30 lines
662 B
Rust
30 lines
662 B
Rust
// compile-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 the bounds on F here not being required by the trait
|
|
impl<A> T1 for S<A> {
|
|
fn m0<F: Fn(A) -> bool>(self, f: F) -> bool { f(self.0) }
|
|
}
|
|
|
|
// // 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() { }
|