From: Ben Bacarisse <ben.usenet@bsb.me.uk>
To: help-gnu-emacs@gnu.org
Subject: Re: insert-header-preprocessor-definition
Date: Wed, 11 Apr 2018 21:56:28 +0100 [thread overview]
Message-ID: <87y3htzclf.fsf@bsb.me.uk> (raw)
In-Reply-To: 86zi29earx.fsf@zoho.com
Emanuel Berg <moasen@zoho.com> writes:
> Ben Bacarisse wrote:
>
>> this common construction can give rise to C's
>> dreaded "undefined behaviour". All sorts of
>> macro names are reserved to the
>> implementation depending on what headers have
>> been included in the source file that
>> includes this one.
>>
>> It's common to ignore this rule, but if you
>> are providing a facility for general use it
>> might be better to follow letter of the law.
>> Pre-pending "H_" to the label is known to
>> be safe.
>
> I agree. So for color.c, color.h should have
> H_COLOR_H?
That is safe, yes. Doing it by hand, I think most people write H_COLOR
but you can't even be sure there will be a .h in the name! Actually, I
like the symmetry, now that I see it, and I may use this myself.
<snip>
--
Ben.
next prev parent reply other threads:[~2018-04-11 20:56 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <86fu429udy.fsf@zoho.com>
2018-04-11 15:47 ` insert-header-preprocessor-definition Ben Bacarisse
2018-04-11 20:41 ` insert-header-preprocessor-definition Emanuel Berg
2018-04-11 20:56 ` Ben Bacarisse [this message]
2018-04-11 22:07 ` insert-header-preprocessor-definition Emanuel Berg
2018-04-14 23:54 ` insert-header-preprocessor-definition Emanuel Berg
2018-04-15 1:02 ` insert-header-preprocessor-definition Ben Bacarisse
2018-04-15 7:44 ` insert-header-preprocessor-definition Yuri Khan
2018-04-15 19:35 ` insert-header-preprocessor-definition Emanuel Berg
2018-04-15 21:10 ` insert-header-preprocessor-definition Ben Bacarisse
2018-04-15 21:45 ` insert-header-preprocessor-definition Emanuel Berg
[not found] ` <mailman.12420.1523778312.27995.help-gnu-emacs@gnu.org>
2018-04-15 19:46 ` insert-header-preprocessor-definition Emanuel Berg
2018-04-16 5:35 ` insert-header-preprocessor-definition Yuri Khan
[not found] ` <mailman.12486.1523856961.27995.help-gnu-emacs@gnu.org>
2018-04-16 6:16 ` insert-header-preprocessor-definition Emanuel Berg
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