From: Eric Abrahamsen <eric@ericabrahamsen.net>
To: help-gnu-emacs@gnu.org
Subject: Re: Why a defmacro that calls a defun?
Date: Tue, 03 Oct 2017 11:20:56 -0700 [thread overview]
Message-ID: <87shf0ay9j.fsf@ericabrahamsen.net> (raw)
In-Reply-To: barmar-D4F73E.13233803102017@reader.eternal-september.org
Barry Margolin <barmar@alum.mit.edu> writes:
> 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.
Huh, thanks for that. I guess it's obvious, but it was not clicking for me.
next prev parent reply other threads:[~2017-10-03 18:20 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 ` Why a defmacro that calls a defun? Barry Margolin
2017-10-03 18:20 ` Eric Abrahamsen [this message]
2017-10-02 23:26 Eric Abrahamsen
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