Add AdditionalBuiltInsMembers language feature and relevant checks

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/checkers/AdditionalBuiltInsMembersChecker.kt

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2010-2016 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.resolve.jvm.checkers
+
+import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.config.LanguageFeature
+import org.jetbrains.kotlin.config.LanguageFeatureSettings
+import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+import org.jetbrains.kotlin.diagnostics.DiagnosticSink
+import org.jetbrains.kotlin.diagnostics.Errors
+import org.jetbrains.kotlin.lexer.KtTokens
+import org.jetbrains.kotlin.load.java.descriptors.JavaCallableMemberDescriptor
+import org.jetbrains.kotlin.load.java.isFromBuiltins
+import org.jetbrains.kotlin.psi.KtDeclaration
+import org.jetbrains.kotlin.resolve.BindingContext
+import org.jetbrains.kotlin.resolve.DeclarationChecker
+import org.jetbrains.kotlin.resolve.calls.checkers.CallChecker
+import org.jetbrains.kotlin.resolve.calls.checkers.elementToReportOn
+import org.jetbrains.kotlin.resolve.calls.context.BasicCallResolutionContext
+import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
+import org.jetbrains.kotlin.resolve.descriptorUtil.overriddenTreeUniqueAsSequence
+
+object AdditionalBuiltInsMembersCallChecker : CallChecker {
+    override fun check(
+            resolvedCall: ResolvedCall<*>,
+            context: BasicCallResolutionContext,
+            languageFeatureSettings: LanguageFeatureSettings
+    ) {
+        if (languageFeatureSettings.supportsFeature(LanguageFeature.AdditionalBuiltInsMembers)) return
+        val resultingDescriptor = resolvedCall.resultingDescriptor as? CallableMemberDescriptor ?: return
+
+        reportErrorIfAdditionalBuiltinDescriptor(resultingDescriptor, context.trace, resolvedCall.elementToReportOn)
+    }
+}
+
+object AdditionalBuiltInsMemberOverrideDeclarationChecker : DeclarationChecker {
+    override fun check(
+            declaration: KtDeclaration,
+            descriptor: DeclarationDescriptor,
+            diagnosticHolder: DiagnosticSink,
+            bindingContext: BindingContext,
+            languageFeatureSettings: LanguageFeatureSettings
+    ) {
+        if (languageFeatureSettings.supportsFeature(LanguageFeature.AdditionalBuiltInsMembers)) return
+        val resultingDescriptor = descriptor as? CallableMemberDescriptor ?: return
+        val overrideKeyword = declaration.modifierList?.getModifier(KtTokens.OVERRIDE_KEYWORD) ?: return
+
+        // TODO: allow to omit 'override' on additional built-ins members
+        reportErrorIfAdditionalBuiltinDescriptor(resultingDescriptor, diagnosticHolder, overrideKeyword)
+    }
+}
+
+private fun reportErrorIfAdditionalBuiltinDescriptor(
+        descriptor: CallableMemberDescriptor,
+        diagnosticHolder: DiagnosticSink,
+        reportOn: PsiElement
+) {
+    @Suppress("UNCHECKED_CAST")
+    val overriddenTree = descriptor.overriddenTreeUniqueAsSequence(useOriginal = true) as Sequence<CallableMemberDescriptor>
+
+    if (overriddenTree.any { it.isFromBuiltins() && it is JavaCallableMemberDescriptor }) {
+        diagnosticHolder.report(Errors.UNSUPPORTED_FEATURE.on(reportOn, LanguageFeature.AdditionalBuiltInsMembers))
+    }
+}

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/platform/JvmPlatformConfigurator.kt

@@ -43,7 +43,8 @@ object JvmPlatformConfigurator : PlatformConfigurator(
                 JvmFieldApplicabilityChecker(),
                 TypeParameterBoundIsNotArrayChecker(),
                 JvmSyntheticApplicabilityChecker(),
-                StrictfpApplicabilityChecker()
+                StrictfpApplicabilityChecker(),
+                AdditionalBuiltInsMemberOverrideDeclarationChecker
         ),
 
         additionalCallCheckers = listOf(
@@ -54,7 +55,8 @@ object JvmPlatformConfigurator : PlatformConfigurator(
                 UnsupportedSyntheticCallableReferenceChecker(),
                 SuperCallWithDefaultArgumentsChecker(),
                 MissingDependencyClassChecker(),
-                ProtectedSyntheticExtensionCallChecker
+                ProtectedSyntheticExtensionCallChecker,
+                AdditionalBuiltInsMembersCallChecker
         ),
 
         additionalTypeCheckers = listOf(

compiler/frontend/src/org/jetbrains/kotlin/config/LanguageFeatureSettings.kt

@@ -24,7 +24,8 @@ enum class LanguageFeature(val sinceVersion: LanguageVersion) {
     BoundCallableReferences(KOTLIN_1_1),
     LocalDelegatedProperties(KOTLIN_1_1),
     TopLevelSealedInheritance(KOTLIN_1_1),
-    Coroutines(KOTLIN_1_1)
+    Coroutines(KOTLIN_1_1),
+    AdditionalBuiltInsMembers(KOTLIN_1_1)
     ;
 
     companion object {

compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/checkers/CallChecker.kt

@@ -48,3 +48,6 @@ interface SimpleCallChecker : CallChecker {
 @Suppress("unused")
 fun CallChecker.isComputingDeferredType(type: KotlinType) =
         type is DeferredType && type.isComputing
+
+val ResolvedCall<*>.elementToReportOn: KtElement
+    get() = call.calleeExpression ?: call.callElement

compiler/testData/diagnostics/testsWithJava8/targetedBuiltIns/unsupportedFeature.kt

@@ -0,0 +1,18 @@
+// !LANGUAGE: -AdditionalBuiltInsMembers
+// SKIP_TXT
+
+class A : java.util.ArrayList<String>() {
+    <!UNSUPPORTED_FEATURE!>override<!> fun stream(): java.util.stream.Stream<String> = super.<!UNSUPPORTED_FEATURE!>stream<!>()
+}
+
+class A1 : java.util.ArrayList<String>() {
+    // TODO: should be allowed
+    <!VIRTUAL_MEMBER_HIDDEN!>fun stream(): java.util.stream.Stream<String><!> = super.<!UNSUPPORTED_FEATURE!>stream<!>()
+}
+
+class B : <!UNSUPPORTED_FEATURE!>Throwable<!>("", null, false, false)
+
+fun foo(x: List<String>) {
+    x.<!UNSUPPORTED_FEATURE!>stream<!>()
+    java.util.ArrayList<String>().<!UNSUPPORTED_FEATURE!>stream<!>()
+}

compiler/tests-java8/tests/org/jetbrains/kotlin/checkers/DiagnosticsWithJava8TestGenerated.java

@@ -156,5 +156,11 @@ public class DiagnosticsWithJava8TestGenerated extends AbstractDiagnosticsWithFu
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithJava8/targetedBuiltIns/stream.kt");
             doTest(fileName);
         }
+
+        @TestMetadata("unsupportedFeature.kt")
+        public void testUnsupportedFeature() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithJava8/targetedBuiltIns/unsupportedFeature.kt");
+            doTest(fileName);
+        }
     }
 }

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/specialBuiltinMembers.kt

@@ -340,8 +340,8 @@ val CallableMemberDescriptor.isFromJava: Boolean
     get() = propertyIfAccessor is JavaCallableMemberDescriptor && propertyIfAccessor.containingDeclaration is JavaClassDescriptor
 
 fun CallableMemberDescriptor.isFromBuiltins(): Boolean {
-    val fqName = propertyIfAccessor.fqNameOrNull() ?: return false
+    val fqNameUnsafe = propertyIfAccessor.fqNameUnsafe
-    return fqName.toUnsafe().startsWith(KotlinBuiltIns.BUILT_INS_PACKAGE_NAME) &&
+    return fqNameUnsafe.startsWith(KotlinBuiltIns.BUILT_INS_PACKAGE_NAME) &&
             this.module == this.builtIns.builtInsModule
 }