| 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") } | |
| fn main() { | |
| println!("{}", foo()); | |
| } |