Parameter Pack Crazyness

fun.cpp

query("hello");
// executes q("hello");

query("delete where x =", x);
// executes q("delete where x = % ", x);

query("delete where x =", x, "and a = 5");
// executes q("delete where x = % and a = 5", x);

query("delete where x =", x, "and a =", y);
// executes q("delete where x = % and a = % ", x, y);


// Possible implementation to allow query(string, T, string, U, string, V, ... etc.) for any T,U,V,...
template<typename... T>
void query((std::string, T)... x, std::string y = {}) {
	std::string s = join_with(" % ", first_value(x...)..., y);
	q(s, second_value(x...)...);
}


// Update:

// Using option 3:

template<typename... T>
void query(<std::string, T>... ... x, std::string y = {}) {
	std::string s = join_with(" % ", first_value(x...)..., y);
	q(s, second_value(x...)...);
}