Re: Argument widening on varadic functions

Article View: comp.std.c

Article #5571

#5571

From: Rich Salz
Date: Tue, 10 Jan 1989 18:15

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In <1329@fig.bbn.com> (an article I just cancelled) I asked
 Does argument widening happen for <stdarg.h> functions?  Judging from the
 description of printf (i.e., "%f" prints a float argument), it seems
 that's the case.

And it is, in fact, the case.  Thanks to Leendert van Doorn <leendert@cs.vu.nl>
for the reference, paragraph 3.3.2.2:
 The ellipsis notation in a function prototype declarator causes
 argument type conversion to stop after the last declared parameter.
 The default argument promotions are performed on trailing arguments

Other speedy replies came from Doug Gwyn <gwyn@BRL.MIL>, Chris
Torek <chris@mimsy.umd.edu>, and Roland McGrath <mcgrath@homer.Berkeley.EDU>

Thanks!
	/rich $alz
-- 
Please send comp.sources.unix-related mail to rsalz@uunet.uu.net.

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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!ames!mailrus!bbn!bbn.com!rsalz

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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!ames!mailrus!bbn!bbn.com!rsalz
From: rsalz@bbn.com (Rich Salz)
Newsgroups: comp.std.c
Subject: Re: Argument widening on varadic functions
Message-ID: <1331@fig.bbn.com>
Date: 10 Jan 89 18:15:49 GMT
References: <1329@fig.bbn.com>
Organization: BBN Systems and Technologies Corporation
Lines: 18

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