65 lines
2.2 KiB
Plaintext
65 lines
2.2 KiB
Plaintext
|
error[E0502]: cannot borrow `*list` as mutable because it is also borrowed as immutable
|
||
|
|
--> $DIR/clone-on-ref.rs:7:5
|
||
|
|
|
|
||
|
|
LL | for v in list.iter() {
|
||
|
|
| ---- immutable borrow occurs here
|
||
|
|
LL | cloned_items.push(v.clone())
|
||
|
|
| ------- this call doesn't do anything, the result is still `&T` because `T` doesn't implement `Clone`
|
||
|
|
LL | }
|
||
|
|
LL | list.push(T::default());
|
||
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here
|
||
|
|
LL |
|
||
|
|
LL | drop(cloned_items);
|
||
|
|
| ------------ immutable borrow later used here
|
||
|
|
|
|
||
|
|
help: consider further restricting this bound
|
||
|
|
|
|
||
|
|
LL | fn foo<T: Default + Clone>(list: &mut Vec<T>) {
|
||
|
|
| +++++++
|
||
|
|
|
||
|
|
error[E0505]: cannot move out of `x` because it is borrowed
|
||
|
|
--> $DIR/clone-on-ref.rs:14:10
|
||
|
|
|
|
||
|
|
LL | fn bar<T: std::fmt::Display>(x: T) {
|
||
|
|
| - binding `x` declared here
|
||
|
|
LL | let a = &x;
|
||
|
|
| -- borrow of `x` occurs here
|
||
|
|
LL | let b = a.clone();
|
||
|
|
| ------- this call doesn't do anything, the result is still `&T` because `T` doesn't implement `Clone`
|
||
|
|
LL | drop(x);
|
||
|
|
| ^ move out of `x` occurs here
|
||
|
|
LL |
|
||
|
|
LL | println!("{b}");
|
||
|
|
| --- borrow later used here
|
||
|
|
|
|
||
|
|
help: consider further restricting this bound
|
||
|
|
|
|
||
|
|
LL | fn bar<T: std::fmt::Display + Clone>(x: T) {
|
||
|
|
| +++++++
|
||
|
|
|
||
|
|
error[E0505]: cannot move out of `x` because it is borrowed
|
||
|
|
--> $DIR/clone-on-ref.rs:23:10
|
||
|
|
|
|
||
|
|
LL | fn qux(x: A) {
|
||
|
|
| - binding `x` declared here
|
||
|
|
LL | let a = &x;
|
||
|
|
| -- borrow of `x` occurs here
|
||
|
|
LL | let b = a.clone();
|
||
|
|
| ------- this call doesn't do anything, the result is still `&A` because `A` doesn't implement `Clone`
|
||
|
|
LL | drop(x);
|
||
|
|
| ^ move out of `x` occurs here
|
||
|
|
LL |
|
||
|
|
LL | println!("{b:?}");
|
||
|
|
| ----- borrow later used here
|
||
|
|
|
|
||
|
|
help: consider annotating `A` with `#[derive(Clone)]`
|
||
|
|
|
|
||
|
|
LL + #[derive(Clone)]
|
||
|
|
LL | struct A;
|
||
|
|
|
|
||
|
|
|
||
|
|
error: aborting due to 3 previous errors
|
||
|
|
|
||
|
|
Some errors have detailed explanations: E0502, E0505.
|
||
|
|
For more information about an error, try `rustc --explain E0502`.
|