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