GNU bug report logs - #21072
24.5; inconsistent behaviour of `C-M-h (mark-defun)' in Emacs Lisp

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Message #257 received at 21072 <at> debbugs.gnu.org (full text, mbox):

From: Marcin Borkowski <mbork <at> mbork.pl>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 21072 <at> debbugs.gnu.org, Noam Postavsky <npostavs <at> users.sourceforge.net>
Subject: Re: bug#21072: Brave new mark-defun (and a testing tool)
Date: Wed, 03 May 2017 07:27:20 +0200

On 2017-04-30, at 18:10, Stefan Monnier <monnier <at> iro.umontreal.ca> wrote:

>> 2. I still don't fully get the `eval-and-compile' stuff.  What exactly
>> happens when the file is compiled?
>
> During compilation, (eval-and-compile E) will be treated (i.e. compiled)
> just like E, except that E is evaluated along the way (so the
> definitions present in E are available during compilation).
>
>> I understand that its forms are not evaluated.
>
> They are.  It's for `eval-when-compile` that they aren't.

Thanks for your answer, but I'm still not sure.  Are the tables below
right?

Running:

| form                            | evaled? | compiled? |
|---------------------------------+---------+-----------|
| (defun ...)                     | yes     | no        |
| (eval-when-compile (defun ...)) | no      | no        |
| (eval-and-compile (defun ...))  | yes     | no        |
| (defmacro ...)                  | yes     | no        |

Compilation:

| form                            | evaled? | compiled? |
|---------------------------------+---------+-----------|
| (defun ...)                     | no      | yes       |
| (eval-when-compile (defun ...)) | yes     | yes       |
| (eval-and-compile (defun ...))  | yes     | yes       |
| (defmacro ...)                  | yes     | yes       |

TIA,

--
Marcin Borkowski

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