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 #include <luabind/detail/class_registry.hpp>
  30
  31 namespace luabind
  32 {
  33         LUABIND_API class_info get_class_info(argument const& o)
  34         {
  35                 lua_State* L = o.interpreter();
  36
  37                 o.push(L);
  38         detail::object_rep* obj = detail::get_instance(L, -1);
  39
  40         if (!obj)
  41         {
  42             class_info result;
  43             result.name = lua_typename(L, lua_type(L, -1));
  44             lua_pop(L, 1);
  45             result.methods = newtable(L);
  46             result.attributes = newtable(L);
  47             return result;
  48         }
  49
  50         lua_pop(L, 1);
  51
  52         obj->crep()->get_table(L);
  53         object table(from_stack(L, -1));
  54         lua_pop(L, 1);
  55
  56         class_info result;
  57         result.name = obj->crep()->name();
  58         result.methods = newtable(L);
  59         result.attributes = newtable(L);
  60
  61         std::size_t index = 1;
  62
  63         for (iterator i(table), e; i != e; ++i)
  64         {
  65             if (type(*i) != LUA_TFUNCTION)
  66                 continue;
  67
  68             // We have to create a temporary `object` here, otherwise the proxy
  69             // returned by operator->() will mess up the stack. This is a known
  70             // problem that probably doesn't show up in real code very often.
  71             object member(*i);
  72             member.push(L);
  73             detail::stack_pop pop(L, 1);
  74
  75             if (lua_tocfunction(L, -1) == &detail::property_tag)
  76             {
  77                 result.attributes[index++] = i.key();
  78             }
  79             else
  80             {
  81                 result.methods[i.key()] = *i;
  82             }
  83         }
  84
  85         return result;
  86         }
  87
  88     LUABIND_API object get_class_names(lua_State* L)
  89     {
  90         detail::class_registry* reg = detail::class_registry::get_registry(L);
  91
  92         std::map<type_id, detail::class_rep*> const& classes = reg->get_classes();
  93
  94         object result = newtable(L);
  95         std::size_t index = 1;
  96
  97         for (std::map<type_id, detail::class_rep*>::const_iterator iter = classes.begin();
  98             iter != classes.end(); ++iter)
  99         {
 100             result[index++] = iter->second->name();
 101         }
 102
 103         return result;
 104     }
 105
 106         LUABIND_API void bind_class_info(lua_State* L)
 107         {
 108                 module(L)
 109                 [
 110                         class_<class_info>("class_info_data")
 111                                 .def_readonly("name", &class_info::name)
 112                                 .def_readonly("methods", &class_info::methods)
 113                                 .def_readonly("attributes", &class_info::attributes),
 114
 115             def("class_info", &get_class_info),
 116             def("class_names", &get_class_names)
 117                 ];
 118         }
 119 }
 120