| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 8159970 |
| * @summary javac, JLS8 18.2.4 is not completely implemented by the compiler |
| * @library /tools/lib/types |
| * @modules jdk.compiler/com.sun.tools.javac.api |
| * jdk.compiler/com.sun.tools.javac.main |
| * jdk.compiler/com.sun.tools.javac.code |
| * jdk.compiler/com.sun.tools.javac.comp |
| * jdk.compiler/com.sun.tools.javac.tree |
| * jdk.compiler/com.sun.tools.javac.util |
| * jdk.compiler/com.sun.tools.javac.file |
| * @build TypeHarness |
| * @run main TypeEqualityInInferenceTest |
| */ |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import com.sun.tools.javac.code.Type; |
| import com.sun.tools.javac.code.Type.UndetVar; |
| import com.sun.tools.javac.code.Type.UndetVar.InferenceBound; |
| import com.sun.tools.javac.util.Assert; |
| |
| public class TypeEqualityInInferenceTest extends TypeHarness { |
| StrToTypeFactory strToTypeFactory; |
| |
| public static void main(String... args) throws Exception { |
| new TypeEqualityInInferenceTest().runAll(); |
| } |
| |
| void runAll() { |
| List<String> imports = new ArrayList<>(); |
| imports.add("java.util.*"); |
| List<String> typeVars = new ArrayList<>(); |
| typeVars.add("T"); |
| strToTypeFactory = new StrToTypeFactory(null, imports, typeVars); |
| |
| runTest("List<? extends T>", "List<? extends String>", predef.stringType); |
| runTest("List<? extends T>", "List<?>", predef.objectType); |
| runTest("List<? super T>", "List<? super String>", predef.stringType); |
| } |
| |
| void runTest(String freeTypeStr, String typeStr, Type equalityBoundType) { |
| Type freeType = strToTypeFactory.getType(freeTypeStr); |
| Type aType = strToTypeFactory.getType(typeStr); |
| |
| withInferenceContext(strToTypeFactory.getTypeVars(), inferenceContext -> { |
| assertSameType(inferenceContext.asUndetVar(freeType), aType); |
| UndetVar undetVarForT = (UndetVar)inferenceContext.undetVars().head; |
| checkEqualityBound(undetVarForT, equalityBoundType); |
| }); |
| |
| withInferenceContext(strToTypeFactory.getTypeVars(), inferenceContext -> { |
| assertSameType(aType, inferenceContext.asUndetVar(freeType)); |
| UndetVar undetVarForT = (UndetVar)inferenceContext.undetVars().head; |
| checkEqualityBound(undetVarForT, equalityBoundType); |
| }); |
| } |
| |
| void checkEqualityBound(UndetVar uv, Type boundType) { |
| com.sun.tools.javac.util.List<Type> equalBounds = uv.getBounds(InferenceBound.EQ); |
| Assert.check(!equalBounds.isEmpty() && equalBounds.length() == 1, |
| "undetVar must have only one equality bound"); |
| Type bound = equalBounds.head; |
| Assert.check(bound == boundType, "equal bound must be of type " + boundType); |
| } |
| } |