U++

template <class A, class B>
struct Tie2 {
A& a;
B& b;

void operator=(const Tuple2<A, B>& s) { a = s.a; b = s.b; }

Tie2(A& a, B& b) : a(a), b(b) {}
};

template <class A, class B>
Tie2<A, B> Tie(A& a, B& b) { return Tie2<A, B>(a, b); }

CONSOLE_APP_MAIN {
// std::initializer_list<Tuple2<int, int>> l = { {1, 2}, {3, 4} };
// for(auto x: l)
// DDUMP;

Tuple2<int, int> x = MakeTuple(1, 2);
    int a, b;
    Tie(a, b) = x;