NoneMethodsExtension extension

on

• _None

Methods

and<U extends Object>(Option<U> other) → _None

andThen<U extends Object>(Option<U> f(void self)) → _None

copy() → _None

expect(String msg) → Never

filter(bool predicate(void self)) → _None

inspect(dynamic f(void self)) → _None

isNone() → bool

isSome() → bool

isSomeAnd(bool f(void self)) → bool

iter() → Iter<_None>

map<U extends Object>(U f(void self)) → _None

mapOr<U>(U defaultValue, U f(void)) → U

mapOrElse<U>(U defaultFn(), U f(void)) → U

okOr<E extends Object>(E err) → Err<Never, E>

okOrElse<E extends Object>(E errFn()) → Err<Never, E>

or<T extends Object>(Option<T> other) → Option<T>

orElse<T extends Object>(Option<T> f()) → Option<T>

toNullable<T>() → T?

unwrap() → Never

unwrapOr<T>(T defaultValue) → T

unwrapOrElse<T>(T f()) → T

xor<T extends Object>(Option<T> other) → Option<T>

zip<U extends Object>(Option<U> other) → _None

zipWith<U extends Object, R extends Object>(Option<U> other, R f(void p1, U p2)) → _None

Operators

operator [](_OptionEarlyReturnKey op) → Never