mirror of https://github.com/rust-lang/rust
82 lines
2.7 KiB
Plaintext
82 lines
2.7 KiB
Plaintext
warning: lifetime parameter `'b` never used
|
|
--> $DIR/regions-static-bound.rs:3:17
|
|
|
|
|
LL | fn static_id<'a,'b>(t: &'a ()) -> &'static () where 'a: 'static { t }
|
|
| -^^
|
|
| |
|
|
| help: elide the unused lifetime
|
|
|
|
|
note: the lint level is defined here
|
|
--> $DIR/regions-static-bound.rs:1:9
|
|
|
|
|
LL | #![warn(unused_lifetimes, redundant_lifetimes)]
|
|
| ^^^^^^^^^^^^^^^^
|
|
|
|
warning: unnecessary lifetime parameter `'a`
|
|
--> $DIR/regions-static-bound.rs:3:14
|
|
|
|
|
LL | fn static_id<'a,'b>(t: &'a ()) -> &'static () where 'a: 'static { t }
|
|
| ^^
|
|
|
|
|
= note: you can use the `'static` lifetime directly, in place of `'a`
|
|
note: the lint level is defined here
|
|
--> $DIR/regions-static-bound.rs:1:27
|
|
|
|
|
LL | #![warn(unused_lifetimes, redundant_lifetimes)]
|
|
| ^^^^^^^^^^^^^^^^^^^
|
|
|
|
warning: unnecessary lifetime parameter `'a`
|
|
--> $DIR/regions-static-bound.rs:7:23
|
|
|
|
|
LL | fn static_id_indirect<'a,'b>(t: &'a ()) -> &'static ()
|
|
| ^^
|
|
|
|
|
= note: you can use the `'static` lifetime directly, in place of `'a`
|
|
|
|
warning: unnecessary lifetime parameter `'b`
|
|
--> $DIR/regions-static-bound.rs:7:26
|
|
|
|
|
LL | fn static_id_indirect<'a,'b>(t: &'a ()) -> &'static ()
|
|
| ^^
|
|
|
|
|
= note: you can use the `'static` lifetime directly, in place of `'b`
|
|
|
|
error: lifetime may not live long enough
|
|
--> $DIR/regions-static-bound.rs:13:5
|
|
|
|
|
LL | fn static_id_wrong_way<'a>(t: &'a ()) -> &'static () where 'static: 'a {
|
|
| -- lifetime `'a` defined here
|
|
LL | t
|
|
| ^ returning this value requires that `'a` must outlive `'static`
|
|
|
|
error[E0521]: borrowed data escapes outside of function
|
|
--> $DIR/regions-static-bound.rs:18:5
|
|
|
|
|
LL | fn error(u: &(), v: &()) {
|
|
| - - let's call the lifetime of this reference `'1`
|
|
| |
|
|
| `u` is a reference that is only valid in the function body
|
|
LL | static_id(&u);
|
|
| ^^^^^^^^^^^^^
|
|
| |
|
|
| `u` escapes the function body here
|
|
| argument requires that `'1` must outlive `'static`
|
|
|
|
error[E0521]: borrowed data escapes outside of function
|
|
--> $DIR/regions-static-bound.rs:20:5
|
|
|
|
|
LL | fn error(u: &(), v: &()) {
|
|
| - - let's call the lifetime of this reference `'2`
|
|
| |
|
|
| `v` is a reference that is only valid in the function body
|
|
...
|
|
LL | static_id_indirect(&v);
|
|
| ^^^^^^^^^^^^^^^^^^^^^^
|
|
| |
|
|
| `v` escapes the function body here
|
|
| argument requires that `'2` must outlive `'static`
|
|
|
|
error: aborting due to 3 previous errors; 4 warnings emitted
|
|
|
|
For more information about this error, try `rustc --explain E0521`.
|