Suggest the use of bool::then_some

[leonardo-m]

What it does

Replace a if-then with the use of bool::then_some.

Advantage

Sometimes it could simplify the code.

Drawbacks

It uses less common methods instead of basic language constructs, so it makes the code a little less simple.

Example

pub fn foo(b: bool, x: u32) -> Option<u32> {
    if b {
        Some(x)
    } else {
        None
    }
}

Could be written as:

pub fn bar(b: bool, x: u32) -> Option<u32> {
    b.then_some(x)
}

[y21]

This lint exists: https://rust-lang.github.io/rust-clippy/master/index.html#if_then_some_else_none, though it's a restriction lint and you need to enable it.

[leonardo-m]

Oh, sorry for the noise.