manual_err

Source Code

What it does

Checks for manual implementations of err in match and if expressions.

Example

fn main() {
    let foo: Result<i32> = Result::Err('err');
    let _foo = match foo {
        Result::Ok(_) => Option::None,
        Result::Err(x) => Option::Some(x),
    };
}

Can be rewritten as:

fn main() {
    let foo: Result<i32> = Result::Err('err');
    let _foo = foo.err();
}