-#define Get_obj(ID,MEM,INTERFACE) MEM ID=get_obj(MEM,INTERFACE)
-#define get_obj_as(COMMUNITY,MEM,INTERFACE) (COMMUNITY)get_obj(MEM,INTERFACE)
-#define Get_obj_as(ID,COMMUNITY,MEM,INTERFACE) MEM ID=get_obj_as(COMMUNITY,MEM,INTERFACE)
-#define _(METHOD,...) ( _ASSERT(ARG1(__VA_ARGS__,)), (*( ARG1(__VA_ARGS__,)->__interface->METHOD )) ( __VA_ARGS__ ) )
-#define __(METHOD,...) ( _ASSERT(ARG1(__VA_ARGS__,)), (*( __cll1_seekmethod(ARG1(__VA_ARGS__,)->__interface,METHOD) )) ( __VA_ARGS__ ) )
-#define call(OBJTYPE,METHOD,...) { int _N=0; OBJTYPE _OBJ; /* <-' */ while( (_OBJ=(OBJTYPE)_cll1_for_ptrs(_N++,__VA_ARGS__,NIL))!=(struct OBJTYPE *)NIL ) _(_OBJ,METHOD); }
-#define def_community(TYPE,INTERFACE) def_mem(TYPE) { INTERFACE __interface; };
+#define get_obj_as(COMMUNITY,MEM,INTERFACE,...) (COMMUNITY)get_obj(MEM,INTERFACE,__VA_ARGS__)
+#define _(METHOD,...) ((((_ARG1(__VA_ARGS__,)) || /* will not compile if object is not lvalue: */(_ARG1(__VA_ARGS__,)=NULL)) && (_ARG1(__VA_ARGS__,))->__interface->METHOD)?(*( (_ARG1(__VA_ARGS__,))->__interface->METHOD )) ((void *)__VA_ARGS__):0)
+#define __(METHOD,...) ( _ASSERT(ARG1(__VA_ARGS__,)), (*( __cll1_seekmethod(ARG1(__VA_ARGS__,),METHOD) )) ( __VA_ARGS__ ) )
+#define call(OBJTYPE,METHOD,...) { int _N=0; OBJTYPE _OBJ; /* <-' */ while( (_OBJ=(OBJTYPE)_cll1_for_ptrs(_N++,__VA_ARGS__,NIL))!=(OBJTYPE)NIL ) _(_OBJ,METHOD); }
+#define def_community(TYPE,INTERFACE) def_obj(TYPE) { INTERFACE __interface; };