ceph/src/boost/boost/parameter/aux_/preprocessor/is_nullary.hpp

   1 // Copyright Daniel Wallin 2006.
   2 // Distributed under the Boost Software License, Version 1.0.
   3 // (See accompanying file LICENSE_1_0.txt or copy at
   4 // http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #ifndef BOOST_PARAMETER_AUX_PREPROCESSOR_IS_NULLARY_HPP
   7 #define BOOST_PARAMETER_AUX_PREPROCESSOR_IS_NULLARY_HPP
   8
   9 #include <boost/config.hpp>
  10 #include <boost/config/workaround.hpp>
  11
  12 #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
  13 // From Paul Mensonides
  14 #include <boost/preprocessor/punctuation/comma.hpp>
  15 #include <boost/preprocessor/detail/split.hpp>
  16 #define BOOST_PARAMETER_IS_NULLARY(x) \
  17     BOOST_PP_SPLIT(1, BOOST_PARAMETER_IS_NULLARY_C x BOOST_PP_COMMA() 0)
  18 /**/
  19 #include <boost/preprocessor/punctuation/paren.hpp>
  20 #include <boost/preprocessor/tuple/eat.hpp>
  21 #define BOOST_PARAMETER_IS_NULLARY_C() \
  22     ~, 1 BOOST_PP_RPAREN() \
  23     BOOST_PP_TUPLE_EAT(2) BOOST_PP_LPAREN() ~
  24 /**/
  25 #else
  26 #include <boost/preprocessor/detail/is_nullary.hpp>
  27 #define BOOST_PARAMETER_IS_NULLARY(x) BOOST_PP_IS_NULLARY(x)
  28 /**/
  29 #endif
  30
  31 #endif  // include guard
  32