1 // 2 // detail/cstddef.hpp 3 // ~~~~~~~~~~~~~~~~~~ 4 // 5 // Copyright (c) 2003-2017 Christopher M. Kohlhoff (chris at kohlhoff dot com) 6 // 7 // Distributed under the Boost Software License, Version 1.0. (See accompanying 8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 9 // 10 11 #ifndef ASIO_DETAIL_CSTDDEF_HPP 12 #define ASIO_DETAIL_CSTDDEF_HPP 13 14 #if defined(_MSC_VER) && (_MSC_VER >= 1200) 15 # pragma once 16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) 17 18 #include "asio/detail/config.hpp" 19 #include <cstddef> 20 21 namespace asio { 22 23 #if defined(ASIO_HAS_NULLPTR) 24 using std::nullptr_t; 25 #else // defined(ASIO_HAS_NULLPTR) 26 struct nullptr_t {}; 27 #endif // defined(ASIO_HAS_NULLPTR) 28 29 } // namespace asio 30 31 #endif // ASIO_DETAIL_CSTDDEF_HPP 32