final/test/utilities/tuple/tuple.tuple/tuple.creation/make_tuple.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <tuple>

// template <class... Types> class tuple;

// template<class... Types>
//   tuple<VTypes...> make_tuple(Types&&... t);

#include <tuple>
#include <functional>
#include <cassert>

int main()
{
    {
        int i = 0;
        float j = 0;
        std::tuple<int, int&, float&> t = std::make_tuple(1, std::ref(i),
                                                          std::ref(j));
        assert(std::get<0>(t) == 1);
        assert(std::get<1>(t) == 0);
        assert(std::get<2>(t) == 0);
        i = 2;
        j = 3.5;
        assert(std::get<0>(t) == 1);
        assert(std::get<1>(t) == 2);
        assert(std::get<2>(t) == 3.5);
        std::get<1>(t) = 0;
        std::get<2>(t) = 0;
        assert(i == 0);
        assert(j == 0);
    }
}