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d68f2a6b71
```
error[E0382]: use of moved value: `t`
--> $DIR/use_of_moved_value_copy_suggestions.rs:7:9
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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
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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
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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
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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;
| +
```
85 lines
3.0 KiB
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85 lines
3.0 KiB
Plaintext
error[E0382]: use of moved value: `f`
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--> $DIR/borrow-closures-instead-of-move.rs:3:22
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LL | fn takes_fn(f: impl Fn()) {
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| - move occurs because `f` has type `impl Fn()`, which does not implement the `Copy` trait
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LL | loop {
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|
| ---- inside of this loop
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LL | takes_fnonce(f);
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| ^ value moved here, in previous iteration of loop
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note: consider changing this parameter type in function `takes_fnonce` to borrow instead if owning the value isn't necessary
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--> $DIR/borrow-closures-instead-of-move.rs:34:20
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LL | fn takes_fnonce(_: impl FnOnce()) {}
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| ------------ ^^^^^^^^^^^^^ this parameter takes ownership of the value
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| |
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| in this function
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help: if `impl Fn()` implemented `Clone`, you could clone the value
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--> $DIR/borrow-closures-instead-of-move.rs:1:16
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LL | fn takes_fn(f: impl Fn()) {
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| ^^^^^^^^^ consider constraining this type parameter with `Clone`
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LL | loop {
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LL | takes_fnonce(f);
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| - you could clone this value
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help: consider borrowing `f`
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LL | takes_fnonce(&f);
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| +
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error[E0382]: use of moved value: `m`
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--> $DIR/borrow-closures-instead-of-move.rs:14:18
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LL | fn takes_fn_mut(m: impl FnMut()) {
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| - move occurs because `m` has type `impl FnMut()`, which does not implement the `Copy` trait
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LL | if maybe() {
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LL | takes_fnonce(m);
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| - value moved here
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...
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LL | takes_fnonce(m);
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| ^ value used here after move
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note: consider changing this parameter type in function `takes_fnonce` to borrow instead if owning the value isn't necessary
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--> $DIR/borrow-closures-instead-of-move.rs:34:20
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LL | fn takes_fnonce(_: impl FnOnce()) {}
|
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| ------------ ^^^^^^^^^^^^^ this parameter takes ownership of the value
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| |
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| in this function
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help: if `impl FnMut()` implemented `Clone`, you could clone the value
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--> $DIR/borrow-closures-instead-of-move.rs:9:20
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LL | fn takes_fn_mut(m: impl FnMut()) {
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| ^^^^^^^^^^^^ consider constraining this type parameter with `Clone`
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LL | if maybe() {
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LL | takes_fnonce(m);
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| - you could clone this value
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help: consider mutably borrowing `m`
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LL | takes_fnonce(&mut m);
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| ++++
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error[E0382]: borrow of moved value: `closure`
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--> $DIR/borrow-closures-instead-of-move.rs:25:5
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LL | takes_fnonce(closure);
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| ------- value moved here
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LL |
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LL | closure();
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| ^^^^^^^ value borrowed here after move
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note: closure cannot be moved more than once as it is not `Copy` due to moving the variable `x` out of its environment
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--> $DIR/borrow-closures-instead-of-move.rs:21:9
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LL | x += 1;
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| ^
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help: consider mutably borrowing `closure`
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LL | takes_fnonce(&mut closure);
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| ++++
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error: aborting due to 3 previous errors
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For more information about this error, try `rustc --explain E0382`.
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