[cls] save parameter name for functional types in stub

to make it available for deserialized Fir

analysis/decompiled/decompiler-to-file-stubs/testData/additionalClsStubInfo/ParameterName/ParameterName.kt

@@ -0,0 +1,5 @@
+package test
+
+class ParameterName {
+    inline fun <A, B> foo(crossinline block: (input: A, state: B) -> Unit) {}
+}

analysis/decompiled/decompiler-to-file-stubs/testData/additionalClsStubInfo/ParameterName/ParameterName.txt

@@ -0,0 +1,39 @@
+PsiJetFileStubImpl[package=test]
+KotlinStub$PACKAGE_DIRECTIVE
+  KotlinStub$REFERENCE_EXPRESSION[referencedName=test]
+KotlinStub$IMPORT_LIST
+KotlinStub$CLASS[classId=test/ParameterName, fqName=test.ParameterName, isEnumEntry=false, isInterface=false, isLocal=false, isTopLevel=true, name=ParameterName, superNames=[]]
+  KotlinStub$MODIFIER_LIST[public final]
+  KotlinStub$PRIMARY_CONSTRUCTOR[fqName=null, hasBody=false, isDelegatedCallToThis=false, isExtension=false, isTopLevel=false, name=ParameterName]
+    KotlinStub$MODIFIER_LIST[public]
+    KotlinStub$VALUE_PARAMETER_LIST
+  KotlinStub$CLASS_BODY
+    KotlinStub$FUN[fqName=test.ParameterName.foo, hasBlockBody=true, hasBody=true, hasTypeParameterListBeforeFunctionName=true, isExtension=false, isTopLevel=false, mayHaveContract=false, name=foo]
+      KotlinStub$MODIFIER_LIST[public final inline]
+      KotlinStub$TYPE_PARAMETER_LIST
+        KotlinStub$TYPE_PARAMETER[fqName=null, isInVariance=false, isOutVariance=false, name=A]
+        KotlinStub$TYPE_PARAMETER[fqName=null, isInVariance=false, isOutVariance=false, name=B]
+      KotlinStub$VALUE_PARAMETER_LIST
+        KotlinStub$VALUE_PARAMETER[fqName=null, hasDefaultValue=false, hasValOrVar=false, isMutable=false, name=block]
+          KotlinStub$MODIFIER_LIST[crossinline]
+          KotlinStub$TYPE_REFERENCE
+            KotlinStub$FUNCTION_TYPE
+              KotlinStub$VALUE_PARAMETER_LIST
+                KotlinStub$VALUE_PARAMETER[fqName=null, hasDefaultValue=false, hasValOrVar=false, isMutable=false, name=null]   paramNameByAnnotation: input
+                  KotlinStub$TYPE_REFERENCE
+                    KotlinStub$USER_TYPE
+                      KotlinStub$REFERENCE_EXPRESSION[referencedName=A]
+                KotlinStub$VALUE_PARAMETER[fqName=null, hasDefaultValue=false, hasValOrVar=false, isMutable=false, name=null]   paramNameByAnnotation: state
+                  KotlinStub$TYPE_REFERENCE
+                    KotlinStub$USER_TYPE
+                      KotlinStub$REFERENCE_EXPRESSION[referencedName=B]
+              KotlinStub$TYPE_REFERENCE
+                KotlinStub$USER_TYPE
+                  KotlinStub$USER_TYPE
+                    KotlinStub$REFERENCE_EXPRESSION[referencedName=kotlin]
+                  KotlinStub$REFERENCE_EXPRESSION[referencedName=Unit]
+      KotlinStub$TYPE_REFERENCE
+        KotlinStub$USER_TYPE
+          KotlinStub$USER_TYPE
+            KotlinStub$REFERENCE_EXPRESSION[referencedName=kotlin]
+          KotlinStub$REFERENCE_EXPRESSION[referencedName=Unit]

analysis/decompiled/decompiler-to-file-stubs/tests/org/jetbrains/kotlin/analysis/decompiler/stub/files/AbstractAdditionalStubInfoTest.kt

@@ -60,6 +60,9 @@ abstract class AbstractAdditionalStubInfoTest : AbstractDecompiledClassTest() {
                         .append(arguments.entries.joinToString(", ", "(", ")") { "${it.key.asString()} = ${it.value}" })
                 }
             }
+            is KotlinParameterStubImpl -> {
+                stub.functionTypeParameterName?.let { builder.append("   paramNameByAnnotation: ").append(it) }
+            }
         }
         for (child in stub.childrenStubs) {
             builder.append("\n").append("  ".repeat(level))

analysis/decompiled/decompiler-to-file-stubs/tests/org/jetbrains/kotlin/analysis/decompiler/stub/files/AdditionalStubInfoTestGenerated.java

@@ -48,6 +48,12 @@ public class AdditionalStubInfoTestGenerated extends AbstractAdditionalStubInfoT
         runTest("analysis/decompiled/decompiler-to-file-stubs/testData/additionalClsStubInfo/OuterClassesWithFlexibleArgs/");
     }
 
+    @Test
+    @TestMetadata("ParameterName")
+    public void testParameterName() throws Exception {
+        runTest("analysis/decompiled/decompiler-to-file-stubs/testData/additionalClsStubInfo/ParameterName/");
+    }
+
     @Test
     @TestMetadata("PropertyInitializer")
     public void testPropertyInitializer() throws Exception {

analysis/decompiled/decompiler-to-stubs/src/org/jetbrains/kotlin/analysis/decompiler/stub/TypeClsStubBuilder.kt

@@ -7,6 +7,7 @@ import com.intellij.psi.stubs.StubElement
 import com.intellij.util.io.StringRef
 import org.jetbrains.kotlin.builtins.StandardNames
 import org.jetbrains.kotlin.builtins.isBuiltinFunctionClass
+import org.jetbrains.kotlin.constant.StringValue
 import org.jetbrains.kotlin.lexer.KtModifierKeywordToken
 import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.metadata.ProtoBuf
@@ -21,7 +22,6 @@ import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.name.SpecialNames
 import org.jetbrains.kotlin.protobuf.MessageLite
 import org.jetbrains.kotlin.psi.*
-import org.jetbrains.kotlin.psi.stubs.ConstantValueKind
 import org.jetbrains.kotlin.psi.stubs.KotlinUserTypeStub
 import org.jetbrains.kotlin.psi.stubs.elements.KtStubElementTypes
 import org.jetbrains.kotlin.psi.stubs.impl.*
@@ -37,7 +37,8 @@ class TypeClsStubBuilder(private val c: ClsStubBuilderContext) {
     fun createTypeReferenceStub(
         parent: StubElement<out PsiElement>,
         type: Type,
-        additionalAnnotations: () -> List<AnnotationWithTarget> = { emptyList() }
+        additionalAnnotations: () -> List<AnnotationWithTarget> = { emptyList() },
+        loadTypeAnnotations: (Type) -> List<AnnotationWithArgs> = { c.components.annotationLoader.loadTypeAnnotations(it, c.nameResolver) }
     ) {
         val abbreviatedType = type.abbreviatedType(c.typeTable)
         if (abbreviatedType != null) {
@@ -46,7 +47,8 @@ class TypeClsStubBuilder(private val c: ClsStubBuilderContext) {
 
         val typeReference = KotlinPlaceHolderStubImpl<KtTypeReference>(parent, KtStubElementTypes.TYPE_REFERENCE)
 
-        val annotations = c.components.annotationLoader.loadTypeAnnotations(type, c.nameResolver).filterNot {
+        val allAnnotationsInType = loadTypeAnnotations(type)
+        val annotations = allAnnotationsInType.filterNot {
             val isTopLevelClass = !it.classId.isNestedClass
             isTopLevelClass && it.classId.asSingleFqName() in ANNOTATIONS_NOT_LOADED_FOR_TYPES
         }
@@ -271,8 +273,8 @@ class TypeClsStubBuilder(private val c: ClsStubBuilderContext) {
         var suspendParameterType: Type? = null
 
         for ((index, argument) in typeArgumentsWithoutReceiverAndReturnType.withIndex()) {
+            val parameterType = argument.type(c.typeTable)!!
             if (isSuspend && index == typeArgumentsWithoutReceiverAndReturnType.size - 1) {
-                val parameterType = argument.type(c.typeTable)!!
                 if (parameterType.hasClassName() && parameterType.argumentCount == 1) {
                     val classId = c.nameResolver.getClassId(parameterType.className)
                     val fqName = classId.asSingleFqName()
@@ -286,11 +288,27 @@ class TypeClsStubBuilder(private val c: ClsStubBuilderContext) {
                     continue
                 }
             }
-            val parameter = KotlinParameterStubImpl(
-                parameterList, fqName = null, name = null, isMutable = false, hasValOrVar = false, hasDefaultValue = false
-            )
+            val annotations = c.components.annotationLoader.loadTypeAnnotations(parameterType, c.nameResolver)
 
-            createTypeReferenceStub(parameter, argument.type(c.typeTable)!!)
+            fun getFunctionTypeParameterName(annotations: List<AnnotationWithArgs>): String? {
+                for (annotationWithArgs in annotations) {
+                    if (annotationWithArgs.classId.asSingleFqName() == StandardNames.FqNames.parameterName) {
+                        return (annotationWithArgs.args.values.firstOrNull() as? StringValue)?.value
+                    }
+                }
+                return null
+            }
+
+            val parameter = KotlinParameterStubImpl(
+                parameterList,
+                fqName = null,
+                name = null,
+                isMutable = false,
+                hasValOrVar = false,
+                hasDefaultValue = false,
+                functionTypeParameterName = getFunctionTypeParameterName(annotations)
+            )
+            createTypeReferenceStub(parameter, parameterType, loadTypeAnnotations = { annotations })
         }
 
 

analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/stubBased/deserialization/StubBasedFirTypeDeserializer.kt

@@ -16,10 +16,10 @@ import org.jetbrains.kotlin.fir.declarations.builder.FirTypeParameterBuilder
 import org.jetbrains.kotlin.fir.declarations.utils.addDefaultBoundIfNecessary
 import org.jetbrains.kotlin.fir.diagnostics.ConeSimpleDiagnostic
 import org.jetbrains.kotlin.fir.diagnostics.DiagnosticKind
-import org.jetbrains.kotlin.fir.symbols.ConeClassLikeLookupTag
-import org.jetbrains.kotlin.fir.symbols.ConeClassifierLookupTag
-import org.jetbrains.kotlin.fir.symbols.ConeTypeParameterLookupTag
-import org.jetbrains.kotlin.fir.symbols.FirBasedSymbol
+import org.jetbrains.kotlin.fir.expressions.builder.buildAnnotation
+import org.jetbrains.kotlin.fir.expressions.builder.buildAnnotationArgumentMapping
+import org.jetbrains.kotlin.fir.expressions.builder.buildConstExpression
+import org.jetbrains.kotlin.fir.symbols.*
 import org.jetbrains.kotlin.fir.symbols.impl.FirClassLikeSymbol
 import org.jetbrains.kotlin.fir.symbols.impl.FirTypeParameterSymbol
 import org.jetbrains.kotlin.fir.types.*
@@ -29,11 +29,13 @@ import org.jetbrains.kotlin.fir.types.impl.ConeTypeParameterTypeImpl
 import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.name.ClassId
 import org.jetbrains.kotlin.name.FqName
+import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.hasSuspendModifier
 import org.jetbrains.kotlin.psi.psiUtil.unwrapNullability
 import org.jetbrains.kotlin.psi.stubs.elements.KtStubElementTypes
 import org.jetbrains.kotlin.psi.stubs.impl.*
+import org.jetbrains.kotlin.types.ConstantValueKind
 import org.jetbrains.kotlin.types.Variance
 
 class StubBasedFirTypeDeserializer(
@@ -99,11 +101,24 @@ class StubBasedFirTypeDeserializer(
         }
     }
 
-    private fun attributesFromAnnotations(typeReference: KtTypeReference): ConeAttributes =
-        annotationDeserializer.loadAnnotations(typeReference).computeTypeAttributes(moduleData.session, shouldExpandTypeAliases = false)
-
     fun type(typeReference: KtTypeReference): ConeKotlinType {
-        return type(typeReference, attributesFromAnnotations(typeReference))
+        val annotations = annotationDeserializer.loadAnnotations(typeReference).toMutableList()
+        val parent = typeReference.stub?.parentStub
+        if (parent is KotlinParameterStubImpl) {
+            (parent as? KotlinParameterStubImpl)?.functionTypeParameterName?.let { paramName ->
+                annotations += buildAnnotation {
+                    annotationTypeRef = buildResolvedTypeRef {
+                        type = StandardNames.FqNames.parameterNameClassId.toLookupTag()
+                            .constructClassType(emptyArray(), isNullable = false)
+                    }
+                    this.argumentMapping = buildAnnotationArgumentMapping {
+                        mapping[Name.identifier("name")] =
+                            buildConstExpression(null, ConstantValueKind.String, paramName, setType = true)
+                    }
+                }
+            }
+        }
+        return type(typeReference, annotations.computeTypeAttributes(moduleData.session, shouldExpandTypeAliases = false))
     }
 
     fun type(type: KotlinTypeBean): ConeKotlinType? {

compiler/psi/src/org/jetbrains/kotlin/psi/stubs/KotlinStubVersions.kt

@@ -23,12 +23,12 @@ object KotlinStubVersions {
     // Though only kotlin declarations (no code in the bodies) are stubbed, please do increase this version
     //      if you are not 100% sure it can be avoided.
     // Increasing this version will lead to reindexing of all kotlin source files on the first IDE startup with the new version.
-    const val SOURCE_STUB_VERSION = 152
+    const val SOURCE_STUB_VERSION = 153
 
     // Binary stub version should be increased if stub format (org.jetbrains.kotlin.psi.stubs.impl) is changed
     //      or changes are made to the core stub building code (org.jetbrains.kotlin.idea.decompiler.stubBuilder).
     // Increasing this version will lead to reindexing of all binary files that are potentially kotlin binaries (including all class files).
-    private const val BINARY_STUB_VERSION = 88
+    private const val BINARY_STUB_VERSION = 89
 
     // Classfile stub version should be increased if changes are made to classfile stub building subsystem (org.jetbrains.kotlin.idea.decompiler.classFile)
     // Increasing this version will lead to reindexing of all classfiles.

compiler/psi/src/org/jetbrains/kotlin/psi/stubs/elements/KtParameterElementType.java

@@ -42,7 +42,7 @@ public class KtParameterElementType extends KtStubElementType<KotlinParameterStu
         StringRef fqNameRef = StringRef.fromString(fqName != null ? fqName.asString() : null);
         return new KotlinParameterStubImpl(
                 (StubElement<?>) parentStub, fqNameRef, StringRef.fromString(psi.getName()),
-                psi.isMutable(), psi.hasValOrVar(), psi.hasDefaultValue()
+                psi.isMutable(), psi.hasValOrVar(), psi.hasDefaultValue(), null
         );
     }
 
@@ -54,6 +54,7 @@ public class KtParameterElementType extends KtStubElementType<KotlinParameterStu
         dataStream.writeBoolean(stub.hasDefaultValue());
         FqName name = stub.getFqName();
         dataStream.writeName(name != null ? name.asString() : null);
+        dataStream.writeName(stub instanceof KotlinParameterStubImpl ? ((KotlinParameterStubImpl) stub).getFunctionTypeParameterName() : null);
     }
 
     @NotNull
@@ -65,7 +66,8 @@ public class KtParameterElementType extends KtStubElementType<KotlinParameterStu
         boolean hasDefaultValue = dataStream.readBoolean();
         StringRef fqName = dataStream.readName();
 
-        return new KotlinParameterStubImpl((StubElement<?>) parentStub, fqName, name, isMutable, hasValOrValNode, hasDefaultValue);
+        return new KotlinParameterStubImpl((StubElement<?>) parentStub, fqName, name, isMutable, hasValOrValNode, hasDefaultValue,
+                                           dataStream.readNameString());
     }
 
     @Override

compiler/psi/src/org/jetbrains/kotlin/psi/stubs/impl/KotlinParameterStubImpl.kt

@@ -30,8 +30,10 @@ class KotlinParameterStubImpl(
     private val name: StringRef?,
     private val isMutable: Boolean,
     private val hasValOrVar: Boolean,
-    private val hasDefaultValue: Boolean
+    private val hasDefaultValue: Boolean,
+    val functionTypeParameterName: String? = null
 ) : KotlinStubBaseImpl<KtParameter>(parent, KtStubElementTypes.VALUE_PARAMETER), KotlinParameterStub {
+
     override fun getName(): String? {
         return StringRef.toString(name)
     }