Cairo lint

Appearance

manual_is_none ​

Default: Enabled

Source Code

What it does ​

Checks for manual implementations of is_none.

Example ​

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

Can be rewritten as:

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