Add-override-hints
Add to the override-hints
See override-hints for a discussion of override-hints. Here
we describe how to extend the list of override-hints. Note that the effects
of add-override-hints events are local to the books
or encapsulate events in which they reside; see add-override-hints! to avoid that restriction. Also see set-override-hints to set a new list of override-hints to it, ignoring the
present list rather than adding to it.
General Forms:
(add-override-hints form)
(add-override-hints form :at-end t)
(add-override-hints form :at-end nil) ; default for :at-end
where form evaluates to a list of computed hint forms. The effect of
this event is to extend the current list of override-hints by appending
the result of that evaluation. The default is to append the evaluation result
to the front of the current list of override-hints, but if :at-end t is
specified, then the evaluation result is appended to the end of the current
list.
