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From: kaz@vision.crest.nt.com (Kaz Kylheku)
Subject: Re: Not intended for use in medical,
Date: 1997/05/07
Message-ID: <5kqg8d$95@bcrkh13.bnr.ca>#1/1
X-Deja-AN: 240027002
References: <3.0.32.19970423164855.00746db8@mail.4dcomm.com>
 <5kl9qc$g4d@bcrkh13.bnr.ca> <5kmek2$9re@bcrkh13.bnr.ca>
 <E9rMuy.Hs0@world.std.com>
Organization: Prism Systems Inc.
Newsgroups: comp.lang.ada
Date: 1997-05-07T00:00:00+00:00
List-Id: <comp.lang.ada>


In article <E9rMuy.Hs0@world.std.com>,
Robert A Duff <bobduff@world.std.com> wrote:
>In article <5kmek2$9re@bcrkh13.bnr.ca>,
>Kaz Kylheku <kaz@vision.crest.nt.com> wrote:
>>>>  Yes, legal, but horrible. A good reminder of why Ada does NOT have
>>>>  the ++ operator built in :-)
>>
>>By the way, the x++ is just another way of writing the assignment expression x
>>+= 1, or x = x + 1 (the latter case evaluates x twice, of course).  The real
>>``evil'' perhaps is that in C an assignment is an expression rather than a
>>statement, so that you can decorate a complex expression with assignments all
>>over the place.
>
>I agree (except I'd remove "perhaps").  There's nothing wrong with
>having short-hand notations like "++" and "+=".  The language design
>flaw in C is that assignments return something "useful", thus
>encouraging side effects nested within expressions, like a[i++].
>I'm not against *all* kinds of side effects, but I'm against most of
>them, including the one mentioned above.

Wouldn't you agree that C++ amplifies this problem greatly by not only
allowing assigments to return something, but also by allowing assignments
to serve as l-values? And without proper sequencing at that.