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

   1 // Copyright David Abrahams, Daniel Wallin 2003.
   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 // This file generates overloads in this format:
   7 //
   8 //     template <typename A0, typename A1>
   9 //     typename ::boost::mpl::apply_wrap1<
  10 //         ::boost::parameter::aux::make_arg_list<
  11 //             PS0,A0
  12 //           , ::boost::parameter::aux::make_arg_list<
  13 //                 PS1,A1
  14 //               , ::boost::mpl::identity<
  15 //                     ::boost::parameter::aux::empty_arg_list
  16 //                 >
  17 //             >
  18 //         >
  19 //      , unnamed_list
  20 //     >::type
  21 //         operator()(A0 const& a0, A1 const& a1) const
  22 //     {
  23 //         typedef typename ::boost::mpl::apply_wrap1<
  24 //             ::boost::parameter::aux::make_arg_list<
  25 //                 PS0,A0
  26 //               , ::boost::parameter::aux::make_arg_list<
  27 //                     PS1,A1
  28 //                   , ::boost::mpl::identity<
  29 //                         ::boost::parameter::aux::empty_arg_list
  30 //                     >
  31 //                 >
  32 //             >
  33 //         >::type arg_tuple;
  34 //
  35 //         return arg_tuple(
  36 //             a0
  37 //           , a1
  38 //           , ::boost::parameter::aux::void_()
  39 //             ...
  40 //         );
  41 //     }
  42 //
  43
  44 #if !defined(BOOST_PP_IS_ITERATING)
  45 # error Boost.Parameters - do not include this file!
  46 #endif
  47
  48 #define N BOOST_PP_ITERATION()
  49
  50 #define BOOST_PARAMETER_open_list(z, n, text) \
  51     ::boost::parameter::aux::item< \
  52         BOOST_PP_CAT(PS, n), BOOST_PP_CAT(A, n)
  53
  54 #define BOOST_PARAMETER_close_list(z, n, text) >
  55
  56 #define BOOST_PARAMETER_arg_list(n) \
  57     ::boost::parameter::aux::make_arg_list< \
  58         BOOST_PP_ENUM(N, BOOST_PARAMETER_open_list, _) \
  59       , ::boost::parameter::void_ \
  60         BOOST_PP_REPEAT(N, BOOST_PARAMETER_close_list, _) \
  61       , deduced_list \
  62       , ::boost::parameter::aux::tag_keyword_arg \
  63     >
  64
  65 #define BOOST_PARAMETER_arg_pack_init(z, n, limit) \
  66     BOOST_PP_CAT(a, BOOST_PP_SUB(limit, n))
  67
  68 template <BOOST_PP_ENUM_PARAMS(N, typename A)>
  69 typename ::boost::mpl::first<
  70     typename BOOST_PARAMETER_arg_list(N)::type
  71 >::type
  72     operator()(BOOST_PP_ENUM_BINARY_PARAMS(N, A, & a)) const
  73 {
  74     typedef typename BOOST_PARAMETER_arg_list(N)::type result;
  75     typedef typename ::boost::mpl::first<result>::type result_type;
  76     typedef typename ::boost::mpl::second<result>::type error;
  77     error();
  78
  79     return result_type(
  80         BOOST_PP_ENUM(N, BOOST_PARAMETER_arg_pack_init, BOOST_PP_DEC(N))
  81         BOOST_PP_ENUM_TRAILING_PARAMS(
  82             BOOST_PP_SUB(BOOST_PARAMETER_COMPOSE_MAX_ARITY, N)
  83           , ::boost::parameter::aux::void_reference() BOOST_PP_INTERCEPT
  84         )
  85     );
  86 }
  87
  88 #undef BOOST_PARAMETER_arg_list
  89 #undef BOOST_PARAMETER_close_list
  90 #undef BOOST_PARAMETER_open_list
  91 #undef N
  92