From: "Davis Herring" <herring@lanl.gov>
To: "Stefan Monnier" <monnier@iro.umontreal.ca>
Cc: Chong Yidong <cyd@stupidchicken.com>,
MON KEY <monkey@sandpframing.com>,
emacs-devel@gnu.org
Subject: Re: with a fresh emacs "(buffer-local-value fundamental-mode (current-buffer))" error.
Date: Thu, 16 Apr 2009 14:29:02 -0700 (PDT) [thread overview]
Message-ID: <34120.128.165.123.18.1239917342.squirrel@webmail.lanl.gov> (raw)
In-Reply-To: <jwv7i1s40uk.fsf-monnier+emacs@gnu.org>
>> This should be (bound-and-true-p longlines-mode), because the
>> bound-and-true-p macro treats its VAR argument like setq; it is a macro,
>> not an ordinary Lisp function. Its docstring needs to be
>> corrected---I'll do this once I when I get the chance.
>
> It's too bad: it should have been a function, but it's a bit late to fix
> it now.
My apologies for, in a message meant to educate about the vagaries of
quoting, not noticing that it was a macro. On the subject of having it be
a function, it wouldn't be too horrible to provide a function also: I
would suggest the name `symbol-value-safe' (in line with `car-safe'). I
have this function defined as
(defun symbol-value-safe (symbol &optional def)
"Return SYMBOL's value, or DEF if that is void."
(if (boundp symbol) (symbol-value symbol) def))
One use of the default is for cross-version compatibility:
(symbol-value-safe 'eval-expression-print-length 12) ; for Emacs 20
Davis
--
This product is sold by volume, not by mass. If it appears too dense or
too sparse, it is because mass-energy conversion has occurred during
shipping.
prev parent reply other threads:[~2009-04-16 21:29 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-08 21:58 with a fresh emacs "(buffer-local-value fundamental-mode (current-buffer))" error MON KEY
2009-04-08 22:15 ` Jason Rumney
2009-04-09 2:22 ` MON KEY
2009-04-09 5:12 ` Kevin Rodgers
2009-04-08 22:32 ` Davis Herring
[not found] ` <d2afcfda0904081931n1f0d48fbo1253c6af08cd4bbc@mail.gmail.com>
2009-04-09 15:26 ` Davis Herring
[not found] ` <d2afcfda0904091341j6b1194a1ifb522b99535139f9@mail.gmail.com>
2009-04-09 22:42 ` Davis Herring
2009-04-10 3:12 ` MON KEY
2009-04-16 21:49 ` Davis Herring
2009-04-10 16:53 ` MON KEY
2009-04-10 17:38 ` Chong Yidong
2009-04-10 22:10 ` Stefan Monnier
2009-04-16 21:29 ` Davis Herring [this message]
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