Re: Improve list manipulation in several places

Em sex., 21 de abr. de 2023 às 04:34, Richard Guo <guofenglinux@gmail.com>
escreveu:

> There was discussion in [1] about improvements to list manipulation in
> several places.  But since the discussion is not related to the topic in
> that thread, fork a new thread here and attach a patch to show my
> thoughts.
>
> Some are just cosmetic changes by using macros.  The others should have
> performance gain from the avoidance of moving list entries.  But I doubt
> the performance gain can be noticed or measured, as currently there are
> only a few places affected by the change.  I still think the changes are
> worthwhile though, because it is very likely that future usage of the
> same scenario can benefit from these changes.
>
+1

Perhaps list_delete_nth_cell needs to check NIL too?
+ if (list == NIL)
+ return NIL;

+lcons_copy(void *datum, const List *list)
+lappend_copy(const List *list, void *datum)
list param pointer can be const here not?

regards,
Ranier Vilela