From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Nathan Trapuzzano <nbtrap@nbtrap.com>
Cc: 15814@debbugs.gnu.org
Subject: bug#15814: 24.3.50; Signal error on malformed bindings in `cl-symbol-macrolet' (patch)
Date: Tue, 05 Nov 2013 22:20:37 -0500 [thread overview]
Message-ID: <jwvwqkmb4o5.fsf-monnier+emacsbugs@gnu.org> (raw)
In-Reply-To: <87a9himfvp.fsf@nbtrap.com> (Nathan Trapuzzano's message of "Tue, 05 Nov 2013 21:19:06 -0500")
>> Good idea. Could you try and use macroexp--warn-and-return instead, so
>> we get a file&line location when byte-compiling?
> I'm not certain what you mean here. You seem to agree that this is an
> error, but `macroexp--warn-and-return' doesn't signal an error--it just
> prints a warning. If we do something like this:
> (let ((msg (format "Malformed `cl-symbol-macrolet' binding: %S"
> (car bindings))))
> (macroexp--warn-and-return msg `(error "%s" ,msg)))
> we'll get a warning at compile time and an error at run time. Is this
> what you have in mind? Shouldn't we signal the error as early as
> possible? Perhaps there is some Emacs convention that I'm not aware of
> in this regard.
Signaling an error stops the whole compilation, so you only get one
error at a time. Better make it a warning, even though it is indeed
a programming error.
>> BTW, the same holds for the "let" sanity checks you added to cconv
>> (which should probably be moved to macroexp, now that I think about it,
>> so we can remove them from bytecomp.el).
> I don't understand this either. By "moved to macroexp", do you just
> mean that the sanity checks should be performed using
> macroexp--warn-and-return in the manner given above?
No, I mean that they should be performed in macroexp--expand-all rather
than in cconv, so they're performed regardless of lexical-binding
(currently they're done once in cconv.el and once in bytecomp.el).
Stefan
next prev parent reply other threads:[~2013-11-06 3:20 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-05 20:40 bug#15814: 24.3.50; Signal error on malformed bindings in `cl-symbol-macrolet' (patch) Nathan Trapuzzano
2013-11-06 0:46 ` Stefan Monnier
2013-11-06 2:19 ` Nathan Trapuzzano
2013-11-06 3:20 ` Stefan Monnier [this message]
2013-11-06 11:16 ` Nathan Trapuzzano
2013-11-06 13:45 ` Stefan Monnier
2013-11-07 1:14 ` Nathan Trapuzzano
2013-11-07 2:08 ` Stefan Monnier
2013-11-07 3:22 ` Nathan Trapuzzano
2013-11-07 4:38 ` Stefan Monnier
2013-11-07 19:51 ` Nathan Trapuzzano
2013-11-08 1:21 ` Stefan Monnier
2013-11-08 1:29 ` Nathan Trapuzzano
2013-11-08 3:02 ` Stefan Monnier
2013-11-08 11:40 ` Nathan Trapuzzano
2013-11-08 13:33 ` Stefan Monnier
2013-11-08 14:39 ` Nathan Trapuzzano
2013-11-08 19:06 ` Stefan Monnier
2013-11-09 2:06 ` Nathan Trapuzzano
2013-11-09 8:36 ` Andreas Schwab
2013-11-09 12:00 ` Nathan Trapuzzano
2013-11-11 4:55 ` Stefan Monnier
2013-11-07 7:08 ` bug#15814: bootstrap fails due to recent cl-symbol-macrolet patch Paul Eggert
2013-11-07 12:58 ` Nathan Trapuzzano
2013-11-07 19:46 ` Stefan Monnier
2013-11-07 21:03 ` Glenn Morris
2013-11-07 22:07 ` Glenn Morris
2013-11-08 1:34 ` Stefan Monnier
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