import std.stdio, std.typecons;

struct Container(ID, Properties...)
{
	Tup!(ID, Properties)[] contents;

	void add(ID i, Properties p)
	{
		static if(Properties.length == 0)
			contents ~= Tup!(ID)(i);
		else
			contents ~= Tup!(ID, Properties)(i, p);
	}
}


template Tup(ID, Properties...)
{
	static if(Properties.length == 0)
		alias Tuple!(ID, "id") Tup;
	else
		alias Tuple!(ID, "id", Properties) Tup;
}

void main()
{
	writeln();
	auto c1 = Container!(size_t)();
	c1.add(3);
	c1.add(7);
	c1.add(2);
	writeln(c1);

	foreach(t, tup; c1.contents)
		writeln("[", t, "] ", tup.id);
	writeln();

	auto c2 = Container!(size_t, real, real)();
	c2.add(5, 3.2, 5.6);
	writeln(c2);
	writeln();

	auto t1 = Tup!(size_t, real, "value")(3, 4.5);
	writeln(t1);
	writeln(t1.id, " ", t1.value);

	auto t2 = Tup!(size_t, real, "value", bool, "active")(3, 4.5, true);
	writeln(t2);
	writeln(t2.id, " ", t2.value, " ", t2.active);

	auto c3 = Container!(size_t, real, "value")();  // this falls over
}