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test/tools/javac/tree/ScopeTest.java@93012e2a5d1d (annotated)

test/tools/javac/tree/ScopeTest.java

Sat, 07 Nov 2020 10:30:02 +0800

author

aoqi

date

Sat, 07 Nov 2020 10:30:02 +0800

changeset 3938

93012e2a5d1d

parent 0

959103a6100f

permissions

-rw-r--r--

Added tag mips-jdk8u275-b01 for changeset eb6ee6a5f2fe

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	}