Tue, 16 Jun 2009 10:46:37 +0100
6638712: Inference with wildcard types causes selection of inapplicable method
Summary: Added global sanity check in order to make sure that return type inference does not violate bounds constraints
Reviewed-by: jjg
duke@1 | 1 | /* |
duke@1 | 2 | * Copyright 2002 Sun Microsystems, Inc. All Rights Reserved. |
duke@1 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@1 | 4 | * |
duke@1 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@1 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@1 | 7 | * published by the Free Software Foundation. |
duke@1 | 8 | * |
duke@1 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@1 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@1 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@1 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@1 | 13 | * accompanied this code). |
duke@1 | 14 | * |
duke@1 | 15 | * You should have received a copy of the GNU General Public License version |
duke@1 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@1 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@1 | 18 | * |
duke@1 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@1 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@1 | 21 | * have any questions. |
duke@1 | 22 | */ |
duke@1 | 23 | |
duke@1 | 24 | /* |
duke@1 | 25 | * @test |
duke@1 | 26 | * @ bug |
duke@1 | 27 | * @summary Negative regression test from odersky |
duke@1 | 28 | * @author odersky |
duke@1 | 29 | * |
darcy@289 | 30 | * @compile/fail BadTest.java |
duke@1 | 31 | */ |
duke@1 | 32 | |
duke@1 | 33 | class BadTest { |
duke@1 | 34 | static class Main { |
duke@1 | 35 | |
duke@1 | 36 | static <B> List<B> nil() { return new List<B>(); } |
duke@1 | 37 | static <A> List<A> cons(A x, List<A> xs) { return xs.prepend(x); } |
duke@1 | 38 | static <A> Cell<A> makeCell(A x) { return new Cell<A>(x); } |
duke@1 | 39 | static <A> A id(A x) { return x; } |
duke@1 | 40 | |
duke@1 | 41 | public static void main(String[] args) { |
duke@1 | 42 | List<Cell<String>> as = nil().prepend(makeCell(null)); |
duke@1 | 43 | List<Cell<String>> bs = cons(makeCell(null), nil()); |
duke@1 | 44 | List<String> xs = id(nil()); |
duke@1 | 45 | List<String> ys = cons("abc", id(nil())); |
duke@1 | 46 | List<String> zs = id(nil()).prepend("abc"); |
duke@1 | 47 | List<Cell<String>> us = id(nil()).prepend(makeCell(null)); |
duke@1 | 48 | List<Cell<String>> vs = cons(makeCell(null), id(nil())); |
duke@1 | 49 | System.out.println(nil() instanceof List<String>); |
duke@1 | 50 | nil(); |
duke@1 | 51 | } |
duke@1 | 52 | |
duke@1 | 53 | } |
duke@1 | 54 | } |