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

### What it does
Checks for `let _ = <expr>` where expr is `#[must_use]`

### Why is this bad?
It's better to explicitly handle the value of a `#[must_use]`
expr

### Example
```
fn f() -> Result<u32, u32> {
    Ok(0)
}

let _ = f();
// is_ok() is marked #[must_use]
let _ = f().is_ok();
```
Commit	Line	Data
f2b60f7d FG	1	### What it does
	2	Checks for `let _ = <expr>` where expr is `#[must_use]`
	3
	4	### Why is this bad?
	5	It's better to explicitly handle the value of a `#[must_use]`
	6	expr
	7
	8	### Example
	9	```
	10	fn f() -> Result<u32, u32> {
	11	Ok(0)
	12	}
	13
	14	let _ = f();
	15	// is_ok() is marked #[must_use]
	16	let _ = f().is_ok();
	17	```