1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <tuple>
11
12// template <class... Types> class tuple;
13
14// template<class... Types>
15//   tuple<Types&...> tie(Types&... t);
16
17#include <tuple>
18#include <string>
19#include <cassert>
20
21int main()
22{
23    {
24        int i = 0;
25        std::string s;
26        std::tie(i, std::ignore, s) = std::make_tuple(42, 3.14, "C++");
27        assert(i == 42);
28        assert(s == "C++");
29    }
30#if _LIBCPP_STD_VER > 11
31    {
32        static constexpr int i = 42;
33        static constexpr double f = 1.1;
34        constexpr std::tuple<const int &, const double &> t = std::tie(i, f);
35        static_assert ( std::get<0>(t) == 42, "" );
36        static_assert ( std::get<1>(t) == 1.1, "" );
37    }
38#endif
39}
40