mirror of
https://github.com/rust-lang/rust
synced 2024-09-06 01:11:17 +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
|
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;
| +
```
93 lines
3.7 KiB
Plaintext
93 lines
3.7 KiB
Plaintext
error[E0502]: cannot borrow `u` (via `u.y`) as immutable because it is also borrowed as mutable (via `u.x`)
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--> $DIR/union-borrow-move-parent-sibling.rs:53:13
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LL | let a = &mut (*u.x).0;
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| --- mutable borrow occurs here (via `u.x`)
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LL | let b = &u.y;
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| ^^^^ immutable borrow of `u.y` -- which overlaps with `u.x` -- occurs here
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LL | use_borrow(a);
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| - mutable borrow later used here
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= note: `u.y` is a field of the union `U`, so it overlaps the field `u.x`
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error[E0507]: cannot move out of dereference of `ManuallyDrop<((MockVec<u8>, MockVec<u8>), MockVec<u8>)>`
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--> $DIR/union-borrow-move-parent-sibling.rs:59:13
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LL | let a = u.x.0;
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| ^^^^^ move occurs because value has type `(MockVec<u8>, MockVec<u8>)`, which does not implement the `Copy` trait
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help: consider borrowing here
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LL | let a = &u.x.0;
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| +
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error[E0382]: use of moved value: `u`
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--> $DIR/union-borrow-move-parent-sibling.rs:61:13
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LL | let u = U { x: ManuallyDrop::new(((MockVec::new(), MockVec::new()), MockVec::new())) };
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| - move occurs because `u` has type `U`, which does not implement the `Copy` trait
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LL | let a = u.x.0;
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LL | let a = u.x;
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| --- value moved here
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LL | let b = u.y;
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| ^^^ value used here after move
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error[E0502]: cannot borrow `u` (via `u.y`) as immutable because it is also borrowed as mutable (via `u.x`)
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--> $DIR/union-borrow-move-parent-sibling.rs:67:13
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LL | let a = &mut ((*u.x).0).0;
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| --- mutable borrow occurs here (via `u.x`)
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LL | let b = &u.y;
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| ^^^^ immutable borrow of `u.y` -- which overlaps with `u.x` -- occurs here
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LL | use_borrow(a);
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| - mutable borrow later used here
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= note: `u.y` is a field of the union `U`, so it overlaps the field `u.x`
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error[E0507]: cannot move out of dereference of `ManuallyDrop<((MockVec<u8>, MockVec<u8>), MockVec<u8>)>`
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--> $DIR/union-borrow-move-parent-sibling.rs:73:13
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LL | let a = (u.x.0).0;
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| ^^^^^^^^^ move occurs because value has type `MockVec<u8>`, which does not implement the `Copy` trait
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note: if `MockVec<u8>` implemented `Clone`, you could clone the value
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--> $DIR/union-borrow-move-parent-sibling.rs:25:1
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LL | struct MockVec<T> {
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| ^^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type
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...
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LL | let a = (u.x.0).0;
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| --------- you could clone this value
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help: consider borrowing here
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LL | let a = &(u.x.0).0;
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| +
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error[E0382]: use of moved value: `u`
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--> $DIR/union-borrow-move-parent-sibling.rs:75:13
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LL | let u = U { x: ManuallyDrop::new(((MockVec::new(), MockVec::new()), MockVec::new())) };
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| - move occurs because `u` has type `U`, which does not implement the `Copy` trait
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LL | let a = (u.x.0).0;
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LL | let a = u.x;
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| --- value moved here
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LL | let b = u.y;
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| ^^^ value used here after move
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error[E0502]: cannot borrow `u` (via `u.x`) as immutable because it is also borrowed as mutable (via `u.y`)
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--> $DIR/union-borrow-move-parent-sibling.rs:81:13
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LL | let a = &mut *u.y;
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| --- mutable borrow occurs here (via `u.y`)
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LL | let b = &u.x;
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| ^^^^ immutable borrow of `u.x` -- which overlaps with `u.y` -- occurs here
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LL | use_borrow(a);
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| - mutable borrow later used here
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= note: `u.x` is a field of the union `U`, so it overlaps the field `u.y`
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error: aborting due to 7 previous errors
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Some errors have detailed explanations: E0382, E0502, E0507.
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For more information about an error, try `rustc --explain E0382`.
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