isOptional

Checks if T is an optional type

template isOptional (

T

) {

import optional : Optional;;

import std.traits : isInstanceOf;;

enum isOptional;

}

Members

Manifest constants

isOptional enum isOptional;: Undocumented in source.

Examples

import optional: Optional;

assert(isOptional!(Optional!int) == true);
assert(isOptional!int == false);
assert(isOptional!(int[]) == false);

Meta

Source

See Implementation

optional traits templates