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From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c
Subject: Re: Spurious diagnostic messages
Date: Wed, 20 May 2015 10:44:46 -0700
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Stephen Sprunk <stephen@sprunk.org> writes:
[...]
> OTOH, if what you really want is to detect letters and numbers in
> general, then there are various is*() functions that are far better for
> that purpose than anything the average programmer will come up with, and
> IMHO we shouldn't tempt him away from the correct solution by offering a
> better way to do the incorrect solution.

I suspect the average programmer wouldn't write a set of is*() and to*(
functions that have undefined behavior when called with a negative
`char` argument other than EOF.

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"