Option

Option[T]

Optional value: either something or nothing

Variants:

None,
Some: T,

Methods:

pub fn is_some(*const self) bool;

pub fn is_none(*const self) bool;

pub fn unwrap(self) T;

pub fn unwrap_or(self, default: T) T;

pub fn unwrap_or_else(self, f: FnOnce() T) T;

pub fn expect(self, msg: []const char) T;

pub fn map[U](self, f: FnOnce(T) U) Option[U];

pub fn map_or[U](self, f: FnOnce(T) U, default: U) Option[U];

pub fn inspect(self, f: FnOnce(*T) void) Option[T];

pub fn ok_or[E](self, err: E) Result[T, E];

pub fn ok_or_else[E](self, err: FnOnce() E) Result[T, E];

pub fn and_then[U](self, f: FnOnce(T) Option[U]) Option[U];

pub fn filter(self, predicate: FnOnce(*T) bool) Option[T];

Interfaces:

Enums