Optional

Pseudo immutable optional with a value or not.

Optional!T optional(T optional)
Optional!T optional(T optional)
Optional!T optional()
struct Optional(T)
@safe
struct Optional (
T
) {
immutable
bool isNull;
this(T payload);
Optional!(const T) opCast();
inout(T) payload();
inout(T) orElse(inout(T) alternative);
void orElseThrow(T exception);
bool opEquals(typeof(null) term);
bool opEquals(T value);
}

Constructors

this this(T payload): Constructor for pseudo immutable optional.

Alias This

Convenience subtyping.

Members

Functions

opCast Optional!(const T) opCast(): Return a const version of this optional.
opEquals bool opEquals(typeof(null) term): Check whether optional is null or not.
opEquals bool opEquals(T value): Undocumented in source. Be warned that the author may not have intended to support it.
orElse inout(T) orElse(inout(T) alternative): Get the payload if exists or provide an alternative.
orElseThrow void orElseThrow(T exception): Undocumented in source. Be warned that the author may not have intended to support it.
payload inout(T) payload(): Get the payload hosted in this optional.

Variables

isNull bool isNull;: Undocumented in source.

Return Value

An optional filled or not with value.

Meta

Source

See Implementation

aermicioi aedi util typecons aliases

paired

functions

interfaces

Subscribable

mixin templates

structs