luabind/detail/overload_rep.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
  24 #if !BOOST_PP_IS_ITERATING
  25
  26 #ifndef LUABIND_OVERLOAD_REP_HPP_INCLUDED
  27 #define LUABIND_OVERLOAD_REP_HPP_INCLUDED
  28
  29 #include <luabind/config.hpp>
  30
  31 #include <boost/preprocessor/enum_params.hpp>
  32 #include <boost/preprocessor/iteration/iterate.hpp>
  33 #include <boost/preprocessor/repeat.hpp>
  34
  35 #include <luabind/detail/overload_rep_base.hpp>
  36
  37 namespace luabind { namespace detail
  38 {
  39         struct dummy_ {};
  40
  41         // this class represents a specific overload of a member-function.
  42         struct overload_rep: public overload_rep_base
  43         {
  44                 #define BOOST_PP_ITERATION_PARAMS_1 (4, (0, LUABIND_MAX_ARITY, <luabind/detail/overload_rep.hpp>, 1))
  45                 #include BOOST_PP_ITERATE()
  46
  47                 bool operator==(const overload_rep& o)
  48                 {
  49                         if (o.m_const != m_const) return false;
  50                         if (o.m_arity != m_arity) return false;
  51                         if (o.m_num_args != m_num_args) return false;
  52                         for (int i = 0; i < m_num_args; ++i)
  53                                 if (!(LUABIND_TYPE_INFO_EQUAL(m_params[i], o.m_params[i]))) return false;
  54                         return true;
  55                 }
  56
  57 //              inline int match(lua_State* L, int num_params) const { if (num_params != m_arity) return -1; return m_match_fun(L); }
  58
  59                 void add_offset(int offset) throw() { m_pointer_offset += offset; }
  60                 int offset() const throw() { return m_pointer_offset; }
  61
  62                 inline void set_fun(boost::function2<int,lua_State*,void*>& f) { call_fun = f; }
  63                 inline int call(lua_State* L, const object_rep& o) const { return call_fun(L, o.ptr(m_pointer_offset)); }
  64
  65                 boost::function2<int,lua_State*,void*> call_fun;
  66
  67         private:
  68
  69                 // the offset we need to apply to the object pointer when calling this method.
  70                 // it depends on which class_rep this method is found in
  71                 int m_pointer_offset;
  72
  73                 // the number of parameters this overload takes
  74                 // these are used to detect when a method is overridden by a derived class.
  75 //              int m_arity;
  76                 int m_num_args;
  77                 // the types of the parameter it takes
  78                 LUABIND_TYPE_INFO m_params[LUABIND_MAX_ARITY];
  79                 // is true if the overload is const (this is a part of the signature)
  80                 bool m_const;
  81         };
  82
  83 }} // namespace luabind::detail
  84
  85 #endif // LUABIND_OVERLOAD_REP_HPP_INCLUDED
  86
  87 #elif BOOST_PP_ITERATION_FLAGS() == 1
  88
  89 #define LUABIND_PARAM(z, n, _) m_params[n] =LUABIND_TYPEID(A##n);
  90 #define LUABIND_POLICY_DECL(z,n,text) typedef typename find_conversion_policy<n + 1, Policies>::type BOOST_PP_CAT(p,n);
  91 #define LUABIND_ARITY(z,n,text) + BOOST_PP_CAT(p,n)::has_arg
  92
  93                 // overloaded template funtion that initializes the parameter list
  94                 // called m_params and the m_arity member.
  95                 template<class R, class T BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A), class Policies>
  96                 overload_rep(R(T::*)(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), A)), Policies*)
  97                         : m_pointer_offset(0)
  98                         , m_num_args(BOOST_PP_ITERATION())
  99                         , m_const(false)
 100                 {
 101                         BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_PARAM, _)
 102                         BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_POLICY_DECL, _)
 103                         m_arity = 0 BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_ARITY, 0);
 104                 }
 105
 106                 template<class R, class T BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A), class Policies>
 107                 overload_rep(R(T::*)(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), A)) const, Policies*)
 108                         : m_pointer_offset(0)
 109                         , m_num_args(BOOST_PP_ITERATION())
 110                         , m_const(true)
 111                 {
 112                         BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_PARAM, _)
 113                         BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_POLICY_DECL, _)
 114                         m_arity = 0 BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_ARITY, 0);
 115                 }
 116
 117                 // non-member functions
 118
 119                 template<class R, class T BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A), class Policies>
 120                 overload_rep(R(*)(T* BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), A)), Policies*)
 121                         : m_pointer_offset(0)
 122                         , m_num_args(BOOST_PP_ITERATION())
 123                         , m_const(false)
 124                 {
 125                         BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_PARAM, _)
 126                         BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_POLICY_DECL, _)
 127                         m_arity = 0 BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_ARITY, 0);
 128                 }
 129
 130                 template<class R, class T BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A), class Policies>
 131                 overload_rep(R(*)(const T* BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), A)), Policies*)
 132                         : m_pointer_offset(0)
 133                         , m_num_args(BOOST_PP_ITERATION())
 134                         , m_const(true)
 135                 {
 136                         BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_PARAM, _)
 137                         BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_POLICY_DECL, _)
 138                         m_arity = 0 BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_ARITY, 0);
 139                 }
 140
 141                 template<class R, class T BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A), class Policies>
 142                 overload_rep(R(*)(T& BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), A)), Policies*)
 143                         : m_pointer_offset(0)
 144                         , m_num_args(BOOST_PP_ITERATION())
 145                         , m_const(false)
 146                 {
 147                         BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_PARAM, _);
 148                         BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_POLICY_DECL, _)
 149                         m_arity = 0 BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_ARITY, 0);
 150                 }
 151
 152                 template<class R, class T BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), class A), class Policies>
 153                 overload_rep(R(*)(const T& BOOST_PP_COMMA_IF(BOOST_PP_ITERATION()) BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), A)), Policies*)
 154                         : m_pointer_offset(0)
 155                         , m_num_args(BOOST_PP_ITERATION())
 156                         , m_const(true)
 157                 {
 158                         BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_PARAM, _)
 159                         BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_POLICY_DECL, _)
 160                         m_arity = 0 BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_ARITY, 0);
 161                 }
 162
 163 #undef LUABIND_PARAM
 164
 165 #endif