From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jamie Lokier <egcs@tantalophile.demon.co.uk>
To: Richard Henderson <rth@cygnus.com>
Cc: Craig Rodrigues <rodrigc@mediaone.net>, gcc@gcc.gnu.org
Subject: Re: warning: multi-line comment (why?)
Date: Mon, 18 Sep 2000 03:04:00 -0000
Message-id: <20000918120419.C17692@pcep-jamie.cern.ch>
References: <20000917185453.A14829@mediaone.net> <20000917162647.A19521@cygnus.com>
X-SW-Source: 2000-09/msg00397.html

Richard Henderson wrote:
> > What is the point of this warning?  Shouldn't the preprocessor
> > just ignore everything between the // and the end-of-line?
> 
> No, backslash-newline conversion happens before comments
> are discarded.  You really do have a multi-line comment;
> one that would be dangerous if your next line weren't a
> comment as well.

But the next line _is_ a comment so the warning is inappropriate here.

If this were a very unlikely situation, fair enough.  But people do
comment out multi-line macros from time to time using `//', and those
will trigger the warning.

It can't be too hard to skip whitespace and then check for `//' on the
next line I'm sure.

-- Jamie