Support platformStatic members in companion object of enums

#KT-7777 Fixed

compiler/frontend.java/src/org/jetbrains/kotlin/load/kotlin/KotlinJvmCheckerProvider.kt

@@ -25,7 +25,10 @@ import org.jetbrains.kotlin.load.java.lazy.types.isMarkedNullable
 import org.jetbrains.kotlin.load.kotlin.nativeDeclarations.NativeFunChecker
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.psi.*
-import org.jetbrains.kotlin.resolve.*
+import org.jetbrains.kotlin.resolve.AdditionalCheckerProvider
+import org.jetbrains.kotlin.resolve.DeclarationChecker
+import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils
+import org.jetbrains.kotlin.resolve.DescriptorUtils
 import org.jetbrains.kotlin.resolve.annotations.hasInlineAnnotation
 import org.jetbrains.kotlin.resolve.annotations.hasIntrinsicAnnotation
 import org.jetbrains.kotlin.resolve.annotations.hasPlatformStaticAnnotation
@@ -95,11 +98,11 @@ public class PlatformStaticAnnotationChecker : DeclarationChecker {
         val container = descriptor.getContainingDeclaration()
         val insideObject = container != null && DescriptorUtils.isNonCompanionObject(container)
         val insideCompanionObjectInClass =
-                container != null && DescriptorUtils.isCompanionObject(container) && DescriptorUtils.isClass(container.getContainingDeclaration())
-                container != null && DescriptorUtils.isCompanionObject(container) && DescriptorUtils.isClass(container.getContainingDeclaration())
+                container != null && DescriptorUtils.isCompanionObject(container) &&
+                container.getContainingDeclaration().let { DescriptorUtils.isClass(it) || DescriptorUtils.isEnumClass(it) }
 
         if (!insideObject && !insideCompanionObjectInClass) {
-            diagnosticHolder.report(ErrorsJvm.PLATFORM_STATIC_NOT_IN_OBJECT.on(declaration));
+            diagnosticHolder.report(ErrorsJvm.PLATFORM_STATIC_NOT_IN_OBJECT.on(declaration))
         }
 
         val checkDeclaration = when(declaration) {
@@ -108,7 +111,7 @@ public class PlatformStaticAnnotationChecker : DeclarationChecker {
         }
 
         if (insideObject && checkDeclaration.getModifierList()?.hasModifier(JetTokens.OVERRIDE_KEYWORD) == true) {
-            diagnosticHolder.report(ErrorsJvm.OVERRIDE_CANNOT_BE_STATIC.on(declaration));
+            diagnosticHolder.report(ErrorsJvm.OVERRIDE_CANNOT_BE_STATIC.on(declaration))
         }
     }
 }

compiler/frontend/src/org/jetbrains/kotlin/resolve/AnnotationUtil.kt

@@ -16,12 +16,11 @@
 
 package org.jetbrains.kotlin.resolve.annotations
 
-import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
-import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.descriptors.CallableDescriptor
-import org.jetbrains.kotlin.resolve.DescriptorUtils
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 import org.jetbrains.kotlin.descriptors.PropertyAccessorDescriptor
-import org.jetbrains.kotlin.descriptors.ClassKind
+import org.jetbrains.kotlin.name.FqName
+import org.jetbrains.kotlin.resolve.DescriptorUtils
 
 public fun DeclarationDescriptor.hasInlineAnnotation(): Boolean {
     return getAnnotations().findAnnotation(FqName("kotlin.inline")) != null
@@ -36,7 +35,7 @@ public fun DeclarationDescriptor.hasIntrinsicAnnotation(): Boolean {
 }
 
 public fun CallableDescriptor.isPlatformStaticInObjectOrClass(): Boolean =
-        isPlatformStaticIn { DescriptorUtils.isNonCompanionObject(it) || DescriptorUtils.isClass(it) }
+        isPlatformStaticIn { DescriptorUtils.isNonCompanionObject(it) || DescriptorUtils.isClass(it) || DescriptorUtils.isEnumClass(it) }
 
 public fun CallableDescriptor.isPlatformStaticInCompanionObject(): Boolean =
         isPlatformStaticIn { DescriptorUtils.isCompanionObject(it) }

compiler/testData/codegen/boxWithJava/platformStatic/enumCompanion/Test.java

@@ -0,0 +1,17 @@
+class Test {
+    public static String foo() {
+        return A.foo;
+    }
+
+    public static String bar() {
+        return A.bar;
+    }
+
+    public static String getBar() {
+        return A.getBar();
+    }
+
+    public static String baz() {
+        return A.baz();
+    }
+}

compiler/testData/codegen/boxWithJava/platformStatic/enumCompanion/enumCompanionObject.kt

@@ -0,0 +1,19 @@
+import kotlin.platform.platformStatic
+
+enum class A {
+    companion object {
+        val foo: String = "OK"
+
+        platformStatic val bar: String = "OK"
+
+        platformStatic fun baz() = foo
+    }
+}
+
+fun box(): String {
+    if (Test.foo() != "OK") return "Fail foo"
+    if (Test.bar() != "OK") return "Fail bar"
+    if (Test.getBar() != "OK") return "Fail getBar"
+    if (Test.baz() != "OK") return "Fail baz"
+    return "OK"
+}

compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxWithJavaCodegenTestGenerated.java

@@ -173,6 +173,12 @@ public class BlackBoxWithJavaCodegenTestGenerated extends AbstractBlackBoxCodege
             doTestWithJava(fileName);
         }
 
+        @TestMetadata("enumCompanion")
+        public void testEnumCompanion() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxWithJava/platformStatic/enumCompanion/");
+            doTestWithJava(fileName);
+        }
+
         @TestMetadata("object")
         public void testObject() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxWithJava/platformStatic/object/");