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Re: the standard of c++ supported by gcc

From: Neil Booth <neil at daikokuya dot co dot uk>
To: Phil Edwards <phil at jaj dot com>
Cc: luda_s <luda_s at sina dot com>, gcc at gcc dot gnu dot org
Date: Thu, 19 Sep 2002 00:22:14 +0100
Subject: Re: the standard of c++ supported by gcc
References: <20020918024947.27283.qmail@sina.com> <20020918190700.A20520@disaster.jaj.com>

Phil Edwards wrote:-

> On Wed, Sep 18, 2002 at 10:49:47AM +0800, luda_s wrote:
> > Dear gcc fellows: 
> > I want to know the standard of c++ supported by gcc,does gcc support ISO98 compeletely ? 
> 
> Not completely.  No compiler supports it completely yet.

EDG claim they do, though their preprocessor is non-conforming in
quite a few pedantic ways I've found.  e.g. it fails on

#define f(x, y) y
#define g f(
f(g, 2)

claiming an unterminated macro invocation.  However, since x does
not appear in f's expansion, it should not be pre-expanded, and
the code is legal.

Others include "#if##" ICE-ing, and trigraphs not being replaced in
the message of a #error (and they also ignore escaped newlines
in #error).

8-)

Neil.

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