1 /*

     2  * Copyright 2006 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  */

    23 

    24 /*

    25  * @test

    26  * @bug     6471599

    27  * @summary Type of rhs cannot be obtained when assigning to erroneous symbol

    28  * @author  Peter von der Ah\u00e9

    29  * @compile Main.java

    30  * @run main Main

    31  */

    32 

    33 import com.sun.source.tree.AssignmentTree;

    34 import com.sun.source.tree.CompilationUnitTree;

    35 import com.sun.source.util.JavacTask;

    36 import com.sun.source.util.TreePath;

    37 import com.sun.source.util.TreePathScanner;

    38 import com.sun.source.util.Trees;

    39 import com.sun.tools.javac.util.List;

    40 import java.io.IOException;

    41 import java.net.URI;

    42 import javax.lang.model.type.TypeKind;

    43 import javax.tools.JavaCompiler;

    44 import javax.tools.JavaFileObject;

    45 import javax.tools.SimpleJavaFileObject;

    46 import javax.tools.ToolProvider;

    47 

    48 public class Main {

    49     static class MyFileObject extends SimpleJavaFileObject {

    50         public MyFileObject() {

    51             super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);

    52         }

    53         public CharSequence getCharContent(boolean ignoreEncodingErrors) {

    54             return "public class Test { { x = java.util.Collections.emptySet(); } }";

    55         }

    56     }

    57     static Trees trees;

    58     public static void main(String[] args) throws IOException {

    59         JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

    60         JavacTask task = (JavacTask) compiler.getTask(null, null, null, null, null, List.of(new MyFileObject()));

    61         trees = Trees.instance(task);

    62         Iterable<? extends CompilationUnitTree> asts = task.parse();

    63         task.analyze();

    64         for (CompilationUnitTree ast : asts) {

    65             new MyVisitor().scan(ast, null);

    66         }

    67     }

    68 

    69     static class MyVisitor extends TreePathScanner<Void,Void> {

    70         @Override

    71         public Void visitAssignment(AssignmentTree node, Void ignored) {

    72             TreePath path = TreePath.getPath(getCurrentPath(), node.getExpression());

    73             if (trees.getTypeMirror(path).getKind() == TypeKind.ERROR)

    74                 throw new AssertionError(path.getLeaf());

    75             return null;

    76         }

    77 

    78     }

    79 }