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
1 /*
2 * Copyright 2002-2003 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
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22 */
24 /*
25 * @test
26 * @ bug
27 * @summary Positive regression test from odersky
28 * @author odersky
29 *
30 * @compile Test4.java
31 */
33 class Test4 {
34 interface I {}
35 interface J {}
36 static class C implements I, J {}
37 static class D implements I, J {}
39 interface Ord {}
41 static C c = new C();
42 static D d = new D();
44 static <B> List<B> nil() { return new List<B>(); }
45 static <A, B extends A> A f(A x, B y) { return x; }
46 static <A, B extends A> B g(List<A> x, List<B> y) { return y.head; }
48 static <A> List<A> cons(A x, List<A> xs) { return xs.prepend(x); }
49 static <A> Cell<A> makeCell(A x) { return new Cell<A>(x); }
50 static <A> A id(A x) { return x; }
52 static Integer i = new Integer(1);
53 static Number n = i;
55 public static void main(String[] args) {
56 Number x = f(n, i);
57 String xy = g(cons("abc", Test4.<String>nil()), Test4.<String>nil());
58 System.out.println(g(cons("abc", nil()), nil()));
59 }
60 }