1// Copyright Cromwell D. Enage 2019.
2// Distributed under the Boost Software License, Version 1.0.
3// (See accompanying file LICENSE_1_0.txt or copy at
4// http://www.boost.org/LICENSE_1_0.txt)
5
6#ifndef BOOST_PARAMETER_AUX_PREPROCESSOR_NULLPTR_HPP
7#define BOOST_PARAMETER_AUX_PREPROCESSOR_NULLPTR_HPP
8
9#include <boost/config.hpp>
10
11#if defined(BOOST_NO_CXX11_NULLPTR)
12#define BOOST_PARAMETER_AUX_PP_NULLPTR 0
13#else
14#define BOOST_PARAMETER_AUX_PP_NULLPTR nullptr
15#endif
16
17#endif // include guard
18
19

source code of boost/libs/parameter/include/boost/parameter/aux_/preprocessor/nullptr.hpp