rust/tests/ui/issues/issue-29861.rs
2024-03-07 06:27:09 +00:00

22 lines
430 B
Rust

pub trait MakeRef<'a> {
type Ref;
}
impl<'a, T: 'a> MakeRef<'a> for T {
type Ref = &'a T;
}
pub trait MakeRef2 {
type Ref2;
}
impl<'a, T: 'a> MakeRef2 for T {
//~^ ERROR the lifetime parameter `'a` is not constrained
type Ref2 = <T as MakeRef<'a>>::Ref;
}
fn foo() -> <String as MakeRef2>::Ref2 { &String::from("foo") }
//~^ ERROR temporary value dropped while borrowed
fn main() {
println!("{}", foo());
}