| // revisions: func object clause |
| |
| #![allow(dead_code)] |
| #![feature(rustc_attrs)] |
| |
| trait Foo<'a> { |
| type Item; |
| } |
| |
| impl<'a> Foo<'a> for() { |
| type Item = (); |
| } |
| |
| // Check that appearing in a projection input in the argument is not enough: |
| #[cfg(func)] |
| fn func1(_: for<'a> fn(<() as Foo<'a>>::Item) -> &'a i32) { |
| //[func]~^ ERROR E0581 |
| } |
| |
| // Check that appearing in a projection input in the return still |
| // causes an error: |
| #[cfg(func)] |
| fn func2(_: for<'a> fn() -> <() as Foo<'a>>::Item) { |
| //[func]~^ ERROR E0581 |
| } |
| |
| #[cfg(object)] |
| fn object1(_: Box<dyn for<'a> Fn(<() as Foo<'a>>::Item) -> &'a i32>) { |
| //[object]~^ ERROR E0582 |
| } |
| |
| #[cfg(object)] |
| fn object2(_: Box<dyn for<'a> Fn() -> <() as Foo<'a>>::Item>) { |
| //[object]~^ ERROR E0582 |
| } |
| |
| #[cfg(clause)] |
| fn clause1<T>() where T: for<'a> Fn(<() as Foo<'a>>::Item) -> &'a i32 { |
| //[clause]~^ ERROR `Output` references lifetime `'a` |
| } |
| |
| #[cfg(clause)] |
| fn clause2<T>() where T: for<'a> Fn() -> <() as Foo<'a>>::Item { |
| //[clause]~^ ERROR `Output` references lifetime `'a` |
| } |
| |
| #[rustc_error] |
| fn main() { } //[ok]~ ERROR compilation successful |