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|
error[E0700]: hidden type for `impl Copy` captures lifetime that does not appear in bounds
--> $DIR/must_outlive_least_region_or_bound.rs:3:35
|
LL | fn elided(x: &i32) -> impl Copy { x }
| ---- --------- ^
| | |
| | opaque type defined here
| hidden type `&i32` captures the anonymous lifetime defined here
|
help: to declare that `impl Copy` captures `'_`, you can add an explicit `'_` lifetime bound
|
LL | fn elided(x: &i32) -> impl Copy + '_ { x }
| ++++
error[E0700]: hidden type for `impl Copy` captures lifetime that does not appear in bounds
--> $DIR/must_outlive_least_region_or_bound.rs:6:44
|
LL | fn explicit<'a>(x: &'a i32) -> impl Copy { x }
| -- --------- ^
| | |
| | opaque type defined here
| hidden type `&'a i32` captures the lifetime `'a` as defined here
|
help: to declare that `impl Copy` captures `'a`, you can add an explicit `'a` lifetime bound
|
LL | fn explicit<'a>(x: &'a i32) -> impl Copy + 'a { x }
| ++++
error: lifetime may not live long enough
--> $DIR/must_outlive_least_region_or_bound.rs:9:46
|
LL | fn elided2(x: &i32) -> impl Copy + 'static { x }
| - ^ returning this value requires that `'1` must outlive `'static`
| |
| let's call the lifetime of this reference `'1`
|
help: consider changing `impl Copy + 'static`'s explicit `'static` bound to the lifetime of argument `x`
|
LL | fn elided2(x: &i32) -> impl Copy + '_ { x }
| ~~
help: alternatively, add an explicit `'static` bound to this reference
|
LL | fn elided2(x: &'static i32) -> impl Copy + 'static { x }
| ~~~~~~~~~~~~
error: lifetime may not live long enough
--> $DIR/must_outlive_least_region_or_bound.rs:12:55
|
LL | fn explicit2<'a>(x: &'a i32) -> impl Copy + 'static { x }
| -- lifetime `'a` defined here ^ returning this value requires that `'a` must outlive `'static`
|
help: consider changing `impl Copy + 'static`'s explicit `'static` bound to the lifetime of argument `x`
|
LL | fn explicit2<'a>(x: &'a i32) -> impl Copy + 'a { x }
| ~~
help: alternatively, add an explicit `'static` bound to this reference
|
LL | fn explicit2<'a>(x: &'static i32) -> impl Copy + 'static { x }
| ~~~~~~~~~~~~
error[E0621]: explicit lifetime required in the type of `x`
--> $DIR/must_outlive_least_region_or_bound.rs:15:41
|
LL | fn foo<'a>(x: &i32) -> impl Copy + 'a { x }
| ---- ^ lifetime `'a` required
| |
| help: add explicit lifetime `'a` to the type of `x`: `&'a i32`
error: lifetime may not live long enough
--> $DIR/must_outlive_least_region_or_bound.rs:26:55
|
LL | fn elided5(x: &i32) -> (Box<dyn Debug>, impl Debug) { (Box::new(x), x) }
| - ^^^^^^^^^^^^^^^^ returning this value requires that `'1` must outlive `'static`
| |
| let's call the lifetime of this reference `'1`
|
help: to declare that the trait object captures data from argument `x`, you can add an explicit `'_` lifetime bound
|
LL | fn elided5(x: &i32) -> (Box<dyn Debug + '_>, impl Debug) { (Box::new(x), x) }
| ++++
help: to declare that `impl Debug` captures data from argument `x`, you can add an explicit `'_` lifetime bound
|
LL | fn elided5(x: &i32) -> (Box<dyn Debug>, impl Debug + '_) { (Box::new(x), x) }
| ++++
error: lifetime may not live long enough
--> $DIR/must_outlive_least_region_or_bound.rs:32:69
|
LL | fn with_bound<'a>(x: &'a i32) -> impl LifetimeTrait<'a> + 'static { x }
| -- lifetime `'a` defined here ^ returning this value requires that `'a` must outlive `'static`
|
help: consider changing `impl LifetimeTrait<'a> + 'static`'s explicit `'static` bound to the lifetime of argument `x`
|
LL | fn with_bound<'a>(x: &'a i32) -> impl LifetimeTrait<'a> + 'a { x }
| ~~
help: alternatively, add an explicit `'static` bound to this reference
|
LL | fn with_bound<'a>(x: &'static i32) -> impl LifetimeTrait<'a> + 'static { x }
| ~~~~~~~~~~~~
error[E0700]: hidden type for `impl Fn(&'a u32)` captures lifetime that does not appear in bounds
--> $DIR/must_outlive_least_region_or_bound.rs:38:5
|
LL | fn move_lifetime_into_fn<'a, 'b>(x: &'a u32, y: &'b u32) -> impl Fn(&'a u32) {
| -- ---------------- opaque type defined here
| |
| hidden type `[closure@$DIR/must_outlive_least_region_or_bound.rs:38:5: 38:13]` captures the lifetime `'b` as defined here
LL | move |_| println!("{}", y)
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
help: to declare that `impl Fn(&'a u32)` captures `'b`, you can add an explicit `'b` lifetime bound
|
LL | fn move_lifetime_into_fn<'a, 'b>(x: &'a u32, y: &'b u32) -> impl Fn(&'a u32) + 'b {
| ++++
error[E0310]: the parameter type `T` may not live long enough
--> $DIR/must_outlive_least_region_or_bound.rs:43:5
|
LL | x
| ^ ...so that the type `T` will meet its required lifetime bounds
|
help: consider adding an explicit lifetime bound...
|
LL | fn ty_param_wont_outlive_static<T:Debug + 'static>(x: T) -> impl Debug + 'static {
| +++++++++
error: aborting due to 9 previous errors
Some errors have detailed explanations: E0310, E0621, E0700.
For more information about an error, try `rustc --explain E0310`.
|
