rust/tests/ui/nll/ty-outlives/ty-param-fn.rs

37 lines
555 B
Rust

#![allow(warnings)]
use std::fmt::Debug;
fn no_region<'a, T>(x: Box<T>) -> Box<Debug + 'a>
where
T: Debug,
{
x
//~^ ERROR the parameter type `T` may not live long enough
}
fn correct_region<'a, T>(x: Box<T>) -> Box<Debug + 'a>
where
T: 'a + Debug,
{
x
}
fn wrong_region<'a, 'b, T>(x: Box<T>) -> Box<Debug + 'a>
where
T: 'b + Debug,
{
x
//~^ ERROR the parameter type `T` may not live long enough
}
fn outlives_region<'a, 'b, T>(x: Box<T>) -> Box<Debug + 'a>
where
T: 'b + Debug,
'b: 'a,
{
x
}
fn main() {}