1/* 2 * @test /nodynamiccopyright/ 3 * @bug 8034223 4 * @summary Most-specific testing for nested functional interface types 5 * @compile/fail/ref=MostSpecific14.out -XDrawDiagnostics MostSpecific14.java 6 */ 7class MostSpecific14 { 8 interface ToNumber { Number get(); } 9 interface ToToNumber { ToNumber get(); } 10 interface Factory<T> { T get(); } 11 12 void m1(Factory<Factory<Object>> f) {} 13 void m1(ToToNumber f) {} 14 15 void m2(Factory<Factory<Number>> f) {} 16 void m2(ToToNumber f) {} 17 18 void m3(Factory<Factory<Integer>> f) {} 19 void m3(ToToNumber f) {} 20 21 22 void test() { 23 m1(() -> () -> 23); // ok: choose ToToNumber 24 m2(() -> () -> 23); // error: ambiguous 25 m3(() -> () -> 23); // ok: choose Factory<Factory<Integer>> 26 27 m1(() -> this::getInteger); // ok: choose ToToNumber 28 m2(() -> this::getInteger); // error: ambiguous 29 m3(() -> this::getInteger); // ok: choose Factory<Factory<Integer>> 30 } 31 32 Integer getInteger() { return 23; } 33}