1 2 // Copyright (C) 2009-2012 Lorenzo Caminiti 3 // Distributed under the Boost Software License, Version 1.0 4 // (see accompanying file LICENSE_1_0.txt or a copy at 5 // http://www.boost.org/LICENSE_1_0.txt) 6 // Home at http://www.boost.org/libs/local_function 7 8 #ifndef BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_REMOVE_HPP_ 9 #define BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_REMOVE_HPP_ 10 11 #include <boost/preprocessor/control/iif.hpp> 12 #include <boost/preprocessor/tuple/eat.hpp> 13 #include <boost/preprocessor/config/config.hpp> 14 #include <boost/preprocessor/cat.hpp> 15 16 // PRIVATE // 17 18 // From PP_EXPAND (my own reentrant version). 19 #if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC() && \ 20 ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_DMC() 21 # define BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_REMOVE_EXPAND_(x) \ 22 BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_REMOVE_EXPAND_I_(x) 23 #else 24 # define BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_REMOVE_EXPAND_(x) \ 25 BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_REMOVE_EXPAND_OO_((x)) 26 # define BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_REMOVE_EXPAND_OO_( \ 27 par) \ 28 BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_REMOVE_EXPAND_I_ ## par 29 #endif 30 #define BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_REMOVE_EXPAND_I_(x) x 31 32 // PUBLIC // 33 34 // `is_front_macro(tokens)` is 1 if `tokens` start with keyword to remove. 35 // `removing_prefix ## <keyword-to-remove>` must expand to nothing, else 0. 36 #define BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_REMOVE_FRONT( \ 37 tokens, is_front_macro, removing_prefix) \ 38 /* without EXPAND doesn't expand on MSVC */ \ 39 BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_REMOVE_EXPAND_( \ 40 BOOST_PP_IIF(is_front_macro(tokens), \ 41 BOOST_PP_CAT \ 42 , \ 43 tokens BOOST_PP_TUPLE_EAT(2) \ 44 )(removing_prefix, tokens) \ 45 ) 46 47 // `is_back_macro(tokens)` is 1 iff `tokens` end with keyword to remove. 48 // `<keyword-to-remove> ## removing_postfix` must expand to nothing, else 0. 49 #define BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_REMOVE_BACK( \ 50 tokens, is_back_macro, removing_prefix) \ 51 BOOST_PP_IIF(is_back_macro(tokens), \ 52 BOOST_PP_CAT \ 53 , \ 54 tokens BOOST_PP_TUPLE_EAT(2) \ 55 )(tokens, removing_postfix) 56 57 #endif // #include guard 58 59