From: Stefan Monnier <monnier@iro.umontreal.ca>
To: help-gnu-emacs@gnu.org
Subject: Re: incorrect warning when byte compiling?
Date: Mon, 25 Jun 2012 18:55:49 -0400 [thread overview]
Message-ID: <jwvtxxz9fek.fsf-monnier+gnu.emacs.help@gnu.org> (raw)
In-Reply-To: mailman.3395.1340564211.855.help-gnu-emacs@gnu.org
> Is this a bug/limitation in the Emacs byte compiler?
Bug, no, limitation, yes.
> It's easy enough to silence this warning (e.g., with (when (fboundp
> whitespace-mode) ...)), but I want to know why Emacs thinks this
> is a problem.
Doing "(eval-when-compile (require 'whitespace nil t))" and
then "(when (require 'whitespace nil t)" is very unusual so the
byte-compiler does not try to handle this kind of circumstance cleverly.
Really, (eval-when-compile (require 'whitespace nil t)) is meant for the
case where `whitespace' defines functions or macros which will be called
during byte-compilation; it's not meant to silence compiler warnings.
Rather than fboundp, you can also use `declare-function', whose purpose
is specifically to silence compiler warnings.
Stefan
next prev parent reply other threads:[~2012-06-25 22:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.3395.1340564211.855.help-gnu-emacs@gnu.org>
2012-06-25 7:20 ` incorrect warning when byte compiling? John Wiegley
2012-06-25 22:55 ` Stefan Monnier [this message]
2012-06-24 18:54 Richard Hansen
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