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![Esteban Küber](/assets/img/avatar_default.png)
``` 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; | + ```
14 lines
485 B
Rust
14 lines
485 B
Rust
struct NoCopy; //~ NOTE if `NoCopy` implemented `Clone`, you could clone the value
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//~^ NOTE consider implementing `Clone` for this type
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fn main() {
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let x = NoCopy;
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//~^ NOTE move occurs because `x` has type `NoCopy`
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let f = move || { let y = x; };
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//~^ NOTE value moved into closure here
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//~| NOTE variable moved due to use in closure
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//~| NOTE you could clone this value
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let z = x;
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//~^ ERROR use of moved value: `x`
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//~| NOTE value used here after move
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}
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