examples/intrusive_ptr/any_converter.cpp

   1 template<class T>
   2 struct convert_any
   3 {
   4         static void convert(lua_State* L, const boost::any& a)
   5         {
   6                 typename luabind::detail::default_converter::template generate_converter<T>::type conv;
   7                 conv.apply(any_cast<T>(&a));
   8         }
   9 };
  10
  11 std::map<const std::type_info*, void(*)(const boost::any&)> any_converters;
  12
  13 template<class T>
  14 void register_any_converter()
  15 {
  16         any_converters[&typeid(T)] = convert_any<T>::convert;
  17 }
  18
  19 namespace luabind
  20 {
  21         namespace converters
  22         {
  23                 yes_t is_user_defined(by_value<boost::any>);
  24                 yes_t is_user_defined(by_const_reference<boost::any>);
  25
  26                 void convert_cpp_to_lua(lua_State* L, const boost::any& a)
  27                 {
  28                         typedef void(*conv_t)(const boost::any&);
  29                         conv_t conv = any_converters[&a.type()];
  30                         conv(L, a);
  31                 }
  32         }
  33 }
  34
  35 boost::any f()
  36 {
  37         return "foobar";
  38 }
  39
  40 int main()
  41 {
  42         register_any_converter<int>();
  43         register_any_converter<float>();
  44         register_any_converter<const char*>();
  45         register_any_converter<std::string>();
  46         register_any_converter<boost::intrusive_ptr<Actor> >();
  47
  48         lua_State* L = lua_open();
  49
  50         function(L, "f", &f);
  51
  52         lua_close(L);
  53 }
  54