[rustc.git] / src / test / ui / issues / issue-20763-2.rs

// check-pass
#![allow(dead_code)]
// pretty-expanded FIXME #23616

trait T0 {
    type O;
    fn dummy(&self) { }
}

struct S<A>(A);
impl<A> T0 for S<A> { type O = A; }

trait T1: T0 {
    // this looks okay but as we see below, `f` is unusable
    fn m0<F: Fn(<Self as T0>::O) -> bool>(self, f: F) -> bool;
}

// complains about mismatched types: <S<A> as T0>::O vs. A
impl<A> T1 for S<A>
{
    fn m0<F: Fn(<Self as T0>::O) -> bool>(self, f: F) -> bool { f(self.0) }
}

fn main() { }
Commit	Line	Data
60c5eb7d	1	// check-pass
0bf4aa26	2	#![allow(dead_code)]
c34b1796 AL	3	// pretty-expanded FIXME #23616
c34b1796 AL	4
85aaf69f SL	5	trait T0 {
	6	type O;
	7	fn dummy(&self) { }
	8	}
223e47cc	9
85aaf69f SL	10	struct S<A>(A);
85aaf69f SL	11	impl<A> T0 for S<A> { type O = A; }
1a4d82fc	12
85aaf69f SL	13	trait T1: T0 {
	14	// this looks okay but as we see below, `f` is unusable
	15	fn m0<F: Fn(<Self as T0>::O) -> bool>(self, f: F) -> bool;
	16	}
	17
	18	// complains about mismatched types: <S<A> as T0>::O vs. A
	19	impl<A> T1 for S<A>
	20	{
	21	fn m0<F: Fn(<Self as T0>::O) -> bool>(self, f: F) -> bool { f(self.0) }
	22	}
223e47cc LB	23
223e47cc LB	24	fn main() { }