manual_is_none

Source Code

What it does

Checks for manual implementations of is_none.

Example

fn main() {
    let foo: Option<i32> = Option::None;
    let _foo = match foo {
        Option::Some(_) => false,
        Option::None => true,
    };
}

Can be rewritten as:

fn main() {
    let foo: Option<i32> = Option::None;
    let _foo = foo.is_none();
}