| 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: if `T` implemented `Clone`, you could clone the value |
| --> $DIR/clone-on-ref.rs:11:8 |
| | |
| LL | fn bar<T: std::fmt::Display>(x: T) { |
| | ^ consider constraining this type parameter with `Clone` |
| LL | let a = &x; |
| | - you could clone this value |
| 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 |
| | |
| note: if `A` implemented `Clone`, you could clone the value |
| --> $DIR/clone-on-ref.rs:19:1 |
| | |
| LL | struct A; |
| | ^^^^^^^^ consider implementing `Clone` for this type |
| LL | fn qux(x: A) { |
| LL | let a = &x; |
| | - you could clone this value |
| 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`. |