KT-4770 Javac fails against Kotlin inner class

#KT-4770 fixed

compiler/backend/src/org/jetbrains/jet/codegen/FunctionCodegen.java

@@ -157,8 +157,8 @@ public class FunctionCodegen extends ParentCodegenAwareImpl {
 
         for (int i = 0; i < kotlinParameterTypes.size(); i++) {
             JvmMethodParameterKind kind = kotlinParameterTypes.get(i).getKind();
-            if (kind == JvmMethodParameterKind.ENUM_NAME || kind == JvmMethodParameterKind.ENUM_ORDINAL) {
+            if (kind.isSkippedInGenericSignature()) {
-                markEnumConstructorParameterAsSynthetic(mv, i);
+                markEnumOrInnerConstructorParameterAsSynthetic(mv, i);
                 continue;
             }
 
@@ -181,8 +181,8 @@ public class FunctionCodegen extends ParentCodegenAwareImpl {
 
         for (int i = 0; i < kotlinParameterTypes.size(); i++) {
             JvmMethodParameterKind kind = kotlinParameterTypes.get(i).getKind();
-            if (kind == JvmMethodParameterKind.ENUM_NAME || kind == JvmMethodParameterKind.ENUM_ORDINAL) {
+            if (kind.isSkippedInGenericSignature()) {
-                markEnumConstructorParameterAsSynthetic(mv, i);
+                markEnumOrInnerConstructorParameterAsSynthetic(mv, i);
                 continue;
             }
 
@@ -223,7 +223,7 @@ public class FunctionCodegen extends ParentCodegenAwareImpl {
         }
     }
 
-    private void markEnumConstructorParameterAsSynthetic(MethodVisitor mv, int i) {
+    private void markEnumOrInnerConstructorParameterAsSynthetic(MethodVisitor mv, int i) {
         // IDEA's ClsPsi builder fails to annotate synthetic parameters
         if (state.getClassBuilderMode() == ClassBuilderMode.LIGHT_CLASSES) return;
 

compiler/backend/src/org/jetbrains/jet/codegen/signature/BothSignatureWriter.java

@@ -183,8 +183,8 @@ public class BothSignatureWriter {
 
     public void writeParameterType(JvmMethodParameterKind parameterKind) {
         // This magic mimics the behavior of javac that enum constructor have these synthetic parameters in erased signature, but doesn't
-        // have them in generic signature. IDEA relies on this behavior.
+        // have them in generic signature. IDEA, javac and their friends rely on this behavior.
-        if (parameterKind == JvmMethodParameterKind.ENUM_NAME || parameterKind == JvmMethodParameterKind.ENUM_ORDINAL) {
+        if (parameterKind.isSkippedInGenericSignature()) {
             generic = true;
 
             // pushing dummy visitor, because we don't want these parameters to appear in generic JVM signature

compiler/backend/src/org/jetbrains/jet/codegen/signature/JvmMethodParameterKind.java

@@ -16,6 +16,8 @@
 
 package org.jetbrains.jet.codegen.signature;
 
+import java.util.EnumSet;
+
 public enum JvmMethodParameterKind {
     VALUE,
     THIS,
@@ -24,5 +26,11 @@ public enum JvmMethodParameterKind {
     SHARED_VAR,
     ENUM_NAME,
     ENUM_ORDINAL,
-    SUPER_CALL_PARAM
+    SUPER_CALL_PARAM;
+
+    private static final EnumSet<JvmMethodParameterKind> SKIPPED_IN_GENERIC_SIGNATURE = EnumSet.of(OUTER, ENUM_NAME, ENUM_ORDINAL);
+
+    public boolean isSkippedInGenericSignature() {
+        return SKIPPED_IN_GENERIC_SIGNATURE.contains(this);
+    }
 }

compiler/testData/compileJavaAgainstKotlin/class/InnerClass.java

@@ -0,0 +1,6 @@
+package test;
+
+class InnerClass {
+    Outer.Inner1 field1;
+    Outer.Inner2 field2;
+}

compiler/testData/compileJavaAgainstKotlin/class/InnerClass.kt

@@ -0,0 +1,6 @@
+package test
+
+class Outer {
+    inner class Inner1
+    inner class Inner2(param: String)
+}

compiler/testData/compileJavaAgainstKotlin/class/InnerClassConstructors.java

@@ -0,0 +1,8 @@
+package test;
+
+class InnerClassConstructors {
+    public static void main(String[] args) {
+        new Outer().new InnerGeneric(new java.util.ArrayList<String>());
+        new Outer().new InnerPrimitive(1);
+    }
+}

compiler/testData/compileJavaAgainstKotlin/class/InnerClassConstructors.kt

@@ -0,0 +1,7 @@
+package test
+
+class Outer {
+    inner class InnerGeneric(param: List<String>)
+
+    inner class InnerPrimitive(param: Int)
+}

compiler/testData/compileJavaAgainstKotlin/class/InnerClassOfGeneric.java

@@ -0,0 +1,8 @@
+package test;
+
+class InnerClassOfGeneric {
+    public static void main(String[] args) {
+        new Outer<String>().new Inner(new java.util.ArrayList<String>());
+        new Outer<String>().new InnerSimple();
+    }
+}

compiler/testData/compileJavaAgainstKotlin/class/InnerClassOfGeneric.kt

@@ -0,0 +1,7 @@
+package test
+
+class Outer<T> {
+    inner class Inner(list: List<T>)
+
+    inner class InnerSimple()
+}

compiler/tests/org/jetbrains/jet/codegen/AnnotationGenTest.java

@@ -146,8 +146,8 @@ public class AnnotationGenTest extends CodegenTestCase {
         Class<?> inner = outer.getDeclaredClasses()[0];
         Constructor constructor = inner.getDeclaredConstructor(outer, int.class);
         assertNotNull(constructor);
-        // Get annotations for first real parameter
+        // Get annotations for first parameter
-        Annotation[] annotations = constructor.getParameterAnnotations()[1];
+        Annotation[] annotations = constructor.getParameterAnnotations()[0];
         assertNotNull(getDeprecatedAnnotationFromList(annotations));
     }
 

compiler/tests/org/jetbrains/jet/jvm/compiler/CompileJavaAgainstKotlinTestGenerated.java

@@ -73,6 +73,21 @@ public class CompileJavaAgainstKotlinTestGenerated extends AbstractCompileJavaAg
             doTest("compiler/testData/compileJavaAgainstKotlin/class/ImplementsMapPP.kt");
         }
         
+        @TestMetadata("InnerClass.kt")
+        public void testInnerClass() throws Exception {
+            doTest("compiler/testData/compileJavaAgainstKotlin/class/InnerClass.kt");
+        }
+        
+        @TestMetadata("InnerClassConstructors.kt")
+        public void testInnerClassConstructors() throws Exception {
+            doTest("compiler/testData/compileJavaAgainstKotlin/class/InnerClassConstructors.kt");
+        }
+        
+        @TestMetadata("InnerClassOfGeneric.kt")
+        public void testInnerClassOfGeneric() throws Exception {
+            doTest("compiler/testData/compileJavaAgainstKotlin/class/InnerClassOfGeneric.kt");
+        }
+        
         @TestMetadata("kt3561.kt")
         public void testKt3561() throws Exception {
             doTest("compiler/testData/compileJavaAgainstKotlin/class/kt3561.kt");