| // It's not yet clear how '_ and GATs should interact. |
| // Forbid it for now but proper support might be added |
| // at some point in the future. |
| |
| #![feature(anonymous_lifetime_in_impl_trait)] |
| trait Foo { |
| type Item<'a>; |
| } |
| |
| fn foo(x: &impl Foo<Item<'_> = u32>) { } |
| //~^ ERROR `'_` cannot be used here [E0637] |
| |
| // Ok: the anonymous lifetime is bound to the function. |
| fn bar(x: &impl for<'a> Foo<Item<'a> = &'_ u32>) { } |
| |
| // Ok: the anonymous lifetime is bound to the function. |
| fn baz(x: &impl for<'a> Foo<Item<'a> = &u32>) { } |
| |
| fn main() {} |
