1 /*
   2  * Copyright 2002-2004 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 4736963
  27  * @summary Positive regression test from odersky
  28  * @author odersky
  29  *
  30  * @compile  Test.java
  31  */
  32 
  33 class Test {
  34 
  35     static <B> List<B> nil() { return new List<B>(); }
  36     static <A> List<A> cons(A x, List<A> xs) { return xs.prepend(x); }
  37     static <A> Cell<A> makeCell(A x) { return new Cell<A>(x); }
  38     static <A> A id(A x) { return x; }
  39 
  40     public static void main(String[] args) {
  41         List<String> xs = nil();
  42         List<String> ys = cons("abc", Test.<String>nil());
  43         List<String> zs = Test.<String>nil().prepend("abc");
  44 
  45         System.out.println(nil());
  46         System.out.println(nil().length());
  47 
  48         System.out.println(cons("abc", nil()));
  49         System.out.println(nil().prepend("abc"));
  50         System.out.println(nil().prepend(makeCell(null)));
  51         System.out.println(cons(makeCell(null), nil()));
  52 
  53         System.out.println(id(nil()));
  54         System.out.println(id(nil()).length());
  55 
  56         System.out.println(cons("abc", id(nil())));
  57         System.out.println(id(nil()).prepend("abc"));
  58         System.out.println(id(nil()).prepend(makeCell(null)));
  59         System.out.println(cons(makeCell(null), id(nil())));
  60 
  61         List<String> a =
  62             args.length == 1 ? Test.<String>nil() : Test.<String>nil();
  63         a = (List<String>) Test.<String>nil();
  64     }
  65 
  66 }