1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
/*
* @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; }
}
|
