerImpl(project).equalTypes(expressionType, typeNoExpectedType)
 
         if (expressionType == null && bindingContext.get(BindingContext.QUALIFIER, physicalExpression) != null) {
             return showErrorHint(project, editor, KotlinRefactoringBundle.message("cannot.refactor.package.expression"))

idea/testData/refactoring/introduceVariable/AnonymousType.kt

@@ -0,0 +1,9 @@
+fun foo() {
+    bar(<selection>object: Runnable {
+        override fun run() {
+        }
+    }</selection>)
+}
+
+fun bar(runnable: Runnable) {
+}

idea/testData/refactoring/introduceVariable/AnonymousType.kt.after

@@ -0,0 +1,10 @@
+fun foo() {
+    val runnable = object : Runnable {
+        override fun run() {
+        }
+    }
+    bar(runnable)
+}
+
+fun bar(runnable: Runnable) {
+}

idea/tests/org/jetbrains/kotlin/idea/refactoring/introduce/ExtractionTestGenerated.java

@@ -27,6 +27,12 @@ public class ExtractionTestGenerated extends AbstractExtractionTest {
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/refactoring/introduceVariable"), Pattern.compile("^(.+)\\.(kt|kts)$"), TargetBackend.ANY, true);
         }
 
+        @TestMetadata("AnonymousType.kt")
+        public void testAnonymousType() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/introduceVariable/AnonymousType.kt");
+            doIntroduceVariableTest(fileName);
+        }
+
         @TestMetadata("ArrayAccessExpr.kt")
         public void testArrayAccessExpr() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/introduceVariable/ArrayAccessExpr.kt");