Article View: comp.std.c
Article #804Re: What is a constant expression
From: Dave Jones
Date: Fri, 20 Oct 1989 22:40
Date: Fri, 20 Oct 1989 22:40
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From article <1219@crdos1.crd.ge.COM>, by davidsen@crdos1.crd.ge.COM (Wm E Davidsen Jr):
>
...
> Background: large program, defines ASCII control characters with a
> macro as follows:
> #define CNTL(c) ('c' & 037)
> While this work fine with pcc, the ANSI preprocessor doesn't expand it.
How about
#define CNTL(c) ((c) & 037)
Then change all occurances of the form
CNTL(x)
into
CNTL('x')
(Use an AWK program to automate things, if there's a bunch of them.)
Ain't that the "right" way to do it?
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arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!gem.mps.ohio-state.edu!apple!claris!sts!cohesive!megatest!djonesReferences:
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!gem.mps.ohio-state.edu!apple!claris!sts!cohesive!megatest!djones From: djones@megatest.UUCP (Dave Jones) Newsgroups: comp.std.c Subject: Re: What is a constant expression Message-ID: <8891@goofy.megatest.UUCP> Date: 20 Oct 89 22:40:41 GMT References: <1219@crdos1.crd.ge.COM> Organization: Megatest Corporation, San Jose, Ca Lines: 22