src/class_info.cpp

   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 #define LUABIND_BUILDING
  24
  25 #include <luabind/lua_include.hpp>
  26
  27 #include <luabind/luabind.hpp>
  28 #include <luabind/class_info.hpp>
  29
  30 namespace luabind
  31 {
  32         LUABIND_API class_info get_class_info(argument const& o)
  33         {
  34                 lua_State* L = o.interpreter();
  35
  36                 o.push(L);
  37         detail::object_rep* obj = detail::is_class_object(L, -1);
  38
  39         if (!obj)
  40         {
  41             class_info result;
  42             result.name = lua_typename(L, -1);
  43             lua_pop(L, 1);
  44             result.methods = newtable(L);
  45             result.attributes = newtable(L);
  46             return result;
  47         }
  48
  49         lua_pop(L, 1);
  50
  51         obj->crep()->get_table(L);
  52         object table(from_stack(L, -1));
  53         lua_pop(L, 1);
  54
  55         class_info result;
  56         result.name = obj->crep()->name();
  57         result.methods = newtable(L);
  58         result.attributes = newtable(L);
  59
  60         std::size_t index = 1;
  61
  62         for (iterator i(table), e; i != e; ++i)
  63         {
  64             if (type(*i) != LUA_TFUNCTION)
  65                 continue;
  66
  67             // We have to create a temporary `object` here, otherwise the proxy
  68             // returned by operator->() will mess up the stack. This is a known
  69             // problem that probably doesn't show up in real code very often.
  70             object member(*i);
  71             member.push(L);
  72             detail::stack_pop pop(L, 1);
  73
  74             if (lua_tocfunction(L, -1) == &detail::property_tag)
  75             {
  76                 result.attributes[index++] = i.key();
  77             }
  78             else
  79             {
  80                 result.methods[i.key()] = *i;
  81             }
  82         }
  83
  84         return result;
  85         }
  86
  87         LUABIND_API void bind_class_info(lua_State* L)
  88         {
  89                 module(L)
  90                 [
  91                         class_<class_info>("class_info_data")
  92                                 .def_readonly("name", &class_info::name)
  93                                 .def_readonly("methods", &class_info::methods)
  94                                 .def_readonly("attributes", &class_info::attributes),
  95
  96                         def("class_info", &get_class_info)
  97                 ];
  98         }
  99 }
 100