__vsiz
* __vali (T) + __vsiz (T))
((AP)[1] <= 48 && (__vpad ((AP)[1], T) > 48 || __vsiz (T) > 16)) \
? ((AP)[1] = 48 + __vsiz (T)) \
*((T *) (void *) ((char *) *(AP) + (AP)[1] - __vsiz (T))) \