Rollup merge of #132939 - uellenberg:suggest-deref, r=oli-obk

Suggest using deref in patterns

Fixes #132784

This changes the following code:
```rs
use std::sync::Arc;
fn main() {
    let mut x = Arc::new(Some(1));
    match x {
        Some(_) => {}
        None => {}
    }
}
```

to output
```rs
error[E0308]: mismatched types
  --> src/main.rs:5:9
   |
LL |     match x {
   |           - this expression has type `Arc<Option<{integer}>>`
...
LL |         Some(_) => {}
   |         ^^^^^^^ expected `Arc<Option<{integer}>>`, found `Option<_>`
   |
   = note: expected struct `Arc<Option<{integer}>>`
                found enum `Option<_>`
help: consider dereferencing to access the inner value using the Deref trait
   |
LL |     match *x {
   |           ~~
```

instead of
```rs
error[E0308]: mismatched types
 --> src/main.rs:5:9
  |
4 |     match x {
  |           - this expression has type `Arc<Option<{integer}>>`
5 |         Some(_) => {}
  |         ^^^^^^^ expected `Arc<Option<{integer}>>`, found `Option<_>`
  |
  = note: expected struct `Arc<Option<{integer}>>`
               found enum `Option<_>`
```

This makes it more obvious that a Deref is available, and gives a suggestion on how to use it in order to fix the issue at hand.

0 files changed, 0 insertions, 0 deletions