Kapt3: Replace error/NonExistentClass with the actual type (from PSI) (KT-15421)

plugins/kapt3/src/org/jetbrains/kotlin/kapt3/Kapt3Extension.kt

@@ -198,7 +198,7 @@ abstract class AbstractKapt3Extension(
         logger.info { "Stubs compilation took $classFilesCompilationTime ms" }
         logger.info { "Compiled classes: " + compiledClasses.joinToString { it.name } }
 
-        return Pair(KaptContext(logger, compiledClasses, origins, options), generationState)
+        return Pair(KaptContext(logger, bindingContext, compiledClasses, origins, options), generationState)
     }
 
     private fun generateKotlinSourceStubs(kaptContext: KaptContext, generationState: GenerationState) {

plugins/kapt3/src/org/jetbrains/kotlin/kapt3/KaptContext.kt

@@ -24,12 +24,14 @@ import org.jetbrains.kotlin.kapt3.javac.KaptJavaCompiler
 import org.jetbrains.kotlin.kapt3.javac.KaptJavaLog
 import org.jetbrains.kotlin.kapt3.javac.KaptTreeMaker
 import org.jetbrains.kotlin.kapt3.util.KaptLogger
+import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.jvm.diagnostics.JvmDeclarationOrigin
 import org.jetbrains.org.objectweb.asm.tree.ClassNode
 import javax.tools.JavaFileManager
 
 class KaptContext(
         val logger: KaptLogger,
+        val bindingContext: BindingContext,
         val compiledClasses: List<ClassNode>,
         val origins: Map<Any, JvmDeclarationOrigin>,
         processorOptions: Map<String, String>

plugins/kapt3/src/org/jetbrains/kotlin/kapt3/stubs/ClassFileToSourceStubConverter.kt

@@ -28,10 +28,11 @@ import org.jetbrains.kotlin.kapt3.*
 import org.jetbrains.kotlin.kapt3.javac.KaptTreeMaker
 import org.jetbrains.kotlin.kapt3.javac.KaptJavaFileObject
 import org.jetbrains.kotlin.kapt3.util.*
-import org.jetbrains.kotlin.psi.KtFile
+import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.resolve.DescriptorUtils
 import org.jetbrains.kotlin.resolve.descriptorUtil.getSuperClassNotAny
 import org.jetbrains.kotlin.resolve.descriptorUtil.getSuperClassOrAny
+import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.typeUtil.isAnyOrNullableAny
 import org.jetbrains.org.objectweb.asm.Opcodes
 import org.jetbrains.org.objectweb.asm.Type
@@ -76,7 +77,7 @@ class ClassFileToSourceStubConverter(
         get() = _bindings
 
     private val fileManager = kaptContext.context.get(JavaFileManager::class.java) as JavacFileManager
-    private val treeMaker = TreeMaker.instance(kaptContext.context) as KaptTreeMaker
+    val treeMaker = TreeMaker.instance(kaptContext.context) as KaptTreeMaker
     private val signatureParser = SignatureParser(treeMaker)
 
     private var done = false
@@ -228,7 +229,11 @@ class ClassFileToSourceStubConverter(
         val typeExpression = if (isEnum(field.access))
             treeMaker.SimpleName(type.className.substringAfterLast('.'))
         else
-            getNotAnonymousType(descriptor) { signatureParser.parseFieldSignature(field.signature, treeMaker.Type(type)) }
+            getNotAnonymousType(descriptor) {
+                getNonErrorType((descriptor as? CallableDescriptor)?.returnType,
+                                ktTypeProvider = { (kaptContext.origins[field]?.element as? KtVariableDeclaration)?.typeReference },
+                                ifNonError = { signatureParser.parseFieldSignature(field.signature, treeMaker.Type(type)) })
+            }
 
         val value = field.value
 
@@ -288,8 +293,9 @@ class ClassFileToSourceStubConverter(
 
         val exceptionTypes = mapJList(method.exceptions) { treeMaker.FqName(it) }
 
-        val genericSignature = signatureParser.parseMethodSignature(method.signature, parameters, exceptionTypes, jcReturnType)
+        val valueParametersFromDescriptor = descriptor.valueParameters
-        val returnType = getNotAnonymousType(descriptor) { genericSignature.returnType }
+        val (genericSignature, returnType) = extractMethodSignatureTypes(
+                descriptor, exceptionTypes, jcReturnType, method, parameters, valueParametersFromDescriptor)
 
         val defaultValue = method.annotationDefault?.let { convertLiteralExpression(it) }
 
@@ -329,6 +335,65 @@ class ClassFileToSourceStubConverter(
                 body, defaultValue)
     }
 
+    private fun extractMethodSignatureTypes(
+            descriptor: CallableDescriptor,
+            exceptionTypes: JavacList<JCExpression>,
+            jcReturnType: JCExpression?, method: MethodNode,
+            parameters: JavacList<JCVariableDecl>,
+            valueParametersFromDescriptor: List<ValueParameterDescriptor>
+    ): Pair<SignatureParser.MethodGenericSignature, JCExpression?> {
+        val genericSignature = signatureParser.parseMethodSignature(
+                method.signature, parameters, exceptionTypes, jcReturnType,
+                nonErrorParameterTypeProvider = { index, lazyType ->
+                    if (descriptor is PropertySetterDescriptor && valueParametersFromDescriptor.size == 1 && index == 0) {
+                        getNonErrorType(descriptor.correspondingProperty.returnType,
+                                        ktTypeProvider = { (kaptContext.origins[method]?.element as? KtVariableDeclaration)?.typeReference },
+                                        ifNonError = { lazyType() })
+                    }
+                    else if (descriptor is FunctionDescriptor && valueParametersFromDescriptor.size == parameters.size) {
+                        getNonErrorType(valueParametersFromDescriptor[index].type,
+                                        ktTypeProvider = {
+                                            (kaptContext.origins[method]?.element as? KtFunction)?.valueParameters?.get(index)?.typeReference
+                                        },
+                                        ifNonError = { lazyType() })
+                    }
+                    else {
+                        lazyType()
+                    }
+                })
+
+        val returnType = getNotAnonymousType(descriptor) {
+            getNonErrorType(descriptor.returnType,
+                            ktTypeProvider = {
+                                val element = kaptContext.origins[method]?.element
+                                when (element) {
+                                    is KtFunction -> element.typeReference
+                                    is KtProperty -> if (method.name.startsWith("get")) element.typeReference else null
+                                    else -> null
+                                }
+                            },
+                            ifNonError = { genericSignature.returnType })
+        }
+
+        return Pair(genericSignature, returnType)
+    }
+
+    private inline fun <T : JCExpression?> getNonErrorType(
+            type: KotlinType?,
+            ktTypeProvider: () -> KtTypeReference?,
+            ifNonError: () -> T
+    ): T {
+        if (type?.containsErrorTypes() ?: false) {
+            val ktType = ktTypeProvider()
+            if (ktType != null) {
+                @Suppress("UNCHECKED_CAST")
+                return convertKtType(ktType, this) as T
+            }
+        }
+
+        return ifNonError()
+    }
+
     private inline fun <T : JCExpression?> getNotAnonymousType(descriptor: DeclarationDescriptor?, f: () -> T): T {
         if (descriptor is CallableDescriptor) {
             val returnTypeDescriptor = descriptor.returnType?.constructor?.declarationDescriptor

plugins/kapt3/src/org/jetbrains/kotlin/kapt3/stubs/SignatureParserVisitor.kt

@@ -131,10 +131,15 @@ class SignatureParser(val treeMaker: KaptTreeMaker) {
             signature: String?,
             rawParameters: JavacList<JCVariableDecl>,
             rawExceptionTypes: JavacList<JCExpression>,
-            rawReturnType: JCExpression?
+            rawReturnType: JCExpression?,
+            nonErrorParameterTypeProvider: (Int, () -> JCExpression) -> JCExpression
     ): MethodGenericSignature {
         if (signature == null) {
-            return MethodGenericSignature(JavacList.nil(), rawParameters, rawExceptionTypes, rawReturnType)
+            val parameters = mapJListIndexed(rawParameters) { index, it ->
+                val nonErrorType = nonErrorParameterTypeProvider(index) { it.vartype }
+                treeMaker.VarDef(it.modifiers, it.getName(), nonErrorType, it.initializer)
+            }
+            return MethodGenericSignature(JavacList.nil(), parameters, rawExceptionTypes, rawReturnType)
         }
 
         val root = parse(signature)
@@ -149,7 +154,9 @@ class SignatureParser(val treeMaker: KaptTreeMaker) {
         val offset = rawParameters.size - parameterTypes.size
         val jcParameters = mapJListIndexed(parameterTypes) { index, it ->
             val rawParameter = rawParameters[index + offset]
-            treeMaker.VarDef(rawParameter.modifiers, rawParameter.getName(), parseType(it.children.single()), rawParameter.initializer)
+            val nonErrorType = nonErrorParameterTypeProvider(index) { parseType(it.children.single()) }
+
+            treeMaker.VarDef(rawParameter.modifiers, rawParameter.getName(), nonErrorType, rawParameter.initializer)
         }
         val jcExceptionTypes = mapJList(exceptionTypes) { parseType(it) }
         val jcReturnType = if (rawReturnType == null) null else parseType(returnTypes.single().children.single())

plugins/kapt3/src/org/jetbrains/kotlin/kapt3/stubs/errorTypeConversion.kt

@@ -0,0 +1,114 @@
+/*
+ * Copyright 2010-2017 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.kapt3.stubs
+
+import com.sun.tools.javac.code.BoundKind
+import com.sun.tools.javac.tree.JCTree
+import org.jetbrains.kotlin.codegen.signature.BothSignatureWriter
+import org.jetbrains.kotlin.kapt3.mapJList
+import org.jetbrains.kotlin.load.kotlin.TypeMappingMode
+import org.jetbrains.kotlin.psi.*
+import org.jetbrains.kotlin.resolve.BindingContext
+import org.jetbrains.kotlin.types.KotlinType
+
+internal fun convertKtType(
+        reference: KtTypeReference?,
+        converter: ClassFileToSourceStubConverter,
+        shouldBeBoxed: Boolean = false,
+        gotTypeElement: KtTypeElement? = null
+): JCTree.JCExpression {
+    val type = gotTypeElement ?: reference?.typeElement
+
+    if (reference != null) {
+        val kotlinType = converter.kaptContext.bindingContext[BindingContext.TYPE, reference]
+        if (kotlinType != null && !kotlinType.containsErrorTypes()) {
+            val signatureWriter = BothSignatureWriter(BothSignatureWriter.Mode.TYPE)
+            converter.typeMapper.mapType(kotlinType, signatureWriter,
+                    if (shouldBeBoxed) TypeMappingMode.GENERIC_ARGUMENT else TypeMappingMode.DEFAULT)
+
+            return SignatureParser(converter.treeMaker).parseFieldSignature(
+                    signatureWriter.toString(), getDefaultTypeForUnknownType(converter))
+        }
+    }
+
+    return when (type) {
+        is KtUserType -> convertUserType(type, converter)
+        is KtNullableType -> {
+            // Prevent infinite recursion
+            val innerType = type.innerType ?: return getDefaultTypeForUnknownType(converter)
+            convertKtType(reference, converter, shouldBeBoxed = true, gotTypeElement = innerType)
+        }
+        is KtFunctionType -> convertFunctionType(type, converter)
+        else -> getDefaultTypeForUnknownType(converter)
+    }
+}
+
+private fun getDefaultTypeForUnknownType(converter: ClassFileToSourceStubConverter) = converter.treeMaker.FqName("error.NonExistentClass")
+
+private fun convertUserType(type: KtUserType, converter: ClassFileToSourceStubConverter): JCTree.JCExpression {
+    val qualifierExpression = type.qualifier?.let { convertUserType(it, converter) }
+    val referencedName = type.referencedName ?: "error"
+    val treeMaker = converter.treeMaker
+
+    val baseExpression = if (qualifierExpression == null) {
+        treeMaker.SimpleName(referencedName)
+    } else {
+        treeMaker.Select(qualifierExpression, treeMaker.name(referencedName))
+    }
+
+    val arguments = type.typeArguments
+    if (arguments.isEmpty()) {
+        return baseExpression
+    }
+
+    return treeMaker.TypeApply(baseExpression, mapJList(arguments) { convertTypeProjection(it, converter) })
+}
+
+private fun convertTypeProjection(type: KtTypeProjection, converter: ClassFileToSourceStubConverter): JCTree.JCExpression {
+    val reference = type.typeReference
+    val treeMaker = converter.treeMaker
+
+    return when (type.projectionKind) {
+        KtProjectionKind.IN -> treeMaker.Wildcard(treeMaker.TypeBoundKind(BoundKind.SUPER),
+                                                  convertKtType(reference, converter, shouldBeBoxed = true))
+        KtProjectionKind.OUT -> treeMaker.Wildcard(treeMaker.TypeBoundKind(BoundKind.EXTENDS),
+                                                   convertKtType(reference, converter, shouldBeBoxed = true))
+        KtProjectionKind.STAR -> treeMaker.Wildcard(treeMaker.TypeBoundKind(BoundKind.UNBOUND), null)
+        KtProjectionKind.NONE -> return convertKtType(reference, converter, shouldBeBoxed = true)
+    }
+}
+
+private fun convertFunctionType(type: KtFunctionType, converter: ClassFileToSourceStubConverter): JCTree.JCExpression {
+    val receiverType = type.receiverTypeReference
+    var parameterTypes = mapJList(type.parameters) { convertKtType(it.typeReference, converter) }
+    val returnType = convertKtType(type.returnTypeReference, converter)
+
+    if (receiverType != null) {
+        parameterTypes = parameterTypes.prepend(convertKtType(receiverType, converter))
+    }
+
+    parameterTypes = parameterTypes.append(returnType)
+
+    val treeMaker = converter.treeMaker
+    return treeMaker.TypeApply(treeMaker.SimpleName("Function" + (parameterTypes.size - 1)), parameterTypes)
+}
+
+fun KotlinType.containsErrorTypes(): Boolean {
+    if (this.isError) return true
+    if (this.arguments.any { it.type.containsErrorTypes() }) return true
+    return false
+}

plugins/kapt3/test/org/jetbrains/kotlin/kapt3/test/AbstractKotlinKapt3Test.kt

@@ -59,7 +59,7 @@ abstract class AbstractKotlinKapt3Test : CodegenTestCase() {
         val typeMapper = factory.generationState.typeMapper
 
         val logger = KaptLogger(isVerbose = true, messageCollector = messageCollector)
-        val kaptContext = KaptContext(logger, classBuilderFactory.compiledClasses,
+        val kaptContext = KaptContext(logger, factory.generationState.bindingContext, classBuilderFactory.compiledClasses,
                                       classBuilderFactory.origins, processorOptions = emptyMap())
         try {
             check(kaptContext, typeMapper, txtFile, wholeFile)
@@ -82,9 +82,14 @@ abstract class AbstractKotlinKapt3Test : CodegenTestCase() {
 
 abstract class AbstractClassFileToSourceStubConverterTest : AbstractKotlinKapt3Test() {
     override fun check(kaptRunner: KaptContext, typeMapper: KotlinTypeMapper, txtFile: File, wholeFile: File) {
-        val generateNonExistentClass = wholeFile.useLines { lines -> lines.any { it.trim() == "// NON_EXISTENT_CLASS" } }
+        fun isOptionSet(name: String) = wholeFile.useLines { lines -> lines.any { it.trim() == "// $name" } }
+
+        val generateNonExistentClass = isOptionSet("NON_EXISTENT_CLASS")
+        val validate = !isOptionSet("NO_VALIDATION")
+
         val javaFiles = convert(kaptRunner, typeMapper, generateNonExistentClass)
-        kaptRunner.compiler.enterTrees(javaFiles)
+
+        if (validate) kaptRunner.compiler.enterTrees(javaFiles)
 
         val actualRaw = javaFiles.sortedBy { it.sourceFile.name }.joinToString (FILE_SEPARATOR)
         val actual = StringUtil.convertLineSeparators(actualRaw.trim({ it <= ' ' })).trimTrailingWhitespacesAndAddNewlineAtEOF()

plugins/kapt3/test/org/jetbrains/kotlin/kapt3/test/ClassFileToSourceStubConverterTestGenerated.java

@@ -186,6 +186,12 @@ public class ClassFileToSourceStubConverterTestGenerated extends AbstractClassFi
         doTest(fileName);
     }
 
+    @TestMetadata("nonExistentClassTypesConversion.kt")
+    public void testNonExistentClassTypesConversion() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("plugins/kapt3/testData/converter/nonExistentClassTypesConversion.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("primitiveTypes.kt")
     public void testPrimitiveTypes() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("plugins/kapt3/testData/converter/primitiveTypes.kt");

plugins/kapt3/test/org/jetbrains/kotlin/kapt3/test/JavaKaptContextTest.kt

@@ -22,6 +22,7 @@ import org.jetbrains.kotlin.kapt3.KaptContext
 import org.jetbrains.kotlin.kapt3.diagnostic.KaptError
 import org.jetbrains.kotlin.kapt3.doAnnotationProcessing
 import org.jetbrains.kotlin.kapt3.util.KaptLogger
+import org.jetbrains.kotlin.resolve.BindingContext
 import org.junit.Assert.*
 import org.junit.Test
 import java.io.File
@@ -70,7 +71,7 @@ class JavaKaptContextTest {
                     }
                 }
 
-                return true;
+                return true
             }
 
             override fun getSupportedAnnotationTypes() = setOf("test.MyAnnotation")
@@ -79,6 +80,7 @@ class JavaKaptContextTest {
 
     private fun doAnnotationProcessing(javaSourceFile: File, processor: Processor, outputDir: File) {
         KaptContext(KaptLogger(isVerbose = true, messageCollector = messageCollector),
+                    bindingContext = BindingContext.EMPTY,
                     compiledClasses = emptyList(),
                     origins = emptyMap(),
                     processorOptions = emptyMap()

plugins/kapt3/testData/converter/nonExistentClass.kt

@@ -1,4 +1,5 @@
 // NON_EXISTENT_CLASS
+// NO_VALIDATION
 
 @Suppress("UNRESOLVED_REFERENCE")
 object NonExistentType {

plugins/kapt3/testData/converter/nonExistentClass.txt

@@ -1,32 +1,32 @@
 @kotlin.Suppress(names = {"UNRESOLVED_REFERENCE"})
 public final class NonExistentType {
-    private static final error.NonExistentClass a = null;
+    private static final ABCDEF a = null;
-    private static final java.util.List<error.NonExistentClass> b = null;
+    private static final List<ABCDEF> b = null;
-    private static final kotlin.jvm.functions.Function1<error.NonExistentClass, kotlin.Unit> c = null;
+    private static final Function1<ABCDEF, kotlin.Unit> c = null;
-    private static final error.NonExistentClass d = null;
+    private static final ABCDEF<java.lang.String, Function1<List<ABCDEF>, kotlin.Unit>> d = null;
     public static final NonExistentType INSTANCE = null;
 
-    public final error.NonExistentClass getA() {
+    public final ABCDEF getA() {
         return null;
     }
 
-    public final java.util.List<error.NonExistentClass> getB() {
+    public final List<ABCDEF> getB() {
         return null;
     }
 
-    public final kotlin.jvm.functions.Function1<error.NonExistentClass, kotlin.Unit> getC() {
+    public final Function1<ABCDEF, kotlin.Unit> getC() {
         return null;
     }
 
-    public final error.NonExistentClass getD() {
+    public final ABCDEF<java.lang.String, Function1<List<ABCDEF>, kotlin.Unit>> getD() {
         return null;
     }
 
-    public final error.NonExistentClass a(error.NonExistentClass a, java.lang.String s) {
+    public final ABCDEF a(ABCDEF a, java.lang.String s) {
         return null;
     }
 
-    public final error.NonExistentClass b(java.lang.String s) {
+    public final ABCDEF b(java.lang.String s) {
         return null;
     }
 
@@ -40,8 +40,4 @@ public final class NonExistentType {
 package error;
 
 public final class NonExistentClass {
-
-    public NonExistentClass() {
-        super();
-    }
 }

plugins/kapt3/testData/converter/nonExistentClassTypesConversion.kt

@@ -0,0 +1,34 @@
+// NON_EXISTENT_CLASS
+// NO_VALIDATION
+
+@Suppress("UNRESOLVED_REFERENCE")
+class Test {
+    lateinit var a: ABC
+    val b: ABC? = null
+    val c: List<ABC>? = null
+    val d: List<Map<BCD, ABC<List<BCD>>>>? = null
+    lateinit var e: List<out Map<out ABC, out BCD>?>
+    lateinit var f: ABC<*>
+    lateinit var g: List<*>
+    lateinit var h: ABC<Int, String>
+    lateinit var i: (ABC, List<BCD>) -> CDE
+    lateinit var j: () -> CDE
+    lateinit var k: ABC.(List<BCD>) -> CDE
+
+    lateinit var l: ABC.BCD.EFG
+
+    val m = ABC()
+    val n = "".toString()
+
+    fun f1(a: ABC): BCD? {
+        return null
+    }
+
+    fun <T> f2(a: ABC<String, Int, () -> BCD>) {}
+
+    fun <T> f3(a: ABC, b: Int): Long {
+        return 0
+    }
+
+    fun f4() = ABC()
+}

plugins/kapt3/testData/converter/nonExistentClassTypesConversion.txt

@@ -0,0 +1,126 @@
+@kotlin.Suppress(names = {"UNRESOLVED_REFERENCE"})
+public final class Test {
+    public ABC a;
+    private final ABC b = null;
+    private final List<ABC> c = null;
+    private final List<Map<BCD, ABC<List<BCD>>>> d = null;
+    public List<? extends Map<? extends ABC, ? extends BCD>> e;
+    public ABC<?> f;
+    public java.util.List<?> g;
+    public ABC<java.lang.Integer, java.lang.String> h;
+    public Function2<ABC, List<BCD>, CDE> i;
+    public Function0<CDE> j;
+    public Function2<ABC, List<BCD>, CDE> k;
+    public ABC.BCD.EFG l;
+    private final error.NonExistentClass m = null;
+    private final java.lang.String n = "";
+
+    public final ABC getA() {
+        return null;
+    }
+
+    public final void setA(ABC p0) {
+    }
+
+    public final ABC getB() {
+        return null;
+    }
+
+    public final List<ABC> getC() {
+        return null;
+    }
+
+    public final List<Map<BCD, ABC<List<BCD>>>> getD() {
+        return null;
+    }
+
+    public final List<? extends Map<? extends ABC, ? extends BCD>> getE() {
+        return null;
+    }
+
+    public final void setE(List<? extends Map<? extends ABC, ? extends BCD>> p0) {
+    }
+
+    public final ABC<?> getF() {
+        return null;
+    }
+
+    public final void setF(ABC<?> p0) {
+    }
+
+    public final java.util.List<?> getG() {
+        return null;
+    }
+
+    public final void setG(java.util.List<?> p0) {
+    }
+
+    public final ABC<java.lang.Integer, java.lang.String> getH() {
+        return null;
+    }
+
+    public final void setH(ABC<java.lang.Integer, java.lang.String> p0) {
+    }
+
+    public final Function2<ABC, List<BCD>, CDE> getI() {
+        return null;
+    }
+
+    public final void setI(Function2<ABC, List<BCD>, CDE> p0) {
+    }
+
+    public final Function0<CDE> getJ() {
+        return null;
+    }
+
+    public final void setJ(Function0<CDE> p0) {
+    }
+
+    public final Function2<ABC, List<BCD>, CDE> getK() {
+        return null;
+    }
+
+    public final void setK(Function2<ABC, List<BCD>, CDE> p0) {
+    }
+
+    public final ABC.BCD.EFG getL() {
+        return null;
+    }
+
+    public final void setL(ABC.BCD.EFG p0) {
+    }
+
+    public final error.NonExistentClass getM() {
+        return null;
+    }
+
+    public final java.lang.String getN() {
+        return null;
+    }
+
+    public final BCD f1(ABC a) {
+        return null;
+    }
+
+    public final <T extends java.lang.Object>void f2(ABC<java.lang.String, java.lang.Integer, Function0<BCD>> a) {
+    }
+
+    public final <T extends java.lang.Object>long f3(ABC a, int b) {
+        return 0L;
+    }
+
+    public final error.NonExistentClass f4() {
+        return null;
+    }
+
+    public Test() {
+        super();
+    }
+}
+
+////////////////////
+
+package error;
+
+public final class NonExistentClass {
+}