101 lines
3.5 KiB
Java
101 lines
3.5 KiB
Java
/*
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* Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8206986
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* @summary Ensure than parser can parse incomplete sources
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* @modules jdk.compiler
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*/
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import java.io.StringWriter;
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import java.net.URI;
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import java.util.Arrays;
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import java.util.List;
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import javax.tools.*;
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import com.sun.source.util.JavacTask;
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public class ParseIncomplete {
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private static final String CODE =
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"public class C {" +
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" void t1(Integer i) {" +
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" switch (i) {" +
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" case null: i++; break;" +
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" case 0, 1: i++; break;" +
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" default: i++; break;" +
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" }" +
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" }" +
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" int t2(Integer i) {" +
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" return switch (i) {" +
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" case null: yield 0;" +
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" case 0, 1: yield 1;" +
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" default: yield 2;" +
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" }" +
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" }" +
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"}";
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public static void main(String[] args) throws Exception {
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final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
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assert tool != null;
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DiagnosticListener<JavaFileObject> noErrors = d -> {};
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String sourceVersion = Integer.toString(Runtime.version().feature());
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for (int i = 0; i < CODE.length(); i++) {
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String code = CODE.substring(0, i + 1);
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StringWriter out = new StringWriter();
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try {
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JavacTask ct = (JavacTask) tool.getTask(out, null, noErrors,
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List.of("-XDdev"), null,
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Arrays.asList(new MyFileObject(code)));
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ct.parse().iterator().next();
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} catch (Throwable t) {
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System.err.println("Unexpected exception for code: " + code);
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System.err.println("output: " + out);
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throw t;
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}
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if (!out.toString().isEmpty()) {
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System.err.println("Unexpected compiler for code: " + code);
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System.err.println(out);
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throw new AssertionError();
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}
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}
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}
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static class MyFileObject extends SimpleJavaFileObject {
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private String text;
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public MyFileObject(String text) {
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super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
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this.text = text;
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}
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@Override
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public CharSequence getCharContent(boolean ignoreEncodingErrors) {
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return text;
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}
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}
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}
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