Alias OptionalTarget
Returns the target type of a optional.
alias OptionalTarget(T)
= TemplateArgsOf!T[0];
Example
import optional: Optional;
class C {}
struct S {}
import std .meta: AliasSeq;
foreach (T; AliasSeq!(int, int*, S, C, int[], S[], C[])) {
alias CT = const T;
alias IT = immutable T;
alias ST = shared T;
static assert(is(OptionalTarget!(Optional!T) == T));
static assert(is(OptionalTarget!(Optional!CT) == CT));
static assert(is(OptionalTarget!(Optional!IT) == IT));
static assert(is(OptionalTarget!(Optional!ST) == ST));
}