1#ifndef BOOST_SMART_PTR_DETAIL_SP_NULLPTR_T_HPP_INCLUDED
2#define BOOST_SMART_PTR_DETAIL_SP_NULLPTR_T_HPP_INCLUDED
3
4// MS compatible compilers support #pragma once
5
6#if defined(_MSC_VER) && (_MSC_VER >= 1020)
7# pragma once
8#endif
9
10// detail/sp_nullptr_t.hpp
11//
12// Copyright 2013 Peter Dimov
13//
14// Distributed under the Boost Software License, Version 1.0.
15// See accompanying file LICENSE_1_0.txt or copy at
16// http://www.boost.org/LICENSE_1_0.txt
17
18#include <boost/config.hpp>
19#include <cstddef>
20
21#if !defined( BOOST_NO_CXX11_NULLPTR )
22
23namespace boost
24{
25
26namespace detail
27{
28
29#if !defined( BOOST_NO_CXX11_DECLTYPE ) && ( ( defined( __clang__ ) && !defined( _LIBCPP_VERSION ) ) || defined( __INTEL_COMPILER ) )
30
31 typedef decltype(nullptr) sp_nullptr_t;
32
33#else
34
35 typedef std::nullptr_t sp_nullptr_t;
36
37#endif
38
39} // namespace detail
40
41} // namespace boost
42
43#endif // !defined( BOOST_NO_CXX11_NULLPTR )
44
45#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_NULLPTR_T_HPP_INCLUDED
46