rightTupleFunction

static string cts(char x)
{
	import std.conv : to;
	return x.to!string;
}
static string rts(real x)
{
	import std.conv : to;
	return x.to!string;
}
auto l = RealFunction!cts.get.leftTupleFunction!real;
auto r = RealFunction!rts.get.rightTupleFunction!char;
static assert (is (typeof (l) == typeof (r)));