mirror of
https://github.com/rust-lang/rust
synced 2024-10-14 20:46:49 +00:00
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
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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
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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;
| +
```
87 lines
2.7 KiB
Rust
87 lines
2.7 KiB
Rust
// Regression test for issue #72649
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// Tests that we don't emit spurious
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// 'value moved in previous iteration of loop' message
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struct NonCopy;
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//~^ NOTE if `NonCopy` implemented `Clone`
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//~| NOTE if `NonCopy` implemented `Clone`
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//~| NOTE if `NonCopy` implemented `Clone`
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//~| NOTE if `NonCopy` implemented `Clone`
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//~| NOTE consider implementing `Clone` for this type
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//~| NOTE consider implementing `Clone` for this type
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//~| NOTE consider implementing `Clone` for this type
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//~| NOTE consider implementing `Clone` for this type
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fn good() {
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loop {
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let value = NonCopy{};
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let _used = value;
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}
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}
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fn moved_here_1() {
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loop {
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let value = NonCopy{};
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//~^ NOTE move occurs because `value` has type `NonCopy`, which does not implement the `Copy` trait
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let _used = value;
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//~^ NOTE value moved here
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//~| NOTE you could clone this value
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let _used2 = value; //~ ERROR use of moved value: `value`
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//~^ NOTE value used here after move
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}
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}
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fn moved_here_2() {
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let value = NonCopy{};
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//~^ NOTE move occurs because `value` has type `NonCopy`, which does not implement the `Copy` trait
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loop { //~ NOTE inside of this loop
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let _used = value;
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//~^ NOTE value moved here
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//~| NOTE you could clone this value
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loop {
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let _used2 = value; //~ ERROR use of moved value: `value`
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//~^ NOTE value used here after move
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}
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}
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}
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fn moved_loop_1() {
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let value = NonCopy{};
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//~^ NOTE move occurs because `value` has type `NonCopy`, which does not implement the `Copy` trait
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loop { //~ NOTE inside of this loop
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let _used = value; //~ ERROR use of moved value: `value`
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//~^ NOTE value moved here, in previous iteration of loop
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//~| NOTE you could clone this value
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}
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}
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fn moved_loop_2() {
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let mut value = NonCopy{};
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//~^ NOTE move occurs because `value` has type `NonCopy`, which does not implement the `Copy` trait
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let _used = value;
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value = NonCopy{};
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loop { //~ NOTE inside of this loop
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let _used2 = value; //~ ERROR use of moved value: `value`
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//~^ NOTE value moved here, in previous iteration of loop
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//~| NOTE you could clone this value
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}
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}
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fn uninit_1() {
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loop {
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let value: NonCopy; //~ NOTE declared here
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let _used = value; //~ ERROR binding `value` isn't initialized
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//~^ NOTE `value` used here but it isn't initialized
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}
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}
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fn uninit_2() {
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let mut value: NonCopy; //~ NOTE declared here
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loop {
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let _used = value; //~ ERROR binding `value` isn't initialized
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//~^ NOTE `value` used here but it isn't initialized
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}
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}
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fn main() {}
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