1 # /* Copyright (C) 2001 2 # * Housemarque Oy 3 # * http://www.housemarque.com 4 # * 5 # * Distributed under the Boost Software License, Version 1.0. (See 6 # * accompanying file LICENSE_1_0.txt or copy at 7 # * http://www.boost.org/LICENSE_1_0.txt) 8 # */ 9 # 10 # /* Revised by Paul Mensonides (2002) */ 11 # 12 # /* See http://www.boost.org for most recent version. */ 13 # 14 # ifndef BOOST_PREPROCESSOR_CONTROL_EXPR_IF_HPP 15 # define BOOST_PREPROCESSOR_CONTROL_EXPR_IF_HPP 16 # 17 # include <boost/preprocessor/config/config.hpp> 18 # include <boost/preprocessor/control/expr_iif.hpp> 19 # include <boost/preprocessor/logical/bool.hpp> 20 # 21 # /* BOOST_PP_EXPR_IF */ 22 # 23 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG() 24 # define BOOST_PP_EXPR_IF(cond, expr) BOOST_PP_EXPR_IIF(BOOST_PP_BOOL(cond), expr) 25 # else 26 # define BOOST_PP_EXPR_IF(cond, expr) BOOST_PP_EXPR_IF_I(cond, expr) 27 # define BOOST_PP_EXPR_IF_I(cond, expr) BOOST_PP_EXPR_IIF(BOOST_PP_BOOL(cond), expr) 28 # endif 29 # 30 # endif 31