places where sets are useful

[Roger Hale]

(From: Brandon Allbery <ncoast!bsa>)
> In a project I'm involved in, I was going to use the following:
> 
> #define PLUS |
> #define MINUS &~
> #define IN &
> 
> #define ELEM_1 01
> ...
> if (ELEM_1 IN bunch) ...
(Forgive me if I've misquoted slightly)

I find this appealing, in a way.  My question for the day:

I can say
	bunch PLUS= ELEM_1;
but not
	bunch MINUS= ELEM_1;
Is this an argument for an
	&~=
assignment operator?  :=)

Yours,		Roger Hale	(roger at ll-sst.arpa)