/*

 * Copyright (c) 2005, 2008, 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 6199662 6325201 6726015

 * @summary javac: compilation success depends on compilation order

 *

 * @compile Tree.java TreeScanner.java TreeInfo.java

 * @compile TreeInfo.java TreeScanner.java Tree.java

 *

 * @compile -XDcompilePolicy=bytodo Tree.java TreeScanner.java TreeInfo.java

 * @compile -XDcompilePolicy=bytodo TreeInfo.java TreeScanner.java Tree.java

 *

 * @compile -XDcompilePolicy=byfile Tree.java TreeScanner.java TreeInfo.java

 * @compile -XDcompilePolicy=byfile TreeInfo.java TreeScanner.java Tree.java

 *

 * @compile -XDcompilePolicy=simple Tree.java TreeScanner.java TreeInfo.java

 * @compile -XDcompilePolicy=simple TreeInfo.java TreeScanner.java Tree.java

 *

 * @compile -XDcompilePolicy=check  Tree.java TreeScanner.java TreeInfo.java

 * @compile -XDcompilePolicy=check  TreeInfo.java TreeScanner.java Tree.java

 *

 * @compile -XDcompilePolicy=attr   Tree.java TreeScanner.java TreeInfo.java

 * @compile -XDcompilePolicy=attr   TreeInfo.java TreeScanner.java Tree.java

 */

package p;

public abstract class Tree {

    /** Visit this tree with a given visitor.

     */

    public abstract <E extends Throwable> void accept(Visitor<E> v) throws E;

    /** A generic visitor class for trees.

     */

    public static abstract class Visitor<E extends Throwable> {

        public void visitTree(Tree that)                   throws E { assert false; }

    }

}