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 
main()21 int 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