Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * @test /nodynamiccopyright/

  * @bug 8034223

  * @summary Most-specific testing for nested functional interface types

  * @compile/fail/ref=MostSpecific14.out -XDrawDiagnostics MostSpecific14.java

  */

 class MostSpecific14 {

     interface ToNumber { Number get(); }

     interface ToToNumber { ToNumber get(); }

     interface Factory<T> { T get(); }

     void m1(Factory<Factory<Object>> f) {}

     void m1(ToToNumber f) {}

     void m2(Factory<Factory<Number>> f) {}

     void m2(ToToNumber f) {}

     void m3(Factory<Factory<Integer>> f) {}

     void m3(ToToNumber f) {}

     void test() {

         m1(() -> () -> 23); // ok: choose ToToNumber

         m2(() -> () -> 23); // error: ambiguous

         m3(() -> () -> 23); // ok: choose Factory<Factory<Integer>>

         m1(() -> this::getInteger); // ok: choose ToToNumber

         m2(() -> this::getInteger); // error: ambiguous

         m3(() -> this::getInteger); // ok: choose Factory<Factory<Integer>>

     }

     Integer getInteger() { return 23; }

 }