Path: utzoo!attcan!uunet!fernwood!apple!motcsd!mcdcup!mcdchg!tellab5!mtcchi!levy
From: levy@mtcchi.uucp (2656-Daniel R. Levy(0000000)0000)
Newsgroups: comp.lang.c
Subject: Re: Explicit cast of NULL (was Re: Short-circuiting conditions)
Message-ID: <1990Jul1.235042.28958@mtcchi.uucp>
Date: 1 Jul 90 23:50:42 GMT
References: <4556@thebes.Thalatta.COM> <111287@linus.mitre.org> <8860@crdgw1.crd.ge.com> <807@mwtech.UUCP> <9473@hubcap.clemson.edu> <16980@haddock.ima.isc.com> <DOA4ML5@ficc.ferranti.com>
Organization: Memorex Telex Corporation NSBG/STP
Lines: 20

peter@ficc.ferranti.com (Peter da Silva) writes:

>In article <16980@haddock.ima.isc.com> karl@haddock.ima.isc.com (Karl Heuer) writes:
>> An ANSI-to-Classic conversion tool could do the job, but
>> I haven't heard of one that inserts the necessary casts.

>And it still wouldn't take care of

>	execl("/bin/foo", "foo", "bar", (char *)NULL);

Devil's advocate: why not?  All it has to know is that all arguments to
execl must be of type char *.  By adding some more elaborate smarts to the
converter, this could be extended to many other (but, granted, not literally
ALL) varargs functions.  And in the cases of the functions the converter could
not handle, it could warn the user to fix them up manually.
-- 
Daniel R. Levy
Memorex Telex Corporation
Naperville IL
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