rust/tests/ui/borrowck/borrowck-overloaded-call.stderr
Esteban Küber d68f2a6b71 Mention when type parameter could be Clone
```
error[E0382]: use of moved value: `t`
  --> $DIR/use_of_moved_value_copy_suggestions.rs:7:9
   |
LL | fn duplicate_t<T>(t: T) -> (T, T) {
   |                   - move occurs because `t` has type `T`, which does not implement the `Copy` trait
...
LL |     (t, t)
   |      -  ^ value used here after move
   |      |
   |      value moved here
   |
help: if `T` implemented `Clone`, you could clone the value
  --> $DIR/use_of_moved_value_copy_suggestions.rs:4:16
   |
LL | fn duplicate_t<T>(t: T) -> (T, T) {
   |                ^ consider constraining this type parameter with `Clone`
...
LL |     (t, t)
   |      - you could clone this value
help: consider restricting type parameter `T`
   |
LL | fn duplicate_t<T: Copy>(t: T) -> (T, T) {
   |                 ++++++
```

The `help` is new. On ADTs, we also extend the output with span labels:

```
error[E0507]: cannot move out of static item `FOO`
  --> $DIR/issue-17718-static-move.rs:6:14
   |
LL |     let _a = FOO;
   |              ^^^ move occurs because `FOO` has type `Foo`, which does not implement the `Copy` trait
   |
note: if `Foo` implemented `Clone`, you could clone the value
  --> $DIR/issue-17718-static-move.rs:1:1
   |
LL | struct Foo;
   | ^^^^^^^^^^ consider implementing `Clone` for this type
...
LL |     let _a = FOO;
   |              --- you could clone this value
help: consider borrowing here
   |
LL |     let _a = &FOO;
   |              +
```
2024-04-24 22:21:15 +00:00

46 lines
1.4 KiB
Plaintext

error[E0502]: cannot borrow `s` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-overloaded-call.rs:59:5
|
LL | let sp = &mut s;
| ------ mutable borrow occurs here
LL | s(3);
| ^ immutable borrow occurs here
LL | use_mut(sp);
| -- mutable borrow later used here
error[E0596]: cannot borrow `s` as mutable, as it is not declared as mutable
--> $DIR/borrowck-overloaded-call.rs:67:5
|
LL | s(3);
| ^ cannot borrow as mutable
|
help: consider changing this to be mutable
|
LL | let mut s = SFnMut {
| +++
error[E0382]: use of moved value: `s`
--> $DIR/borrowck-overloaded-call.rs:75:5
|
LL | let s = SFnOnce {
| - move occurs because `s` has type `SFnOnce`, which does not implement the `Copy` trait
...
LL | s(" world".to_string());
| - value moved here
LL | s(" world".to_string());
| ^ value used here after move
|
note: if `SFnOnce` implemented `Clone`, you could clone the value
--> $DIR/borrowck-overloaded-call.rs:41:1
|
LL | struct SFnOnce {
| ^^^^^^^^^^^^^^ consider implementing `Clone` for this type
...
LL | s(" world".to_string());
| - you could clone this value
error: aborting due to 3 previous errors
Some errors have detailed explanations: E0382, E0502, E0596.
For more information about an error, try `rustc --explain E0382`.