inline T object_cast_impl(const Obj& obj, const Policies&) { typedef typename detail::find_conversion_policy<0, Policies>::type converter_policy; typename converter_policy::template generate_converter<T, lua_to_cpp>::type converter; obj.pushvalue(); lua_State* L = obj.lua_state(); detail::stack_pop p(L, 1); #ifndef LUABIND_NO_ERROR_CHECKING if (converter.match(L, LUABIND_DECORATE_TYPE(T), -1) < 0) { #ifndef LUABIND_NO_EXCEPTIONS throw cast_failed(L, LUABIND_TYPEID(T)); #else cast_failed_callback_fun e = detail::error_callback::get().cast; if (e) e(L, LUABIND_TYPEID(T)); assert(0 && "object_cast failed. If you want to handle this error use luabind::set_error_callback()"); std::terminate(); #endif } #endif return converter.apply(L, LUABIND_DECORATE_TYPE(T), -1); }
boost::optional<T> object_cast_nothrow_impl(const Obj& obj, const Policies&) { typedef typename detail::find_conversion_policy<0, Policies>::type converter_policy; typename mpl::apply_wrap2<converter_policy,T,lua_to_cpp>::type converter; if (obj.lua_state() == 0) return boost::optional<T>(); LUABIND_CHECK_STACK(obj.lua_state()); obj.pushvalue(); lua_State* L = obj.lua_state(); detail::stack_pop p(L, 1); #ifndef LUABIND_NO_ERROR_CHECKING if (converter.match(L, LUABIND_DECORATE_TYPE(T), -1) < 0) return boost::optional<T>(); #endif return boost::optional<T>(converter.apply(L, LUABIND_DECORATE_TYPE(T), -1)); }