Article View: comp.std.c++
Article #4051Re: references and ellipsis
From: James Kanze US/ESC 60/3/141 #407...
Date: Mon, 15 Apr 1996 20:32
Date: Mon, 15 Apr 1996 20:32
31 lines
2211 bytes
2211 bytes
In article <4kr1p3$67g@mulga.cs.mu.OZ.AU> fjh@munta.cs.mu.OZ.AU (Fergus
Henderson) writes:
|> clamage@Eng.Sun.COM (Steve Clamage) writes:
|> >According the draft standard, the results of using a reference
|> >type as the last pararmeter before the ellipsis (...) are
|> >undefined. See section 18.7 "Other runtime support" [lib.support.runtime].
|> Is there any good reason why this has undefined behaviour rather than
|> being ill-formed code? Surely this should be very easy for implementations
|> to detect and diagnose.
Historical reasons, no doubt. Declare the last parameter a char in C,
and you also get undefined behavior.
And it's surely no more difficult to diagnose a double underscore (and
at least one compiler does), which is also `undefined behavior'.
--
James Kanze Tel.: (+33) 88 14 49 00 email: kanze@gabi-soft.fr
GABI Software, Sarl., 8 rue des Francs-Bourgeois, F-67000 Strasbourg, France
Conseils, études et réalisations en logiciel orienté objet --
-- A la recherche d'une activité dans une region francophone
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Path: arc1-ca.pugleaf.net!engnews1.Eng.Sun.COM!taumet!clamage From: kanze@lts.sel.alcatel.de (James Kanze US/ESC 60/3/141 #40763) Newsgroups: comp.std.c++ Subject: Re: references and ellipsis Date: 15 Apr 1996 20:32:01 GMT Organization: GABI Software, Sarl. Sender: news@lts.sel.alcatel.de Approved: clamage@eng.sun.com (comp.std.c++) Message-ID: <KANZE.96Apr15211342@slsvgqt.lts.sel.alcatel.de> References: <4kop8j$ino@vishnu.jussieu.fr> <4kpd3v$2fb@engnews1.Eng.Sun.COM> <4kr1p3$67g@mulga.cs.mu.OZ.AU> NNTP-Posting-Host: taumet.eng.sun.com In-Reply-To: fjh@munta.cs.mu.OZ.AU's message of 14 Apr 1996 15:08:25 GMT Apparently-To: std-c++@ncar.ucar.edu Content-Length: 1073 X-Lines: 24 Originator: clamage@taumet