From: Emanuel Berg <moasen@zoho.com>
To: help-gnu-emacs@gnu.org
Subject: Re: insert-header-preprocessor-definition
Date: Sun, 15 Apr 2018 01:54:49 +0200 [thread overview]
Message-ID: <86po317392.fsf@zoho.com> (raw)
In-Reply-To: 87y3htzclf.fsf@bsb.me.uk
Ben Bacarisse wrote:
> That is safe, yes. Doing it by hand, I think
> most people write H_COLOR [...] Actually,
> I like the symmetry
I like symmetry too but not for symmetry's
sake, so I removed the part that transformed
".h" into "_H" - which, ironically, I didn't
put there for the symmetry! Anyway now it is
just H_COLOR. [1]
Also, altho I've thought about this on and off
since I heard of it, I have failed to come to
terms with the underlying issue. How can
COLOR_H lead to an error when H_COLOR (or
H_COLOR_H) doesn't?
Because the syntax is the same, and all letters
are plain ASCII (the 2^7 table, where "_", the
underscore or "unit separator", is at number 95
counting from 0; see ascii(7)).
So there must be some fishy semantics going on.
Perhaps one needs to do a special study of the
C preprocessor? And if so, are there other
conventions one should be aware of?
And just what kind of error is it we're
trying (succeeding) to avoid?
[1] http://user.it.uu.se/~embe8573/emacs-init/ide/c-and-cpp.el
--
underground experts united
http://user.it.uu.se/~embe8573
next prev parent reply other threads:[~2018-04-14 23:54 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 ` insert-header-preprocessor-definition Ben Bacarisse
2018-04-11 22:07 ` insert-header-preprocessor-definition Emanuel Berg
2018-04-14 23:54 ` Emanuel Berg [this message]
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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