[rustc.git] / src / tools / clippy / src / docs / wildcard_enum_match_arm.txt

### What it does
Checks for wildcard enum matches using `_`.

### Why is this bad?
New enum variants added by library updates can be missed.

### Known problems
Suggested replacements may be incorrect if guards exhaustively cover some
variants, and also may not use correct path to enum if it's not present in the current scope.

### Example
```
match x {
    Foo::A(_) => {},
    _ => {},
}
```

Use instead:
```
match x {
    Foo::A(_) => {},
    Foo::B(_) => {},
}
```
Commit	Line	Data
f2b60f7d FG	1	### What it does
	2	Checks for wildcard enum matches using `_`.
	3
	4	### Why is this bad?
	5	New enum variants added by library updates can be missed.
	6
	7	### Known problems
	8	Suggested replacements may be incorrect if guards exhaustively cover some
	9	variants, and also may not use correct path to enum if it's not present in the current scope.
	10
	11	### Example
	12	```
	13	match x {
	14	Foo::A(_) => {},
	15	_ => {},
	16	}
	17	```
	18
	19	Use instead:
	20	```
	21	match x {
	22	Foo::A(_) => {},
	23	Foo::B(_) => {},
	24	}
	25	```