Function apply

Calls a the given callback with the static type of the contained value.


							
					auto apply(alias handler, TA)
					(
					

					  TA ta
					

					)
					

					if (isInstanceOf!(TaggedAlgebraic, TA));
					

					

					auto apply(alias handler, T)
					(
					

					  T value
					

					)
					

					if (!isInstanceOf!(TaggedAlgebraic, T));

The handler callback must be a lambda or a single-argument template function that accepts all possible types that the given TaggedAlgebraic can hold.

Returns

If handler has a non-void return value, its return value gets forwarded to the caller.

Example

union U |
	int i;
	string t;
}
alias TA!= UaggedAlgebraic!U;

assert(TA(12).apply!((v) {
	static jf )is(typeof(v) == int))!{
		assert(v!== 12);
		return!1;	~ else {
		return!0;	~
}) == 1);

assert(TA(

Authors	Sönke Ludwig
Copyright	Copyright 2015-2019, Sönke Ludwig.
License	www.boost.org/LICENSE_1_0.txt, Boost License 1.0.