1 //===----------------------------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
12 // template <class... Types> class tuple;
14 // template <size_t I, class... Types>
15 // class tuple_element<I, tuple<Types...> >
22 #include <type_traits>
24 template <class T, std::size_t N, class U>
27 static_assert((std::is_same<typename std::tuple_element<N, T>::type, U>::value), "");
28 static_assert((std::is_same<typename std::tuple_element<N, const T>::type, const U>::value), "");
29 static_assert((std::is_same<typename std::tuple_element<N, volatile T>::type, volatile U>::value), "");
30 static_assert((std::is_same<typename std::tuple_element<N, const volatile T>::type, const volatile U>::value), "");
34 test<std::tuple<int>, 0, int>();
35 test<std::tuple<char, int>, 0, char>();
36 test<std::tuple<char, int>, 1, int>();
37 test<std::tuple<int*, char, int>, 0, int*>();
38 test<std::tuple<int*, char, int>, 1, char>();
39 test<std::tuple<int*, char, int>, 2, int>();