Metatable
public text v1 · immutablelua_newtable(sl_gstate); // the global metatable
lua_pushcfunction(sl_gstate, typel_mtindex);
lua_setfield(sl_gstate, -2, "__index");
lua_pushcfunction(sl_gstate, typel_mtnewindex);
lua_setfield(sl_gstate, -2, "__newindex");
lua_pushcfunction(sl_gstate, typel_mtgc);
lua_setfield(sl_gstate, -2, "__gc");
typel_mtref = luaL_ref(sl_gstate, LUA_REGISTRYINDEX);