vb first = alloc (&_, T_LINK); detach (first, list, REDUCE_LIST);

vb first = alloc (&_, T_LINK); detach (first,&list, REDUCE_LIST);

vb first = alloc (&_, T_LINK); detach (first,list, REDUCE_LIST, ALLOW_EMPTY);

vb first = alloc (&_, T_LINK); detach (first,&list, REDUCE_LIST, ALLOW_EMPTY);


