1 /*
 2  * Copyright (c) 2024, 2026, 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
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 
24 import jdk.incubator.code.Reflect;
25 import jdk.incubator.code.CodeTransformer;
26 import jdk.incubator.code.Op;
27 import jdk.incubator.code.dialect.core.CoreOp;
28 import org.junit.jupiter.api.Assertions;
29 import org.junit.jupiter.api.Test;
30 
31 import java.lang.invoke.MethodHandles;
32 import java.lang.reflect.Method;
33 import java.util.Optional;
34 import java.util.stream.Stream;
35 
36 /*
37  * @test
38  * @modules jdk.incubator.code
39  * @library lib
40  * @run junit TestPatterns2
41  * @run main Unreflect TestPatterns2
42  * @run junit TestPatterns2
43  * @enablePreview */
44 public class TestPatterns2 {
45 
46     record R<T extends Number> (T n) {}
47 
48     @Reflect
49     static boolean f(Object o) {
50         return o instanceof R(Integer i);
51     }
52 
53     @Test
54     void test() {
55 
56         CoreOp.FuncOp f = getFuncOp("f");
57         System.out.println(f.toText());
58 
59         CoreOp.FuncOp lf = f.transform(CodeTransformer.LOWERING_TRANSFORMER);
60         System.out.println(lf.toText());
61 
62         R[] args = {new R(1), new R(2d)};
63         for (R arg : args) {
64             Assertions.assertEquals(f(arg), Interpreter.invoke(MethodHandles.lookup(), lf, arg));
65         }
66     }
67 
68     static CoreOp.FuncOp getFuncOp(String name) {
69         Optional<Method> om = Stream.of(TestPatterns2.class.getDeclaredMethods())
70                 .filter(m -> m.getName().equals(name))
71                 .findFirst();
72 
73         Method m = om.get();
74         return Op.ofMethod(m).get();
75     }
76 }