isSumType

True if T is a SumType or implicitly converts to one, otherwise false.

template isSumType (

) {

static if(is(T : SumType!Args, Args...))

enum isSumType;

static if(!(is(T : SumType!Args, Args...)))

static if(is(T == struct) && __traits(getAliasThis, T).length > 0)

enum isSumType;

static if(!(is(T : SumType!Args, Args...)))

static if(!(is(T == struct) && __traits(getAliasThis, T).length > 0))

enum isSumType;

}

Examples

static struct ConvertsToSumType
{
	SumType!int payload;
	alias payload this;
}

static struct ContainsSumType
{
	SumType!int payload;
}

assert(isSumType!(SumType!int));
assert(isSumType!ConvertsToSumType);
assert(!isSumType!ContainsSumType);

isSumType

Examples

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