option

Use option to model a value that may be present (some) or absent (none) without relying on null.

import "std:option"

Example

import "std:option"

auto value = some(42)
log value.unwrapOr(0)

API reference

Option values

Method	Returns	Notes
value.isSome()	boolean
value.isNone()	boolean
value.unwrap()	T	Returns the stored value, or fails for none.
value.unwrapOr(def: T)	T	Returns the contained value or a fallback.
value.expect(msg: any)	T	Uses the same checked accessor with a custom failure message.

Notes

• Prefer import "std:option"; the older import "osl/option" spelling remains supported.

Behavior and limits

some(null) remains a present option; presence is not inferred from whether the stored value is null.