From: Barry Margolin <barmar@alum.mit.edu>
To: help-gnu-emacs@gnu.org
Subject: Re: Why a defmacro that calls a defun?
Date: Tue, 03 Oct 2017 13:24:08 -0400 [thread overview]
Message-ID: <barmar-D4F73E.13233803102017@reader.eternal-september.org> (raw)
In-Reply-To: mailman.668.1506986797.27995.help-gnu-emacs@gnu.org
In article <mailman.668.1506986797.27995.help-gnu-emacs@gnu.org>,
Eric Abrahamsen <eric@ericabrahamsen.net> wrote:
> I'm poking through Gnus, and seeing a fair number of places with code
> that looks like this:
>
> (defmacro nnoo-define-skeleton (backend)
> `(eval-and-compile
> (nnoo-define-skeleton-1 ',backend)))
>
> (defun nnoo-define-skeleton-1 (backend)
> ...)
>
> What does this actually do? All I can see happening is that a quote mark
> is added before the BACKEND argument in the macro. What is happening
> here?
It just causes the function to be called at compile time as well as run
time, due to the use of eval-and-compile.
--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
next parent reply other threads:[~2017-10-03 17:24 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.668.1506986797.27995.help-gnu-emacs@gnu.org>
2017-10-03 17:24 ` Barry Margolin [this message]
2017-10-03 18:20 ` Why a defmacro that calls a defun? Eric Abrahamsen
2017-10-02 23:26 Eric Abrahamsen
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