| // Make sure that we check that impl trait types implement the traits that they | |
| // claim to. | |
| #![feature(type_alias_impl_trait)] | |
| type X<'a> = impl Into<&'static str> + From<&'a str>; | |
| //~^ ERROR mismatched types | |
| fn f<'a: 'static>(t: &'a str) -> X<'a> { | |
| //~^ WARNING unnecessary lifetime parameter | |
| t | |
| } | |
| fn extend_lt<'a>(o: &'a str) -> &'static str { | |
| X::<'_>::from(o).into() | |
| } | |
| fn main() { | |
| let r = | |
| { | |
| let s = "abcdef".to_string(); | |
| extend_lt(&s) | |
| }; | |
| println!("{}", r); | |
| } |