rust/compiler/rustc_borrowck
Esteban Küber cc80106cb5 Provide more suggestions for cloning immutable bindings
When encountering multiple mutable borrows, suggest cloning and adding
derive annotations as needed.

```
error[E0596]: cannot borrow `sm.x` as mutable, as it is behind a `&` reference
  --> $DIR/accidentally-cloning-ref-borrow-error.rs:32:9
   |
LL |     foo(&mut sm.x);
   |         ^^^^^^^^^ `sm` is a `&` reference, so the data it refers to cannot be borrowed as mutable
   |
help: `Str` doesn't implement `Clone`, so this call clones the reference `&Str`
  --> $DIR/accidentally-cloning-ref-borrow-error.rs:31:21
   |
LL |     let mut sm = sr.clone();
   |                     ^^^^^^^
help: consider annotating `Str` with `#[derive(Clone)]`
   |
LL + #[derive(Clone)]
LL | struct Str {
   |
help: consider specifying this binding's type
   |
LL |     let mut sm: &mut Str = sr.clone();
   |               ++++++++++
```

```
error[E0596]: cannot borrow `*inner` as mutable, as it is behind a `&` reference
  --> $DIR/issue-91206.rs:14:5
   |
LL |     inner.clear();
   |     ^^^^^ `inner` is a `&` reference, so the data it refers to cannot be borrowed as mutable
   |
help: you can `clone` the `Vec<usize>` value and consume it, but this might not be your desired behavior
  --> $DIR/issue-91206.rs:11:17
   |
LL |     let inner = client.get_inner_ref();
   |                 ^^^^^^^^^^^^^^^^^^^^^^
help: consider specifying this binding's type
   |
LL |     let inner: &mut Vec<usize> = client.get_inner_ref();
   |              +++++++++++++++++
```
2023-12-04 21:54:34 +00:00
..
src Provide more suggestions for cloning immutable bindings 2023-12-04 21:54:34 +00:00
Cargo.toml Replace custom_encodable with encodable. 2023-11-22 18:37:14 +11:00
messages.ftl s/generator/coroutine/ 2023-10-20 21:14:01 +00:00