ceph/src/boost/boost/local_function/detail/preprocessor/keyword/facility/add.hpp

   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_ADD_HPP_
   9 #define BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_ADD_HPP_
  10
  11 #include <boost/preprocessor/control/expr_iif.hpp>
  12 #include <boost/preprocessor/logical/compl.hpp>
  13
  14 // `is_front_macro(tokens)` is 1 if `tokens` start w/ `keyword` to add, else 0.
  15 #define BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_ADD_FRONT( \
  16         tokens, is_front_macro, keyword) \
  17     BOOST_PP_EXPR_IIF(BOOST_PP_COMPL(is_front_macro(tokens)), keyword) tokens
  18
  19 // `is_back_macro(tokens)` is 1 if `tokens` end with `keyword` to add, else 0.
  20 #define BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_ADD_BACK( \
  21         tokens, is_back_macro, keyword) \
  22     tokens BOOST_PP_EXPR_IIF(BOOST_PP_COMPL(is_back_macro(tokens)), keyword)
  23
  24 #endif // #include guard
  25