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// 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>;
fn f<'a: 'static>(t: &'a str) -> X<'a> {
//~^ WARNING unnecessary lifetime parameter
t
//~^ ERROR non-defining opaque type use
}
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);
}
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