ceph/src/boost/boost/vmd/detail/is_empty.hpp

   1
   2 //  (C) Copyright Edward Diener 2011-2015
   3 //  Use, modification and distribution are subject to the Boost Software License,
   4 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   5 //  http://www.boost.org/LICENSE_1_0.txt).
   6
   7 #if !defined(BOOST_VMD_DETAIL_IS_EMPTY_HPP)
   8 #define BOOST_VMD_DETAIL_IS_EMPTY_HPP
   9
  10 #include <boost/preprocessor/punctuation/is_begin_parens.hpp>
  11
  12 #if BOOST_VMD_MSVC
  13
  14 # pragma warning(once:4002)
  15
  16 #define BOOST_VMD_DETAIL_IS_EMPTY_IIF_0(t, b) b
  17 #define BOOST_VMD_DETAIL_IS_EMPTY_IIF_1(t, b) t
  18
  19 #if BOOST_VMD_MSVC_V8
  20
  21 #define BOOST_VMD_DETAIL_IS_EMPTY_PROCESS(param) \
  22     BOOST_PP_IS_BEGIN_PARENS \
  23         ( \
  24         BOOST_VMD_DETAIL_IS_EMPTY_NON_FUNCTION_C param () \
  25         ) \
  26 /**/
  27
  28 #else
  29
  30 #define BOOST_VMD_DETAIL_IS_EMPTY_PROCESS(...) \
  31     BOOST_PP_IS_BEGIN_PARENS \
  32         ( \
  33         BOOST_VMD_DETAIL_IS_EMPTY_NON_FUNCTION_C __VA_ARGS__ () \
  34         ) \
  35 /**/
  36
  37 #endif
  38
  39 #else
  40
  41 #define BOOST_VMD_DETAIL_IS_EMPTY_IIF_0(t, ...) __VA_ARGS__
  42 #define BOOST_VMD_DETAIL_IS_EMPTY_IIF_1(t, ...) t
  43
  44 #define BOOST_VMD_DETAIL_IS_EMPTY_PROCESS(...) \
  45     BOOST_PP_IS_BEGIN_PARENS \
  46         ( \
  47         BOOST_VMD_DETAIL_IS_EMPTY_NON_FUNCTION_C __VA_ARGS__ () \
  48         ) \
  49 /**/
  50
  51 #endif /* BOOST_VMD_MSVC */
  52
  53 #define BOOST_VMD_DETAIL_IS_EMPTY_PRIMITIVE_CAT(a, b) a ## b
  54 #define BOOST_VMD_DETAIL_IS_EMPTY_IIF(bit) \
  55     BOOST_VMD_DETAIL_IS_EMPTY_PRIMITIVE_CAT(BOOST_VMD_DETAIL_IS_EMPTY_IIF_,bit) \
  56 /**/
  57
  58 #define BOOST_VMD_DETAIL_IS_EMPTY_NON_FUNCTION_C(...) ()
  59 #define BOOST_VMD_DETAIL_IS_EMPTY_GEN_ZERO(...) 0
  60
  61 #endif /* BOOST_VMD_DETAIL_IS_EMPTY_HPP */