test/tools/javac/generics/wildcards/AssignmentSameType2.java

/*
 * Copyright 2003 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

/*
 * @test
 * @summary Test subtyping for wildcards with the same type bound.
 *
 * @compile/fail -source 1.5 AssignmentSameType2.java
 */

public class AssignmentSameType2 {

    public static void main(String[] args) {
        Ref<B> exact = null;
        Ref<? extends B> ebound = null;
        Ref<? super B> sbound = null;
        Ref<?> unbound = null;

        exact = ebound;         // <<fail>> <A> = <? extends A>
    }
}

class Ref<A> {}
class B {}