Fri, 24 Apr 2020 03:58:51 +0100
Merge
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | */ |
aoqi@0 | 23 | |
aoqi@0 | 24 | /* |
aoqi@0 | 25 | * @test |
aoqi@0 | 26 | * @bug 8023835 |
aoqi@0 | 27 | * @summary Verify that implicit type of lambda parameter is correctly attributed |
aoqi@0 | 28 | * in Scope |
aoqi@0 | 29 | * @run main ScopeTest |
aoqi@0 | 30 | */ |
aoqi@0 | 31 | |
aoqi@0 | 32 | import com.sun.source.tree.CompilationUnitTree; |
aoqi@0 | 33 | import com.sun.source.tree.MemberSelectTree; |
aoqi@0 | 34 | import com.sun.source.tree.Scope; |
aoqi@0 | 35 | import com.sun.source.util.JavacTask; |
aoqi@0 | 36 | import com.sun.source.util.TreePath; |
aoqi@0 | 37 | import com.sun.source.util.TreePathScanner; |
aoqi@0 | 38 | import com.sun.source.util.Trees; |
aoqi@0 | 39 | import com.sun.tools.javac.api.JavacTaskImpl; |
aoqi@0 | 40 | import com.sun.tools.javac.api.JavacTool; |
aoqi@0 | 41 | import com.sun.tools.javac.model.JavacTypes; |
aoqi@0 | 42 | import java.io.IOException; |
aoqi@0 | 43 | import java.net.URI; |
aoqi@0 | 44 | import java.util.ArrayList; |
aoqi@0 | 45 | import java.util.Collections; |
aoqi@0 | 46 | import javax.lang.model.element.Element; |
aoqi@0 | 47 | import javax.lang.model.type.TypeMirror; |
aoqi@0 | 48 | import javax.lang.model.util.Types; |
aoqi@0 | 49 | import javax.tools.JavaFileObject; |
aoqi@0 | 50 | import javax.tools.JavaFileObject.Kind; |
aoqi@0 | 51 | import javax.tools.SimpleJavaFileObject; |
aoqi@0 | 52 | |
aoqi@0 | 53 | public class ScopeTest { |
aoqi@0 | 54 | |
aoqi@0 | 55 | private static final String SOURCE_CODE = |
aoqi@0 | 56 | "public class Test {\n" + |
aoqi@0 | 57 | " private static void test() {\n" + |
aoqi@0 | 58 | " InvokeOn f = null;\n" + |
aoqi@0 | 59 | " f.run(x -> { x.correct(); });\n" + |
aoqi@0 | 60 | " }\n" + |
aoqi@0 | 61 | " public static final class FooBar {\n" + |
aoqi@0 | 62 | " public void dontRun() { }\n" + |
aoqi@0 | 63 | " }\n" + |
aoqi@0 | 64 | "}\n" + |
aoqi@0 | 65 | "class InvokeOn {\n" + |
aoqi@0 | 66 | " public void run(I i) { }\n" + |
aoqi@0 | 67 | "}\n" + |
aoqi@0 | 68 | "class FooBar {\n" + |
aoqi@0 | 69 | " public void correct() { }\n" + |
aoqi@0 | 70 | "}\n" + |
aoqi@0 | 71 | "interface I {\n" + |
aoqi@0 | 72 | " public void run(FooBar f);\n" + |
aoqi@0 | 73 | "}"; |
aoqi@0 | 74 | |
aoqi@0 | 75 | public static void main(String... args) throws Exception { |
aoqi@0 | 76 | verifyLambdaScopeCorrect(""); |
aoqi@0 | 77 | verifyLambdaScopeCorrect("package test;"); |
aoqi@0 | 78 | } |
aoqi@0 | 79 | |
aoqi@0 | 80 | private static void verifyLambdaScopeCorrect(final String packageClause) throws Exception { |
aoqi@0 | 81 | JavacTool tool = JavacTool.create(); |
aoqi@0 | 82 | JavaFileObject source = new SimpleJavaFileObject(URI.create("mem://Test.java"), Kind.SOURCE) { |
aoqi@0 | 83 | @Override public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException { |
aoqi@0 | 84 | return packageClause + SOURCE_CODE; |
aoqi@0 | 85 | } |
aoqi@0 | 86 | @Override public boolean isNameCompatible(String simpleName, Kind kind) { |
aoqi@0 | 87 | return true; |
aoqi@0 | 88 | } |
aoqi@0 | 89 | }; |
aoqi@0 | 90 | Iterable<? extends JavaFileObject> fos = Collections.singletonList(source); |
aoqi@0 | 91 | JavacTask task = tool.getTask(null, null, null, new ArrayList<String>(), null, fos); |
aoqi@0 | 92 | final Types types = JavacTypes.instance(((JavacTaskImpl) task).getContext()); |
aoqi@0 | 93 | final Trees trees = Trees.instance(task); |
aoqi@0 | 94 | CompilationUnitTree cu = task.parse().iterator().next(); |
aoqi@0 | 95 | |
aoqi@0 | 96 | task.analyze(); |
aoqi@0 | 97 | |
aoqi@0 | 98 | new TreePathScanner<Void, Void>() { |
aoqi@0 | 99 | @Override public Void visitMemberSelect(MemberSelectTree node, Void p) { |
aoqi@0 | 100 | if (node.getIdentifier().contentEquals("correct")) { |
aoqi@0 | 101 | TypeMirror xType = trees.getTypeMirror(new TreePath(getCurrentPath(), node.getExpression())); |
aoqi@0 | 102 | Scope scope = trees.getScope(getCurrentPath()); |
aoqi@0 | 103 | for (Element l : scope.getLocalElements()) { |
aoqi@0 | 104 | if (!l.getSimpleName().contentEquals("x")) continue; |
aoqi@0 | 105 | if (!types.isSameType(xType, l.asType())) { |
aoqi@0 | 106 | throw new IllegalStateException("Incorrect variable type in scope: " + l.asType() + "; should be: " + xType); |
aoqi@0 | 107 | } |
aoqi@0 | 108 | } |
aoqi@0 | 109 | } |
aoqi@0 | 110 | return super.visitMemberSelect(node, p); |
aoqi@0 | 111 | } |
aoqi@0 | 112 | }.scan(cu, null); |
aoqi@0 | 113 | } |
aoqi@0 | 114 | } |