fixes bug

binding/binding.h

@@ -232,6 +232,25 @@ namespace bee::lua {
         return *o;
     }
 
+    template <typename T, typename... Args>
+    T& newudata(lua_State* L, const char* name, void (*init_metatable)(lua_State*), Args&&... args) {
+        int nupvalue = 0;
+        if constexpr (udata_has_nupvalue<T>::value) {
+            nupvalue = udata<T>::nupvalue;
+        }
+        T* o = static_cast<T*>(lua_newuserdatauv(L, sizeof(T), nupvalue));
+        new (o) T(std::forward<Args>(args)...);
+        if (luaL_newmetatable(L, name)) {
+            if constexpr (!std::is_trivially_destructible<T>::value) {
+                lua_pushcfunction(L, destroyudata<T>);
+                lua_setfield(L, -2, "__gc");
+            }
+            init_metatable(L);
+        }
+        lua_setmetatable(L, -2);
+        return *o;
+    }
+
     template <typename T>
     T& checkudata(lua_State* L, int arg) {
         if constexpr (udata_has_name<T>::value) {

binding/lua_socket.cpp

@@ -12,13 +12,6 @@
 #include <bee/nonstd/unreachable.h>
 #include <bee/thread/simplethread.h>
 
-namespace bee::lua {
-    template <>
-    struct udata<net::fd_t> {
-        static inline auto name = "bee::net::fd";
-    };
-}
-
 namespace bee::lua_socket {
     static int push_neterror(lua_State* L, std::string_view msg) {
         auto error = make_neterror(msg);
@@ -369,10 +362,10 @@ namespace bee::lua_socket {
         luaL_setfuncs(L, mt, 0);
     }
     static void pushfd(lua_State* L, net::fd_t fd) {
-        lua::newudata<net::fd_t>(L, metatable, fd);
+        lua::newudata<net::fd_t>(L, "bee::net::fd", metatable, fd);
     }
     static void pushfd_no_ownership(lua_State* L, net::fd_t fd) {
-        lua::newudata<net::fd_t>(L, metatable_no_ownership, fd);
+        lua::newudata<net::fd_t>(L, "bee::net::fd (no ownership)", metatable_no_ownership, fd);
     }
     static int pair(lua_State* L) {
         net::fd_t sv[2];