13.3.3 List Item Range Functions

Item range functions operate on list elements between two ends, two elements indicated by the index in the list. The end items are included in the operation.

The end items are further identified as p (head or first given item index) and q (tail or second given item index).

If q indicates an element prior to p the elements starting with the p indexed one to the end of the list and those from the beginning of the list to the q indexed one are operated (as if the list was circular).

• l_erase
• lq_clear
• lq_xcall

list l_erase(list l, integer p, integer q);

list lq_clear(list l, integer p, integer q);

object lq_xcall(list l, object o, integer i, integer p, integer q, &...);