Loop in AS macro

Hello,

I wanted to throw my $0.02 in :)

Tools used to expand AS-MACRO/as-set's need to be aware of the 
looping problem (and thus there is a bit more work for the programmer)
but this is an implementation issue only.

Also, there is a problem if you try to force consistency. eg,  

as-set: as-foo
members: as-bar, as-x

as-set: as-bar
members: as-foo, as-y

So to fix the loop you would need to rewrite the members
for both set's to:

members: as-x, as-y

But in doing so you remove the link between as-foo and as-bar.
So if as-foo were to add as-z then this would not be picked
up in as-bar.  eg, 

as-set: as-foo
members: as-x, as-y, as-z

as-set: as-bar
members: as-x, as-y

--jerry