rust/tests/ui/specialization/specialization-overlap-projection.rs
2023-01-11 09:32:08 +00:00

26 lines
586 B
Rust

// run-pass
// Test that impls on projected self types can resolve overlap, even when the
// projections involve specialization, so long as the associated type is
// provided by the most specialized impl.
#![feature(specialization)] //~ WARN the feature `specialization` is incomplete
trait Assoc {
type Output;
}
impl<T> Assoc for T {
default type Output = bool;
}
impl Assoc for u8 { type Output = u8; }
impl Assoc for u16 { type Output = u16; }
trait Foo {}
impl Foo for u32 {}
impl Foo for <u8 as Assoc>::Output {}
impl Foo for <u16 as Assoc>::Output {}
fn main() {}