Option.from(value | null | undefined)

[Cre3per]

Hi!

I'm currently adding Option to a project of mine and am surprised there is no Option.from(value | null | undefined).
A concrete use case would be

const array = [ 1, 2, 3 ];
const found = Option.from(array.find(4));

I'm aware of Option.from(() => array.find(4)), but that seems a little verbose for such simple conversions.

---

This feature is API-incompatible with the current from(), consider

function thirdParty(): undefined | () => number;

function getFn(): Option<() => number> {
  return Option.from(thirdParty()); // from() can't know if it is supposed to call the function or not
}

[aaronhuggins]

Based on the implementation in Rust, I think your request is actually a bug. Current behavior appears to deviate from Rust based on From<T>.