aoqi@0: /*
aoqi@0:  * @test /nodynamiccopyright/
aoqi@0:  * @bug 8034223
aoqi@0:  * @summary Most-specific testing for nested functional interface types
aoqi@0:  * @compile/fail/ref=MostSpecific14.out -XDrawDiagnostics MostSpecific14.java
aoqi@0:  */
aoqi@0: class MostSpecific14 {
aoqi@0:     interface ToNumber { Number get(); }
aoqi@0:     interface ToToNumber { ToNumber get(); }
aoqi@0:     interface Factory<T> { T get(); }
aoqi@0: 
aoqi@0:     void m1(Factory<Factory<Object>> f) {}
aoqi@0:     void m1(ToToNumber f) {}
aoqi@0: 
aoqi@0:     void m2(Factory<Factory<Number>> f) {}
aoqi@0:     void m2(ToToNumber f) {}
aoqi@0: 
aoqi@0:     void m3(Factory<Factory<Integer>> f) {}
aoqi@0:     void m3(ToToNumber f) {}
aoqi@0: 
aoqi@0: 
aoqi@0:     void test() {
aoqi@0:         m1(() -> () -> 23); // ok: choose ToToNumber
aoqi@0:         m2(() -> () -> 23); // error: ambiguous
aoqi@0:         m3(() -> () -> 23); // ok: choose Factory<Factory<Integer>>
aoqi@0: 
aoqi@0:         m1(() -> this::getInteger); // ok: choose ToToNumber
aoqi@0:         m2(() -> this::getInteger); // error: ambiguous
aoqi@0:         m3(() -> this::getInteger); // ok: choose Factory<Factory<Integer>>
aoqi@0:     }
aoqi@0: 
aoqi@0:     Integer getInteger() { return 23; }
aoqi@0: }