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
mcimadamore@26 | 1 | /* |
mcimadamore@26 | 2 | * Copyright 2008 Sun Microsystems, Inc. All Rights Reserved. |
mcimadamore@26 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
mcimadamore@26 | 4 | * |
mcimadamore@26 | 5 | * This code is free software; you can redistribute it and/or modify it |
mcimadamore@26 | 6 | * under the terms of the GNU General Public License version 2 only, as |
mcimadamore@26 | 7 | * published by the Free Software Foundation. |
mcimadamore@26 | 8 | * |
mcimadamore@26 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
mcimadamore@26 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
mcimadamore@26 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
mcimadamore@26 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
mcimadamore@26 | 13 | * accompanied this code). |
mcimadamore@26 | 14 | * |
mcimadamore@26 | 15 | * You should have received a copy of the GNU General Public License version |
mcimadamore@26 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
mcimadamore@26 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
mcimadamore@26 | 18 | * |
mcimadamore@26 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
mcimadamore@26 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
mcimadamore@26 | 21 | * have any questions. |
mcimadamore@26 | 22 | */ |
mcimadamore@26 | 23 | |
mcimadamore@26 | 24 | /* |
mcimadamore@26 | 25 | * @test |
mcimadamore@26 | 26 | * @bug 6481655 |
mcimadamore@26 | 27 | * @summary Parser confused by combination of parens and explicit type args |
mcimadamore@26 | 28 | * @author Maurizio Cimadamore |
mcimadamore@26 | 29 | */ |
mcimadamore@26 | 30 | |
mcimadamore@26 | 31 | public class T6481655 { |
mcimadamore@26 | 32 | |
mcimadamore@26 | 33 | public static <T> T getT(T t) { |
mcimadamore@26 | 34 | return t; |
mcimadamore@26 | 35 | } |
mcimadamore@26 | 36 | |
mcimadamore@26 | 37 | public static void main(String... s) { |
mcimadamore@26 | 38 | T6481655.<String>getT(""); |
mcimadamore@26 | 39 | (T6481655.<String>getT("")).getClass(); |
mcimadamore@26 | 40 | } |
mcimadamore@26 | 41 | } |