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