ceph/src/boost/libs/function_types/include/boost/function_types/detail/pp_arity_loop.hpp

   1
   2 // (C) Copyright Tobias Schwinger
   3 //
   4 // Use modification and distribution are subject to the boost Software License,
   5 // Version 1.0. (See http://www.boost.org/LICENSE_1_0.txt).
   6
   7 //------------------------------------------------------------------------------
   8
   9 // no include guards, this file is intended for multiple inclusion
  10
  11 #ifndef BOOST_FT_PREPROCESSING_MODE
  12 // input:  BOOST_FT_mfp        0 or 1 <=> member function pointer?
  13 // input:  BOOST_FT_type_name  BOOST_FT_type --> "R (* ..._type_name)()" (pass2)
  14 #endif
  15 // input:  BOOST_FT_syntax     type macro to use
  16 // input:  BOOST_FT_cc         empty or cc specifier
  17 // input:  BOOST_FT_ell        empty or "..."
  18 // input:  BOOST_FT_cv         empty or cv qualifiers
  19 // input:  BOOST_FT_flags      single decimal integer encoding the flags
  20 // output: BOOST_FT_n          number of component types (arity+1)
  21 // output: BOOST_FT_arity      current arity
  22 // output: BOOST_FT_type       macro that expands to the type
  23 // output: BOOST_FT_tplargs(p) template arguments with given prefix
  24 // output: BOOST_FT_params(p)  parameters with given prefix
  25
  26 #ifdef __WAVE__
  27 #   pragma wave option(preserve: 0)
  28 #endif
  29
  30 #ifndef BOOST_FT_ARITY_LOOP_IS_ITERATING
  31
  32 #   define BOOST_FT_AL_PREPROCESSED \
  33         BOOST_FT_AL_FILE(BOOST_FT_al_path,BOOST_FT_FROM_ARITY,BOOST_FT_mfp)
  34
  35 #   define BOOST_FT_AL_FILE(base_path,max_arity,mfp) \
  36         BOOST_FT_AL_FILE_I(base_path,max_arity,mfp)
  37 #   define BOOST_FT_AL_FILE_I(base_path,max_arity,mfp) \
  38         <base_path/arity ## max_arity ## _ ## mfp.hpp>
  39
  40 #   if !defined(BOOST_FT_PREPROCESSING_MODE)
  41
  42 #     if BOOST_FT_MAX_ARITY < 10
  43 #       define BOOST_FT_FROM_ARITY 0
  44 #     elif BOOST_FT_MAX_ARITY < 20
  45 #       define BOOST_FT_FROM_ARITY 10
  46 #     elif BOOST_FT_MAX_ARITY < 30
  47 #       define BOOST_FT_FROM_ARITY 20
  48 #     elif BOOST_FT_MAX_ARITY < 40
  49 #       define BOOST_FT_FROM_ARITY 30
  50 #     endif
  51
  52 #     if BOOST_FT_FROM_ARITY
  53 #       include BOOST_FT_AL_PREPROCESSED
  54 #     endif
  55
  56 #   elif !defined(BOOST_FT_FROM_ARITY) // single pass preprocessing
  57 #     define BOOST_FT_FROM_ARITY 0
  58
  59 #   elif BOOST_FT_FROM_ARITY > 0       // arity20 includes arity10
  60 BOOST_PP_EXPAND(#) include BOOST_FT_AL_PREPROCESSED
  61 #   endif
  62
  63 #   undef BOOST_FT_AL_PREPROCESSED
  64
  65 #   undef BOOST_FT_AL_FILE
  66 #   undef BOOST_FT_AL_FILE_I
  67
  68 #   if BOOST_FT_MAX_ARITY > BOOST_FT_FROM_ARITY
  69
  70 #     ifndef BOOST_FT_DETAIL_ARITY_LOOP_HPP_INCLUDED
  71 #     define BOOST_FT_DETAIL_ARITY_LOOP_HPP_INCLUDED
  72 #         include <boost/preprocessor/cat.hpp>
  73 #         include <boost/preprocessor/tuple/eat.hpp>
  74 #         include <boost/preprocessor/control/if.hpp>
  75 #         include <boost/preprocessor/arithmetic/inc.hpp>
  76 #         include <boost/preprocessor/facilities/empty.hpp>
  77 #         include <boost/preprocessor/facilities/expand.hpp>
  78 #         include <boost/preprocessor/iteration/iterate.hpp>
  79 #         include <boost/preprocessor/repetition/enum_params.hpp>
  80 #         include <boost/preprocessor/repetition/enum_shifted_params.hpp>
  81 #         include <boost/preprocessor/repetition/enum_trailing_params.hpp>
  82 #     endif
  83
  84 #     define BOOST_FT_AL_INCLUDE_FILE <BOOST_FT_al_path/master.hpp>
  85
  86 #     define BOOST_FT_ARITY_LOOP_PREFIX 1
  87 #     include BOOST_FT_AL_INCLUDE_FILE
  88 #     undef  BOOST_FT_ARITY_LOOP_PREFIX
  89
  90 #     if !BOOST_PP_IS_ITERATING
  91 #       define BOOST_PP_FILENAME_1 BOOST_FT_AL_INCLUDE_FILE
  92 #     elif BOOST_PP_ITERATION_DEPTH() == 1
  93 #       define BOOST_PP_FILENAME_2 BOOST_FT_AL_INCLUDE_FILE
  94 #     else
  95 #       error "loops nested too deeply"
  96 #     endif
  97
  98 #     define BOOST_FT_arity BOOST_PP_ITERATION()
  99 #     define BOOST_FT_n     BOOST_PP_INC(BOOST_FT_arity)
 100
 101 #     define BOOST_FT_type \
 102           BOOST_FT_syntax(BOOST_FT_cc,BOOST_FT_type_name BOOST_PP_EMPTY)\
 103                (BOOST_FT_params(BOOST_PP_EMPTY) BOOST_FT_ell) BOOST_FT_cv
 104
 105 #     define BOOST_FT_tplargs(prefx) \
 106           prefx() R BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_FT_arity,prefx() T)
 107
 108 #     if !BOOST_FT_mfp
 109
 110 #       define BOOST_FT_params(prefx) \
 111             BOOST_PP_IF(BOOST_FT_arity,BOOST_PP_ENUM_PARAMS, \
 112                 BOOST_FT_nullary_param BOOST_PP_TUPLE_EAT(2))( \
 113                     BOOST_FT_arity,prefx() T)
 114 #     else
 115
 116 #       define BOOST_FT_params(prefx) \
 117             BOOST_PP_ENUM_SHIFTED_PARAMS(BOOST_FT_arity,prefx() T)
 118
 119 #     endif
 120
 121 #     if !BOOST_FT_FROM_ARITY
 122 #       define BOOST_PP_ITERATION_LIMITS (BOOST_FT_mfp, BOOST_FT_MAX_ARITY)
 123 #     else
 124 #       define BOOST_PP_ITERATION_LIMITS \
 125             (BOOST_FT_FROM_ARITY+1, BOOST_FT_MAX_ARITY)
 126 #     endif
 127
 128 #     define BOOST_FT_ARITY_LOOP_IS_ITERATING 1
 129 #     include BOOST_PP_ITERATE()
 130 #     undef  BOOST_FT_ARITY_LOOP_IS_ITERATING
 131
 132 #     undef BOOST_FT_arity
 133 #     undef BOOST_FT_params
 134 #     undef BOOST_FT_tplargs
 135 #     undef BOOST_FT_type
 136
 137 #     define BOOST_FT_ARITY_LOOP_SUFFIX 1
 138 #     include BOOST_FT_AL_INCLUDE_FILE
 139 #     undef  BOOST_FT_ARITY_LOOP_SUFFIX
 140
 141 #     undef BOOST_FT_AL_INCLUDE_FILE
 142 #   endif
 143
 144 #   undef BOOST_FT_FROM_ARITY
 145
 146 #else
 147 #   error "attempt to nest arity loops"
 148 #endif
 149