mirror of
https://github.com/rust-lang/rust
synced 2024-10-01 06:14:33 +00:00
34 lines
999 B
Rust
34 lines
999 B
Rust
//@ revisions: current next
|
|
//@ ignore-compare-mode-next-solver (explicit revisions)
|
|
//@[next] compile-flags: -Znext-solver
|
|
//@[current] check-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;
|
|
//[next]~^ ERROR type annotations needed
|
|
}
|
|
|
|
impl Assoc for u8 { type Output = u8; }
|
|
//[next]~^ ERROR type annotations needed
|
|
impl Assoc for u16 { type Output = u16; }
|
|
//[next]~^ ERROR type annotations needed
|
|
|
|
trait Foo {}
|
|
impl Foo for u32 {}
|
|
impl Foo for <u8 as Assoc>::Output {}
|
|
//[next]~^ ERROR conflicting implementations of trait `Foo` for type `u32`
|
|
impl Foo for <u16 as Assoc>::Output {}
|
|
//[next]~^ ERROR conflicting implementations of trait `Foo` for type `u32`
|
|
|
|
fn main() {}
|