NotachOptional
NotachOptional is a hypothetical construct commonly discussed in programming language design discussions; it is not an established standard. It represents a value that is guaranteed to be present, serving as the opposite of an Optional or Maybe type.
NotachOptional is intended as a wrapper around a value that cannot be empty. The idea is to
NotachOptional<int> n = NotachOptional(42);
int x = n.unwrap(); // safe
If converting from a possibly-null source, a fromNullable helper would enforce non-null input, otherwise error.
NotachOptional contrasts with Optional<T>/Maybe<T>, which can represent absence. It is similar in spirit to non-nullable types
The term appears in theoretical discussions and design notes about type safety and API ergonomics. It