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 <size_t I, class... Types>
15//   typename tuple_element<I, tuple<Types...> >::type const&
16//   get(const tuple<Types...>& t);
17
18// UNSUPPORTED: c++98, c++03
19
20#include <tuple>
21#include <string>
22#include <cassert>
23
24int main()
25{
26    {
27        typedef std::tuple<double&, std::string, int> T;
28        double d = 1.5;
29        const T t(d, "high", 5);
30        assert(std::get<0>(t) == 1.5);
31        assert(std::get<1>(t) == "high");
32        assert(std::get<2>(t) == 5);
33        std::get<0>(t) = 2.5;
34        assert(std::get<0>(t) == 2.5);
35        assert(std::get<1>(t) == "high");
36        assert(std::get<2>(t) == 5);
37        assert(d == 2.5);
38
39        std::get<1>(t) = "four";
40    }
41}
42