Thu, 30 Jul 2009 10:29:53 +0100
6827648: Extremely slow compilation time for visitor pattern code + generics
Summary: Javac unnecessarily recomputates type-substitutions multiple times
Reviewed-by: jjg
1 /*
2 * Copyright 2004-2007 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 */
25 /*
26 * Class with miscellaneous structures to exercise printing.
27 */
29 import java.util.Collection;
31 public final class Misc<T> implements Marker2, Marker3 {
32 private static final long longConstant = Long.MAX_VALUE;
34 private static final String asciispecials = "\t\n\u0007";
36 public void covar(Collection<? extends T> s) {return;}
38 public void contravar(Collection<? super T> s) {return;}
40 public <S> S varUse(int i) {return null;}
42 Object o = (new Object() {}); // verify fix for 5019108
43 }
45 interface Marker1 {}
47 interface Marker2 extends Marker1 {}
49 interface Marker3 {}