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 // UNSUPPORTED: c++98, c++03
18 
19 #include <tuple>
20 #include <string>
21 #include <cassert>
22 
main()23 int main()
24 {
25     {
26         int i = 0;
27         std::string s;
28         std::tie(i, std::ignore, s) = std::make_tuple(42, 3.14, "C++");
29         assert(i == 42);
30         assert(s == "C++");
31     }
32 #if _LIBCPP_STD_VER > 11
33     {
34         static constexpr int i = 42;
35         static constexpr double f = 1.1;
36         constexpr std::tuple<const int &, const double &> t = std::tie(i, f);
37         static_assert ( std::get<0>(t) == 42, "" );
38         static_assert ( std::get<1>(t) == 1.1, "" );
39     }
40 #endif
41 }
42