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From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Leo Liu <sdl.web@gmail.com>
Cc: 17498@debbugs.gnu.org
Subject: bug#17498: 24.4.50; This function has a compiler macro `yes--cmacro'.
Date: Thu, 15 May 2014 15:43:11 -0400	[thread overview]
Message-ID: <jwvbnuyltgs.fsf-monnier+emacsbugs@gnu.org> (raw)
In-Reply-To: <m3wqdnkrpt.fsf@gmail.com> (Leo Liu's message of "Thu, 15 May 2014 23:05:18 +0800")

> ;;;; BEGIN
> (defun yes ()
>   )
> (when nil
>   (cl-define-compiler-macro yes (&rest _)))
> ;;;; END

> ,----[ C-h f yes RET ]
> | yes is a Lisp function.
> | 
> | (yes)
> | 
> | This function has a compiler macro `yes--cmacro'.
> | 
> | Not documented.
> | 
> | [back]
> `----

> how is it possible? the compiler macro is defined at macro expansion
> time?

Pretty much, yes.  That's because the compiler macro is likely to be
needed/useful while compiling the rest of the file (before it gets
loaded).


        Stefan





  reply	other threads:[~2014-05-15 19:43 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-15 15:05 bug#17498: 24.4.50; This function has a compiler macro `yes--cmacro' Leo Liu
2014-05-15 19:43 ` Stefan Monnier [this message]
2014-05-16  1:28   ` Leo Liu
2014-05-16 12:24     ` Stefan Monnier
2014-05-16 18:25       ` Leo Liu
2014-05-16  8:59 ` Nicolas Richard
2014-05-16 18:28   ` Leo Liu

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