What it does

This lint should suggest calling Option::ok_or or Option::ok_or_else when this functionality is reimplemented using the Option::map_or or Option::map_or_else functions, respectively.

Categories (optional)

• Kind: clippy::complexity

Makes it clearer that this is converting from an Option to a Result, and produces shorter code.

Drawbacks

None.

Example

optional.map_or(
    Err(0),
    |x| Ok(x),
)

Could be written as:

optional.ok_or(0)