luabind/detail/property.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 #ifndef LUABIND_PROPERTY_HPP_INCLUDED
  25 #define LUABIND_PROPERTY_HPP_INCLUDED
  26
  27 #include <luabind/config.hpp>
  28
  29 namespace luabind { namespace detail
  30 {
  31         class object_rep;
  32 /*
  33         template<class R, class T, class Policies>
  34         int get(R(T::*f)() const, T* obj, lua_State* L, Policies* policies)  { return returns<R>::call(f, obj, L, policies); }
  35
  36         template<class R, class T, class Policies>
  37         int get(R(*f)(const T*), T* obj, lua_State* L, Policies* policies) { return returns<R>::call(f, obj, L, policies); }
  38
  39         template<class R, class T, class Policies>
  40         int get(R(*f)(const T&), T* obj, lua_State* L, Policies* policies) { return returns<R>::call(f, obj, L, policies); }
  41 */
  42
  43         template<class R, class T, class Policies>
  44         int get(R(T::*f)() const, T* obj, lua_State* L, Policies* policies)  { return returns<R>::call(f, obj, L, policies); }
  45
  46         template<class R, class T, class U, class Policies>
  47         int get(R(*f)(T), U* obj, lua_State* L, Policies* policies) { return returns<R>::call(f, obj, L, policies); }
  48
  49         template<class T, class F, class Policies>
  50         struct get_caller : Policies
  51         {
  52                 get_caller() {}
  53                 get_caller(const Policies& p): Policies(p) {}
  54
  55                 int operator()(lua_State* L, int pointer_offset, F f)
  56                 {
  57                         // parameters on the lua stack:
  58                         // 1. object_rep
  59                         // 2. key (property name)
  60
  61                         object_rep* obj = static_cast<object_rep*>(lua_touserdata(L, 1));
  62                         return get(f, reinterpret_cast<T*>(static_cast<char*>(obj->ptr()) + pointer_offset), L, static_cast<Policies*>(this));
  63                 }
  64         };
  65
  66         template<class T, class A1, class Policies>
  67         int set(void(T::*f)(A1), T* obj, lua_State* L, Policies* policies)  { return returns<void>::call(f, obj, L, policies); }
  68 /*
  69         template<class R, class T, class A1, class Policies>
  70         int set(void(*f)(T*, A1), T* obj, lua_State* L, Policies* policies) { return returns<void>::call(f, obj, L, policies); }
  71
  72         template<class T, class A1, class Policies>
  73         int set(void(*f)(T&, A1), T* obj, lua_State* L, Policies* policies) { return returns<void>::call(f, obj, L, policies); }
  74 */
  75
  76         template<class T, class U, class A1, class Policies>
  77         int set(void(*f)(T, A1), U* obj, lua_State* L, Policies* policies) { return returns<void>::call(f, obj, L, policies); }
  78
  79         template<class T, class F, class Policies>
  80         struct set_caller : Policies
  81         {
  82                 int operator()(lua_State* L, int pointer_offset, F f)
  83                 {
  84                         // parameters on the lua stack:
  85                         // 1. object_rep
  86                         // 2. key (property name)
  87                         // 3. value
  88
  89                         // and since call() expects it's first
  90                         // parameter on index 2 we need to
  91                         // remove the key-parameter (parameter 2).
  92                         object_rep* obj = reinterpret_cast<object_rep*>(lua_touserdata(L, 1));
  93                         lua_remove(L, 2);
  94                         return set(f, reinterpret_cast<T*>(static_cast<char*>(obj->ptr()) + pointer_offset), L, static_cast<Policies*>(this));
  95                 }
  96         };
  97
  98         // TODO: add support for policies
  99         template<class T, class D, class Policies>
 100         struct auto_set : Policies
 101         {
 102                 auto_set() {}
 103                 auto_set(const Policies& p): Policies(p) {}
 104
 105                 int operator()(lua_State* L, int pointer_offset, D T::*member)
 106                 {
 107                         int nargs = lua_gettop(L);
 108
 109                         // parameters on the lua stack:
 110                         // 1. object_rep
 111                         // 2. key (property name)
 112                         // 3. value
 113                         object_rep* obj = static_cast<object_rep*>(lua_touserdata(L, 1));
 114                         T* ptr =  reinterpret_cast<T*>(static_cast<char*>(obj->ptr()) + pointer_offset);
 115
 116                         typedef typename find_conversion_policy<1,Policies>::type converter_policy;
 117                         typename converter_policy::template generate_converter<D,lua_to_cpp>::type converter;
 118                         ptr->*member = converter.apply(L, LUABIND_DECORATE_TYPE(D), 3);
 119
 120                         int nret = lua_gettop(L) - nargs;
 121
 122                         const int indices[] = { 1, nargs + nret, 3 };
 123
 124                         policy_list_postcall<Policies>::apply(L, indices);
 125
 126                         return nret;
 127                 }
 128         };
 129
 130         // TODO: add support for policies
 131         template<class T, class D, class Policies>
 132         struct auto_get : Policies
 133         {
 134                 auto_get() {}
 135                 auto_get(const Policies& p): Policies(p) {}
 136
 137                 int operator()(lua_State* L, int pointer_offset, D T::*member)
 138                 {
 139                         int nargs = lua_gettop(L);
 140
 141                         // parameters on the lua stack:
 142                         // 1. object_rep
 143                         // 2. key (property name)
 144                         object_rep* obj = static_cast<object_rep*>(lua_touserdata(L, 1));
 145                         T* ptr =  reinterpret_cast<T*>(static_cast<char*>(obj->ptr()) + pointer_offset);
 146
 147                         typedef typename find_conversion_policy<0,Policies>::type converter_policy;
 148                         typename converter_policy::template generate_converter<D,cpp_to_lua>::type converter;
 149                         converter.apply(L, ptr->*member);
 150
 151                         int nret = lua_gettop(L) - nargs;
 152
 153                         const int indices[] = { 1, nargs + nret };
 154
 155                         policy_list_postcall<Policies>::apply(L, indices);
 156
 157                         return nret;
 158                 }
 159         };
 160
 161 }}
 162
 163 #endif // LUABIND_PROPERTY_HPP_INCLUDED
 164