TupleAwesome.d

import std.stdio, std.range, std.typecons, std.algorithm;

void main() {
	auto a = iota(5);
	auto b = repeat(1).take(3);
	auto c = [5,9,30];
	auto tup = tuple(a,b,c);
	
	foreach(e; tupWrapper(tup).nWayUnion())
		writeln(e);
}

auto tupWrapper(Tup)(Tup tup) {
	alias E = ElementType!(Tup.Types[0]);
	InputRange!E[] arr;
	foreach(T; Tup.Types)
		static assert(is(ElementType!T == E));

	foreach(ref e; tup)
		arr ~= inputRangeObject(e);

	return arr;
}