rust/tests/ui/marker_trait_attr/unsound-overlap.rs
2024-03-31 20:44:30 -04:00

27 lines
451 B
Rust

#![feature(marker_trait_attr)]
#[marker]
trait A {}
trait B {}
impl<T: A> B for T {}
impl<T: B> A for T {}
impl A for &str {}
//~^ ERROR type annotations needed: cannot satisfy `&str: A`
impl<T: A + B> A for (T,) {}
trait TraitWithAssoc {
type Assoc;
}
impl<T: A> TraitWithAssoc for T {
type Assoc = T;
}
impl TraitWithAssoc for ((&str,),) {
//~^ ERROR conflicting implementations
type Assoc = ((&'static str,),);
}
fn main() {}