| //===----------------------------------------------------------------------===// |
| // |
| // 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. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++98, c++03, c++11, c++14 |
| |
| // <tuple> |
| |
| // template <class T> constexpr size_t tuple_size_v = tuple_size<T>::value; |
| |
| #include <tuple> |
| #include <utility> |
| #include <array> |
| |
| template <class Tuple, int Expect> |
| void test() |
| { |
| static_assert(std::tuple_size_v<Tuple> == Expect, ""); |
| static_assert(std::tuple_size_v<Tuple> == std::tuple_size<Tuple>::value, ""); |
| static_assert(std::tuple_size_v<Tuple const> == std::tuple_size<Tuple>::value, ""); |
| static_assert(std::tuple_size_v<Tuple volatile> == std::tuple_size<Tuple>::value, ""); |
| static_assert(std::tuple_size_v<Tuple const volatile> == std::tuple_size<Tuple>::value, ""); |
| } |
| |
| int main() |
| { |
| test<std::tuple<>, 0>(); |
| |
| test<std::tuple<int>, 1>(); |
| test<std::array<int, 1>, 1>(); |
| |
| test<std::tuple<int, int>, 2>(); |
| test<std::pair<int, int>, 2>(); |
| test<std::array<int, 2>, 2>(); |
| |
| test<std::tuple<int, int, int>, 3>(); |
| test<std::array<int, 3>, 3>(); |
| } |