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- //===----------------------------------------------------------------------===//
- //
- // The LLVM Compiler Infrastructure
- //
- // This file is dual licensed under the MIT and the University of Illinois Open
- // Source Licenses. See LICENSE.TXT for details.
- //
- //===----------------------------------------------------------------------===//
- // <tuple>
- // template <class... Types> class tuple;
- // template <class... Types>
- // class tuple_size<tuple<Types...>>
- // : public integral_constant<size_t, sizeof...(Types)> { };
- // UNSUPPORTED: c++98, c++03
- #include <tuple>
- #include <type_traits>
- template <class T, std::size_t N>
- void test()
- {
- static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
- std::tuple_size<T> >::value), "");
- static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
- std::tuple_size<const T> >::value), "");
- static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
- std::tuple_size<volatile T> >::value), "");
- static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
- std::tuple_size<const volatile T> >::value), "");
- }
- int main()
- {
- test<std::tuple<>, 0>();
- test<std::tuple<int>, 1>();
- test<std::tuple<char, int>, 2>();
- test<std::tuple<char, char*, int>, 3>();
- }
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