3 fn elided(x: &i32) -> impl Copy { x }
4 //~^ ERROR cannot infer an appropriate lifetime
6 fn explicit<'a>(x: &'a i32) -> impl Copy { x }
7 //~^ ERROR cannot infer an appropriate lifetime
9 fn elided2(x: &i32) -> impl Copy + 'static { x }
10 //~^ ERROR cannot infer an appropriate lifetime
12 fn explicit2<'a>(x: &'a i32) -> impl Copy + 'static { x }
13 //~^ ERROR cannot infer an appropriate lifetime
15 fn foo<'a>(x: &i32) -> impl Copy + 'a { x }
16 //~^ ERROR explicit lifetime required in the type of `x`
18 fn elided3(x: &i32) -> Box<dyn Debug> { Box::new(x) }
19 //~^ ERROR cannot infer an appropriate lifetime
21 fn explicit3<'a>(x: &'a i32) -> Box<dyn Debug> { Box::new(x) }
22 //~^ ERROR cannot infer an appropriate lifetime
24 fn elided4(x: &i32) -> Box<dyn Debug + 'static> { Box::new(x) }
25 //~^ ERROR cannot infer an appropriate lifetime
27 fn explicit4<'a>(x: &'a i32) -> Box<dyn Debug + 'static> { Box::new(x) }
28 //~^ ERROR cannot infer an appropriate lifetime
30 trait LifetimeTrait<'a> {}
31 impl<'a> LifetimeTrait<'a> for &'a i32 {}
33 fn with_bound<'a>(x: &'a i32) -> impl LifetimeTrait<'a> + 'static { x }
34 //~^ ERROR cannot infer an appropriate lifetime
36 // Tests that a closure type containing 'b cannot be returned from a type where
37 // only 'a was expected.
38 fn move_lifetime_into_fn<'a, 'b>(x: &'a u32, y: &'b u32) -> impl Fn(&'a u32) {
39 //~^ ERROR lifetime mismatch
40 move |_| println!("{}", y)
43 fn ty_param_wont_outlive_static<T:Debug>(x: T) -> impl Debug + 'static {
44 //~^ ERROR the parameter type `T` may not live long enough