ceph/src/boost/boost/contract/detail/preprocessor/keyword/utility/is.hpp

   1
   2 #ifndef BOOST_CONTRACT_DETAIL_PP_KEYWORD_UTILITY_IS_HPP_
   3 #define BOOST_CONTRACT_DETAIL_PP_KEYWORD_UTILITY_IS_HPP_
   4
   5 // Copyright (C) 2008-2018 Lorenzo Caminiti
   6 // Distributed under the Boost Software License, Version 1.0 (see accompanying
   7 // file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
   8 // See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
   9
  10 #include <boost/preprocessor/cat.hpp>
  11 #include <boost/preprocessor/variadic/size.hpp>
  12
  13 /* PRIVATE */
  14
  15 #define BOOST_CONTRACT_DETAIL_PP_KEYWORD_UTILITY_IS_1 0
  16 #define BOOST_CONTRACT_DETAIL_PP_KEYWORD_UTILITY_IS_2 1
  17
  18 /* PUBLIC */
  19
  20 // Precondition: A macro named `cat_to_comma_prefix ## token-to-check` must be
  21 //               #defined to expand to `,`.
  22 // Precondition: tokens must start with a token concatenable to a macro name
  23 //               (e.g., a literal or integral token).
  24 #define BOOST_CONTRACT_DETAIL_PP_KEYWORD_UTILITY_IS( \
  25         cat_to_comma_prefix, tokens) \
  26     BOOST_PP_CAT(BOOST_CONTRACT_DETAIL_PP_KEYWORD_UTILITY_IS_, \
  27             BOOST_PP_VARIADIC_SIZE(BOOST_PP_CAT(cat_to_comma_prefix, tokens)))
  28
  29 #endif // #include guard
  30