test/langtools/tools/javac/lambda/MostSpecific22.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * @test
 * @bug 8143852
 * @summary Most specific inference constraints derived from both functional interface method parameters and tparam bounds
 */

public class MostSpecific22 {
    public static void main(String[] args) {
        new MostSpecific22().test();
    }

    interface F1<T> { <X extends T> Object apply(T arg); }
    interface F2 { <Y extends Number> String apply(Number arg); }

    static <T> T m1(F1<T> f) {
        throw new AssertionError("Less-specific method invocation.");
    }
    static Object m1(F2 f) { return null; }

    static String foo(Object in) { return "a"; }

    void test() {
        m1(MostSpecific22::foo);
    }

}