🚀 go-pugleaf

In article <2031@uoregon.uoregon.edu>, markv@uoregon.uoregon.edu (Mark VandeWettering) writes:
> 	Uses of the cpp should be:
> 	3.	Hide awkward dereferencing of nested pointer structures,
> 		esp complicated unions....

Another use that's related to this is replacing things like

	for (ptr = stuff->things; ptr != NULL; ptr = ptr->next)

with

	foreach_thing(stuff, ptr)

This has the advantage of hiding the representation of the set, so that
if you change it to a hash table or an array you needn't change all your
code.  I think it's pretty obvious what it does, even though it does
modify the syntax.

Of course, it goes without saying that

#define WHILE(s) while (s) {
#define ELIHW }

is an evil thing...

	Wayne