Path: csiph.com!eternal-september.org!feeder.eternal-september.org!mx02.eternal-september.org!.POSTED!not-for-mail
From: Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups: comp.programming
Subject: Re: Here is why C++ and C are bad...
Date: Wed, 30 Dec 2015 15:48:42 +0000
Organization: A noiseless patient Spider
Lines: 31
Message-ID: <87h9j06ip1.fsf@bsb.me.uk>
References: <n5kdn4$cji$1@dont-email.me> <n5uqdd$gin$1@dont-email.me> <n5v0di$7i3$1@dont-email.me> <n5v0p5$8s3$1@dont-email.me> <n6063m$ccb$1@dont-email.me> <n60m14$lf$1@dont-email.me>
Mime-Version: 1.0
Content-Type: text/plain
Injection-Info: mx02.eternal-september.org; posting-host="017616aa25f81ec581c44d76d61ba2f3"; logging-data="30951"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1+CPZPpe4zAVxlUeoC6cpSUG029360LXPw="
Cancel-Lock: sha1:pT3/FA+Cjv241Om/l4se+QZGDkQ= sha1:xa/fUiQz/YdOmngDEC1C61V3nyU=
X-BSB-Auth: 1.ac697cbb640a947324e8.20151230154842GMT.87h9j06ip1.fsf@bsb.me.uk
Xref: csiph.com comp.programming:6080

Richard Heathfield <rjh@cpax.org.uk> writes:

> On 30/12/15 08:56, David Brown wrote:
>> On 29/12/15 23:19, Richard Heathfield wrote:
>
> <snip>
>
>>> 2) mixing of signed and unsigned expressions is very often a sign that
>>> the program hasn't been thought through properly. This, too, is (I
>>> think) a discussion that might also turn out to be profitable, despite
>>> its origins.
>>
>> Perhaps that could usefully be discussed here, since it is an issue that
>> can affect many languages.
>
> Oddly, the signed/unsigned dilemma is one that can bite us even if we
> are only dealing exclusively (or so we think) with unsigned
> values.

Since this is comp.programming, you should perhaps have said that mixing
signed and unsigned expressions _in C_ is often a bad sign.  It may be
in other languages too, but there are others in which it is both common
and harmless.

The points you go on to make are about problems in the way C defines the
behaviour of such mixed-type expressions -- they aren't programming
problems per se.

<snip>
-- 
Ben.