luabind/detail/calc_arity.hpp

   1 // Copyright (c) 2003 Daniel Wallin and Arvid Norberg
   2
   3 // Permission is hereby granted, free of charge, to any person obtaining a
   4 // copy of this software and associated documentation files (the "Software"),
   5 // to deal in the Software without restriction, including without limitation
   6 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
   7 // and/or sell copies of the Software, and to permit persons to whom the
   8 // Software is furnished to do so, subject to the following conditions:
   9
  10 // The above copyright notice and this permission notice shall be included
  11 // in all copies or substantial portions of the Software.
  12
  13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
  14 // ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
  15 // TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
  16 // PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
  17 // SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
  18 // ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  19 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
  21 // OR OTHER DEALINGS IN THE SOFTWARE.
  22
  23 #if !BOOST_PP_IS_ITERATING
  24
  25 #ifndef LUABIND_CALC_ARITY_HPP_INCLUDED
  26 #define LUABIND_CALC_ARITY_HPP_INCLUDED
  27
  28 #define LUABIND_FIND_CONV(z,n,text) typedef typename find_conversion_policy<n + 1, Policies>::type p##n;
  29 #define LUABIND_CALC_ARITY(z,n,text) + BOOST_PP_CAT(p,n)::has_arg
  30
  31 namespace luabind { namespace detail
  32 {
  33         template<int N> struct calc_arity;
  34
  35         #define BOOST_PP_ITERATION_PARAMS_1 (4, (0, LUABIND_MAX_ARITY, <luabind/detail/calc_arity.hpp>, 1))
  36         #include BOOST_PP_ITERATE()
  37 }}
  38
  39 #undef LUABIND_CALC_ARITY
  40 #undef LUABIND_FIND_CONV
  41
  42
  43 #endif // LUABIND_CALC_ARITY_HPP_INCLUDED
  44
  45 #else // BOOST_PP_ITERATE
  46
  47         template<>
  48         struct calc_arity<BOOST_PP_ITERATION()>
  49         {
  50                 template<BOOST_PP_ENUM_PARAMS(LUABIND_MAX_ARITY, class A), class Policies>
  51                 static int apply(constructor<BOOST_PP_ENUM_PARAMS(LUABIND_MAX_ARITY, A)>, Policies*)
  52                 {
  53                         BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_FIND_CONV, _)
  54                         return 0 BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_CALC_ARITY, _);
  55                 }
  56         };
  57
  58 #endif
  59