BadTest.java revision 0:9a66ca7c79fa 
1/*
2 * Copyright 2002 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 */
23
24/*
25 * @test
26 * @ bug
27 * @summary Negative regression test from odersky
28 * @author odersky
29 *
30 * @compile/fail -source 1.5 BadTest.java
31 */
32
33class BadTest {
34    static class Main {
35
36        static <B> List<B> nil() { return new List<B>(); }
37        static <A> List<A> cons(A x, List<A> xs) { return xs.prepend(x); }
38        static <A> Cell<A> makeCell(A x) { return new Cell<A>(x); }
39        static <A> A id(A x) { return x; }
40
41        public static void main(String[] args) {
42            List<Cell<String>> as = nil().prepend(makeCell(null));
43            List<Cell<String>> bs = cons(makeCell(null), nil());
44            List<String> xs = id(nil());
45            List<String> ys = cons("abc", id(nil()));
46            List<String> zs = id(nil()).prepend("abc");
47            List<Cell<String>> us = id(nil()).prepend(makeCell(null));
48            List<Cell<String>> vs = cons(makeCell(null), id(nil()));
49            System.out.println(nil() instanceof List<String>);
50            nil();
51        }
52
53    }
54}
55