Article View: comp.std.c
Article #5957Re: Variable arguments in macros
From: Karl Heuer
Date: Fri, 28 Apr 1989 00:21
Date: Fri, 28 Apr 1989 00:21
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1136 bytes
In article <58345@yale-celray.yale.UUCP> leichter@CS.YALE.EDU (Jerry Leichter (LEICHTER-JERRY@CS.YALE.EDU)) writes: >[allow an ellipsis in the macro parameters, and have a builtin macro _REST_ >which] expands to the list of remaining arguments, including a leading comma >if there is at least one such argument. Not good enough. Consider: #define f(a,b,...) (g(a,b),h(_REST_)) in which, for syntactic correctness, _REST_ must exclude the leading comma. I suspect this was the major reason that variadic macros didn't make it into the Standard: there was no clean proposal that handled the case with zero additional args. Karl W. Z. Heuer (ima!haddock!karl or karl@haddock.isc.com), The Walking Lint
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!decwrl!decvax!ima!haddock!karl From: karl@haddock.ima.isc.com (Karl Heuer) Newsgroups: comp.std.c Subject: Re: Variable arguments in macros Message-ID: <12839@haddock.ima.isc.com> Date: 28 Apr 89 00:21:14 GMT References: <58345@yale-celray.yale.UUCP> Reply-To: karl@haddock.ima.isc.com (Karl Heuer) Organization: Interactive Systems, Boston Lines: 13