jdk-24/langtools/test/tools/javac/lambda/MethodReference41.java

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/*
 * @test
 * @bug 8003280
 * @summary Add lambda tests
 *  check that diamond inference is applied when using raw constructor reference qualifier
 * @run main MethodReference41
 */
public class MethodReference41 {

    static int assertionCount = 0;

    static void assertTrue(boolean cond) {
        assertionCount++;
        if (!cond)
            throw new AssertionError();
    }

    interface SAM1 {
       void m(String s);
    }

    interface SAM2 {
       void m(Integer s);
    }

    interface SAM3 {
       void m(Object o);
    }

    static class Foo<X extends Number> {
        Foo(X x) { }
    }


    static void m(SAM1 s) { assertTrue(false); }
    static void m(SAM2 s) { assertTrue(true); }
    static void m(SAM3 s) { assertTrue(false); }

    public static void main(String[] args) {
        m(Foo::new);
        assertTrue(assertionCount == 1);
    }
}