test/langtools/tools/javac/api/T6431879.java

/*
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 * 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
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/*
 * @test
 * @bug 6431879
 * @summary TreePathSCanner(CompilationUnitTree tree, P p) overloading forces use of most specific type
 * @modules jdk.compiler/com.sun.tools.javac.api
 *          jdk.compiler/com.sun.tools.javac.file
 */

import java.io.*;
import java.util.*;
import javax.tools.*;
import com.sun.source.tree.*;
import com.sun.source.util.*;
import com.sun.tools.javac.api.*;

public class T6431879 {
    public static void main(String... args) throws IOException {
        String testSrc = System.getProperty("test.src", ".");
        String testClasses = System.getProperty("test.classes", ".");
        JavacTool tool = JavacTool.create();
        try (StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null)) {
            Iterable<? extends JavaFileObject> files =
                fm.getJavaFileObjectsFromFiles(Arrays.asList(new File(testSrc, T6431879.class.getName()+".java")));
            JavacTask task = tool.getTask(null, fm, null, null, null, files);
            Iterable<? extends CompilationUnitTree> trees = task.parse();
            TreeScanner<Void,Trees> dependencyScanner = new DependencyScanner();
            Trees treeUtil = Trees.instance(task);
            for (CompilationUnitTree unit : trees) {
                //System.err.println("scan " + unit);
                dependencyScanner.scan(unit, treeUtil);
            }
        }
    }

    private static class DependencyScanner<R,P> extends TreePathScanner<R,P> {
        public R visitIdentifier(IdentifierTree tree, P p) {
            //System.err.println(tree);
            return null;
        }
    }
}