KT-8574 'Convert to block body' inserts spurious < token

#KT-8574 Fixed

idea/ide-common/src/org/jetbrains/kotlin/idea/util/IdeDescriptorRenderers.kt

@@ -16,17 +16,34 @@
 
 package org.jetbrains.kotlin.idea.util
 
+import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.renderer.DescriptorRenderer
 import org.jetbrains.kotlin.renderer.DescriptorRendererModifier
 import org.jetbrains.kotlin.renderer.NameShortness
 import org.jetbrains.kotlin.renderer.OverrideRenderingPolicy
 import org.jetbrains.kotlin.types.JetType
+import org.jetbrains.kotlin.types.isDynamic
 
 public object IdeDescriptorRenderers {
     public val APPROXIMATE_FLEXIBLE_TYPES: (JetType) -> JetType = { approximateFlexibleTypes(it, true) }
 
     public val APPROXIMATE_FLEXIBLE_TYPES_IN_ARGUMENTS: (JetType) -> JetType = { approximateFlexibleTypes(it, false) }
 
+    private fun unwrapAnonymousType(type: JetType): JetType {
+        if (type.isDynamic()) return type
+
+        val classifier = type.constructor.declarationDescriptor
+        if (classifier != null && !classifier.name.isSpecial) return type
+
+        type.constructor.supertypes.singleOrNull()?.let { return it }
+
+        val builtIns = KotlinBuiltIns.getInstance()
+        return if (type.isMarkedNullable)
+            builtIns.nullableAnyType
+        else
+            builtIns.anyType
+    }
+
     private val BASE: DescriptorRenderer = DescriptorRenderer.withOptions {
         normalizedVisibilities = true
         withDefinedIn = false
@@ -38,16 +55,16 @@ public object IdeDescriptorRenderers {
 
     public val SOURCE_CODE: DescriptorRenderer = BASE.withOptions {
         nameShortness = NameShortness.SOURCE_CODE_QUALIFIED
-        typeNormalizer = APPROXIMATE_FLEXIBLE_TYPES
+        typeNormalizer = { APPROXIMATE_FLEXIBLE_TYPES(unwrapAnonymousType(it)) }
     }
 
     public val SOURCE_CODE_FOR_TYPE_ARGUMENTS: DescriptorRenderer = BASE.withOptions {
         nameShortness = NameShortness.SOURCE_CODE_QUALIFIED
-        typeNormalizer = APPROXIMATE_FLEXIBLE_TYPES_IN_ARGUMENTS
+        typeNormalizer = { APPROXIMATE_FLEXIBLE_TYPES_IN_ARGUMENTS(unwrapAnonymousType(it)) }
     }
 
     public val SOURCE_CODE_SHORT_NAMES_IN_TYPES: DescriptorRenderer = BASE.withOptions {
         nameShortness = NameShortness.SHORT
-        typeNormalizer = APPROXIMATE_FLEXIBLE_TYPES
+        typeNormalizer = { APPROXIMATE_FLEXIBLE_TYPES(unwrapAnonymousType(it)) }
     }
 }

idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/extractionEngine/extractableAnalysisUtil.kt

@@ -62,6 +62,7 @@ import org.jetbrains.kotlin.idea.util.approximateWithResolvableType
 import org.jetbrains.kotlin.idea.util.isResolvableInScope
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.*
+import org.jetbrains.kotlin.renderer.DescriptorRenderer
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils
 import org.jetbrains.kotlin.resolve.bindingContextUtil.isUsedAsStatement
@@ -87,8 +88,11 @@ private val DEFAULT_PARAMETER_TYPE = KotlinBuiltIns.getInstance().getNullableAny
 private fun DeclarationDescriptor.renderForMessage(): String =
         IdeDescriptorRenderers.SOURCE_CODE_SHORT_NAMES_IN_TYPES.render(this)
 
-private fun JetType.renderForMessage(): String =
+private val TYPE_RENDERER = DescriptorRenderer.FQ_NAMES_IN_TYPES.withOptions {
-        IdeDescriptorRenderers.SOURCE_CODE.renderType(this)
+    typeNormalizer = IdeDescriptorRenderers.APPROXIMATE_FLEXIBLE_TYPES
+}
+
+private fun JetType.renderForMessage(): String = TYPE_RENDERER.renderType(this)
 
 private fun JetDeclaration.renderForMessage(bindingContext: BindingContext): String? =
     bindingContext[BindingContext.DECLARATION_TO_DESCRIPTOR, this]?.renderForMessage()

idea/testData/intentions/convertToBlockBody/valueIsAnonymousObject.kt

@@ -0,0 +1 @@
+fun f() = <caret>object {  }

idea/testData/intentions/convertToBlockBody/valueIsAnonymousObject.kt.after

@@ -0,0 +1,3 @@
+fun f(): Any {
+    return object {  }
+}

idea/testData/intentions/convertToBlockBody/valueIsAnonymousObject2.kt

@@ -0,0 +1,3 @@
+interface I
+
+fun f() = <caret>object : I { }

idea/testData/intentions/convertToBlockBody/valueIsAnonymousObject2.kt.after

@@ -0,0 +1,5 @@
+interface I
+
+fun f(): I {
+    return object : I { }
+}

idea/testData/intentions/convertToBlockBody/valueIsAnonymousObject3.kt

@@ -0,0 +1,6 @@
+interface I1
+interface I2
+
+fun f() {
+    fun g() = <caret>object : I1, I2 { }
+}

idea/testData/intentions/convertToBlockBody/valueIsAnonymousObject3.kt.after

@@ -0,0 +1,8 @@
+interface I1
+interface I2
+
+fun f() {
+    fun g(): Any {
+        return object : I1, I2 { }
+    }
+}

idea/testData/intentions/convertToBlockBody/valueIsAnonymousObject4.kt

@@ -0,0 +1,5 @@
+// WITH_RUNTIME
+
+interface I
+
+fun f() = <caret>listOf(object : I { })

idea/testData/intentions/convertToBlockBody/valueIsAnonymousObject4.kt.after

@@ -0,0 +1,7 @@
+// WITH_RUNTIME
+
+interface I
+
+fun f(): List<I> {
+    return listOf(object : I { })
+}

idea/tests/org/jetbrains/kotlin/idea/intentions/IntentionTestGenerated.java

@@ -3810,6 +3810,30 @@ public class IntentionTestGenerated extends AbstractIntentionTest {
             String fileName = JetTestUtils.navigationMetadata("idea/testData/intentions/convertToBlockBody/setter.kt");
             doTest(fileName);
         }
+
+        @TestMetadata("valueIsAnonymousObject.kt")
+        public void testValueIsAnonymousObject() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/intentions/convertToBlockBody/valueIsAnonymousObject.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("valueIsAnonymousObject2.kt")
+        public void testValueIsAnonymousObject2() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/intentions/convertToBlockBody/valueIsAnonymousObject2.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("valueIsAnonymousObject3.kt")
+        public void testValueIsAnonymousObject3() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/intentions/convertToBlockBody/valueIsAnonymousObject3.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("valueIsAnonymousObject4.kt")
+        public void testValueIsAnonymousObject4() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/intentions/convertToBlockBody/valueIsAnonymousObject4.kt");
+            doTest(fileName);
+        }
     }
 
     @TestMetadata("idea/testData/intentions/convertToConcatenatedString")