1 /*
 2  * Copyright (c) 2021, 2024, Oracle and/or its affiliates. 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
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
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23 
24 /*
25  * @test
26  * @summary Test substitutability of inner class and anonymous class that
27  *          has the enclosing instance and possibly other captured outer locals
28  * @enablePreview
29  * @run junit/othervm Nest
30  */
31 
32 import jdk.internal.vm.annotation.ImplicitlyConstructible;
33 import org.junit.jupiter.api.Test;
34 import static org.junit.jupiter.api.Assertions.*;
35 public class Nest {
36     static interface I {
37         String toString();
38     }
39 
40     static I of(int value, Object next) {
41         // anonymous class capturing outer locals
42         return new value I() {
43             public String toString() {
44                 return value + " -> " + next;
45             }
46         };
47     }
48 
49     @Test
50     public void test1() {
51         assertEquals(Nest.of(1, null), Nest.of(1, null));
52         assertNotEquals(Nest.of(1, null), Nest.of(2, null));
53     }
54 
55     @Test
56     public void test2() {
57         Outer n = new Outer(1);
58         Outer.Inner inner = n.new Inner(10);
59         Outer n1 = new Outer(1);
60         Outer n2 = new Outer(2);
61         // o1.new Inner(1) == o2.new Inner(1) iff o1 == o2
62         assertEquals(n1.new Inner(10), inner);
63         assertEquals(n2.new Inner(10), new Outer(2).new Inner(10));
64     }
65 
66     @ImplicitlyConstructible
67     value class Outer {
68         final int i;
69         Outer(int i) {
70             this.i = i;
71         }
72 
73         @ImplicitlyConstructible
74         value class Inner {
75             final int ic;
76             Inner(int ic) {
77                 this.ic = ic;
78             }
79         }
80     }
81 }