Path: utzoo!mnetor!uunet!mcvax!enea!tut!santra!news
From: news@santra.UUCP (news)
Newsgroups: comp.lang.misc
Subject: Yields clause in CLU
Message-ID: <11958@santra.UUCP>
Date: 14 Apr 88 07:43:34 GMT
Reply-To: nbo@hut.UUCP (Nassim Bouteldja)
Organization: Helsinki University of Technology
Lines: 4
Keywords: Iterator abstraction, CLU, ADT

Why is the "Yields" clause in the iterator abstraction in CLU optional.
This means that I can write an iterator abstraction that is not meant to
return any object, but rather for its side-effect. 
Isn't that contradictory with the idea of an iterator abstraction?