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Suggest replacing an inexisting field for an unmentioned field

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This PR adds a suggestion to replace an inexisting field for an
unmentioned field. Given the following code:
```rust
enum Foo {
    Bar { alpha: u8, bravo: u8, charlie: u8 },
}

fn foo(foo: Foo) {
    match foo {
        Foo::Bar {
            alpha,
            beta, // `bravo` miswritten as `beta` here.
            charlie,
        } => todo!(),
    }
}
```
the compiler now emits the error messages below.
```text
error[E0026]: variant `Foo::Bar` does not have a field named `beta`
 --> src/lib.rs:9:13
  |
9 |             beta, // `bravo` miswritten as `beta` here.
  |             ^^^^
  |             |
  |             variant `Foo::Bar` does not have this field
  |             help: `Foo::Bar` has a field named `bravo`: `bravo`
```

Note that this suggestion is available iff the number of inexisting
fields and unmentioned fields are both 1.
This commit is contained in:
Hirochika Matsumoto 2021-08-12 19:10:44 +09:00
parent c6f32f3750
commit 37196e3691
3 changed files with 22 additions and 3 deletions
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5
src/test/ui/issues/issue-51102.stderr
View file

@ -2,7 +2,10 @@ error[E0026]: struct `SimpleStruct` does not have a field named `state`
--> $DIR/issue-51102.rs:13:17
|
LL | state: 0,
| ^^^^^ struct `SimpleStruct` does not have this field
| ^^^^^
| |
| struct `SimpleStruct` does not have this field
| help: `SimpleStruct` has a field named `no_state_here`
error[E0025]: field `no_state_here` bound multiple times in the pattern
--> $DIR/issue-51102.rs:24:17

5
src/test/ui/numeric/numeric-fields.stderr
View file

@ -16,7 +16,10 @@ error[E0026]: struct `S` does not have a field named `0x1`
--> $DIR/numeric-fields.rs:7:17
|
LL | S{0: a, 0x1: b, ..} => {}
| ^^^ struct `S` does not have this field
| ^^^
| |
| struct `S` does not have this field
| help: `S` has a field named `1`
error: aborting due to 2 previous errors