1 import jdk.incubator.code.Reflect;
 2 import jdk.incubator.code.CodeTransformer;
 3 import jdk.incubator.code.Op;
 4 import jdk.incubator.code.dialect.core.CoreOp;
 5 import jdk.incubator.code.interpreter.Interpreter;
 6 import org.junit.jupiter.api.Assertions;
 7 import org.junit.jupiter.api.Test;
 8 
 9 import java.lang.invoke.MethodHandles;
10 import java.lang.reflect.Method;
11 import java.util.Optional;
12 import java.util.stream.Stream;
13 
14 /*
15  * @test
16  * @modules jdk.incubator.code
17  * @run junit TestPatterns2
18  * @enablePreview */
19 public class TestPatterns2 {
20 
21     record R<T extends Number> (T n) {}
22 
23     @Reflect
24     static boolean f(Object o) {
25         return o instanceof R(Integer i);
26     }
27 
28     @Test
29     void test() {
30 
31         CoreOp.FuncOp f = getFuncOp("f");
32         System.out.println(f.toText());
33 
34         CoreOp.FuncOp lf = f.transform(CodeTransformer.LOWERING_TRANSFORMER);
35         System.out.println(lf.toText());
36 
37         R[] args = {new R(1), new R(2d)};
38         for (R arg : args) {
39             Assertions.assertEquals(f(arg), Interpreter.invoke(MethodHandles.lookup(), lf, arg));
40         }
41     }
42 
43     static CoreOp.FuncOp getFuncOp(String name) {
44         Optional<Method> om = Stream.of(TestPatterns2.class.getDeclaredMethods())
45                 .filter(m -> m.getName().equals(name))
46                 .findFirst();
47 
48         Method m = om.get();
49         return Op.ofMethod(m).get();
50     }
51 }