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Re: Why a defmacro that calls a defun?


From: Eric Abrahamsen
Subject: Re: Why a defmacro that calls a defun?
Date: Tue, 03 Oct 2017 11:20:56 -0700
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.60 (gnu/linux)

Barry Margolin <address@hidden> writes:

> In article <address@hidden>,
>  Eric Abrahamsen <address@hidden> 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.




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