| /* |
| * Copyright (c) 2010, 2015, 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 6921495 |
| * @summary spurious semicolons in class def cause empty NOPOS blocks |
| * @modules jdk.compiler |
| */ |
| |
| import java.io.*; |
| import java.net.*; |
| import java.util.*; |
| import javax.tools.*; |
| import com.sun.source.util.*; |
| |
| public class ExtraSemiTest { |
| |
| static class JavaSource extends SimpleJavaFileObject { |
| |
| final static String source = |
| "class C {\n" + |
| " int x;;\n" + |
| " class X { int i;; };\n" + |
| "}"; |
| |
| JavaSource() { |
| super(URI.create("myfo:/C.java"), JavaFileObject.Kind.SOURCE); |
| } |
| |
| @Override |
| public CharSequence getCharContent(boolean ignoreEncodingErrors) { |
| return source; |
| } |
| } |
| |
| public static void main(String... args) throws IOException { |
| new ExtraSemiTest().run(); |
| } |
| |
| void run() throws IOException { |
| File destDir = new File("classes"); destDir.mkdir(); |
| final JavaCompiler tool = ToolProvider.getSystemJavaCompiler(); |
| JavaSource source = new JavaSource(); |
| JavacTask ct = (JavacTask)tool.getTask(null, null, null, |
| Arrays.asList("-d", destDir.getPath(), "-XD-printsource"), |
| null, |
| Arrays.asList(source)); |
| Boolean ok = ct.call(); |
| if (!ok) throw new AssertionError("compilation failed"); |
| |
| String text = readFile(new File(destDir, "C.java")); |
| System.out.println(text); |
| |
| // compress/canonicalize all whitespace |
| String canon = text.replaceAll("\\s+", " "); |
| System.out.println("canon: " + canon); |
| |
| // There are no empty blocks in the original text. |
| // C will be given a default constructor "C() { super(); }" which |
| // does not have any empty blocks. |
| // The bug is that spurious semicolons in the class defn are parsed |
| // into redundant empty blocks in the tree, so verify there are |
| // no empty blocks in the -printsource output |
| |
| if (canon.contains("{ }")) |
| throw new AssertionError("unexpected empty block found"); |
| } |
| |
| String readFile(File f) throws IOException { |
| int len = (int) f.length(); |
| byte[] data = new byte[len]; |
| DataInputStream in = new DataInputStream(new FileInputStream(f)); |
| try { |
| in.readFully(data); |
| return new String(data); |
| } finally { |
| in.close(); |
| } |
| } |
| } |