tuple_element.pass.cpp revision b64f8b07c104c6cc986570ac8ee0ed16a9f23976 
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// class tuple_element<I, tuple<Types...> >
16// {
17// public:
18//     typedef Ti type;
19// };
20
21#include <tuple>
22#include <type_traits>
23
24int main()
25{
26    {
27        typedef std::tuple<int> T;
28        static_assert((std::is_same<std::tuple_element<0, T>::type,
29                                    int>::value), "");
30    }
31    {
32        typedef std::tuple<char, int> T;
33        static_assert((std::is_same<std::tuple_element<0, T>::type,
34                                    char>::value), "");
35        static_assert((std::is_same<std::tuple_element<1, T>::type,
36                                    int>::value), "");
37    }
38    {
39        typedef std::tuple<int*, char, int> T;
40        static_assert((std::is_same<std::tuple_element<0, T>::type,
41                                    int*>::value), "");
42        static_assert((std::is_same<std::tuple_element<1, T>::type,
43                                    char>::value), "");
44        static_assert((std::is_same<std::tuple_element<2, T>::type,
45                                    int>::value), "");
46    }
47}
48