GNU bug report logs - #60450
30.0.50; Strange behavior of compiler macros in *scratch*

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From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 60450 <at> debbugs.gnu.org
Subject: bug#60450: 30.0.50; Strange behavior of compiler macros in *scratch*
Date: Sat, 18 May 2024 08:33:23 +0200

Stefan Monnier <monnier <at> iro.umontreal.ca> writes:

>> The doc string of cl-define-compiler-macro says
>>   "This is like ‘defmacro’, but macro expansion occurs only if the call to
>>  FUNC is compiled (i.e., not interpreted)."
>
> `cl-define-compiler-macro` is built on top of the "new" ELisp compiler
> macro feature.  I think that feature is documented vaguely (poorly?)
> enough that it does allow expansion (or not) for interpreted code.
>
>> C-j is bound to eval-print-last-sexp, which I wouldn't expect to compile
>> anything, and its doc string doesn't mention anything AFAICS.  Not sure if
>> that's a bug in the code or something missing in the docs.
>
> Trying to distinguish those calls to `macroexpand-all` which come from
> the compiler from those that come from elsewhere doesn't seem worth the
> trouble, so I'd rather consider it as a doc bug.
>
> The doc should also make it clear that contrary to `defmacro` there is
> no guarantee that it will be called (nor *when* it's called).

I don't think that this will be changed, so I'm closing this bug.

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