Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is the documentation for a development version of boost.

boost/preprocessor/facilities/expand.hpp

# /* Copyright (C) 2001
#  * Housemarque Oy
#  * http://www.housemarque.com
#  *
#  * Distributed under the Boost Software License, Version 1.0. (See
#  * accompanying file LICENSE_1_0.txt or copy at
#  * http://www.boost.org/LICENSE_1_0.txt)
#  */
#
# /* Revised by Paul Mensonides (2002) */
#
# /* See http://www.boost.org for most recent version. */
#
# ifndef BOOST_PREPROCESSOR_FACILITIES_EXPAND_HPP
# define BOOST_PREPROCESSOR_FACILITIES_EXPAND_HPP
#
# include <boost/preprocessor/config/config.hpp>
#
# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC() && ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_DMC()
#    define BOOST_PP_EXPAND(x) BOOST_PP_EXPAND_I(x)
# else
#    define BOOST_PP_EXPAND(x) BOOST_PP_EXPAND_OO((x))
#    define BOOST_PP_EXPAND_OO(par) BOOST_PP_EXPAND_I ## par
# endif
#
# define BOOST_PP_EXPAND_I(x) x
#
# endif