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Re: 23.0.50; savehist save invalid syntax
From: |
Davis Herring |
Subject: |
Re: 23.0.50; savehist save invalid syntax |
Date: |
Wed, 5 Sep 2007 11:16:20 -0700 (PDT) |
User-agent: |
SquirrelMail/1.4.8-6.el3.2lanl |
> With this much complexity, my temptation would be to provide a
> print-readable function (or an optional argument to an existing
> printer)
> that signalled if it were asked to print something that has no read
> syntax.
>
> I wouldn't mind adding that feature if someone wants to do it.
> It should be controlled by a variable.
I've implemented that feature. I took Stefan's suggestion and made the
variable be a function that took over printing (or t for signaling as in
my original suggestion). The patch is attached; please bear with me as I
think it's my most complex foray into Emacs' C thus far and introduces a
new macro and such. It is, however, tested.
On a side note, I see that this is an extension of the variable
`print-readably' in XEmacs. It doesn't follow naming convention, but
perhaps my new variable `print-unreadable-function' should be named or
aliased to `print-readably' for compatibility.
Meanwhile, savehist needs to use this. It actually already has a hack in
it that uses `prin1' and `read' (or `print-readably' on XEmacs) to detect
unreadability; one could certainly use this instead of the new printing
feature. But for cleanliness and completeness, I removed that trick and
replaced it with handlers for the unreadable signals that, now, both
varities of Emacs will generate. (Of course, I also actually implemented
the code to skip unprintable history elements, instead of skipping the
entire history or so.) This second patch is completely untested because
I'm unfamiliar with savehist.
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.
print-unreadable.patch
Description: Binary data
savehist-unreadable.patch
Description: Binary data
- 23.0.50; savehist save invalid syntax, Leo, 2007/09/02
- RE: 23.0.50; savehist save invalid syntax, Drew Adams, 2007/09/02
- Re: 23.0.50; savehist save invalid syntax, Richard Stallman, 2007/09/02
- Re: 23.0.50; savehist save invalid syntax, Davis Herring, 2007/09/04
- Re: 23.0.50; savehist save invalid syntax, Stefan Monnier, 2007/09/04
- Re: 23.0.50; savehist save invalid syntax, Richard Stallman, 2007/09/05
- Re: 23.0.50; savehist save invalid syntax,
Davis Herring <=
- Re: 23.0.50; savehist save invalid syntax, Richard Stallman, 2007/09/06
- RE: 23.0.50; savehist save invalid syntax, Drew Adams, 2007/09/09
- Re: 23.0.50; savehist save invalid syntax, Andreas Schwab, 2007/09/09
- RE: 23.0.50; savehist save invalid syntax, Drew Adams, 2007/09/09
- RE: 23.0.50; savehist save invalid syntax, Drew Adams, 2007/09/09
- RE: 23.0.50; savehist save invalid syntax, Davis Herring, 2007/09/10
- RE: 23.0.50; savehist save invalid syntax, Drew Adams, 2007/09/10
- Re: 23.0.50; savehist save invalid syntax, Richard Stallman, 2007/09/10
- Re: 23.0.50; savehist save invalid syntax, Davis Herring, 2007/09/11
- RE: 23.0.50; savehist save invalid syntax, Davis Herring, 2007/09/10