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 -source 1.5 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 }