From: Rocky Bernstein <rocky@gnu.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: emacs-devel@gnu.org
Subject: Re: relative load-file
Date: Wed, 11 Nov 2009 21:09:58 -0500 [thread overview]
Message-ID: <6cd6de210911111809j526ce8bfmcb5d57f907afff96@mail.gmail.com> (raw)
In-Reply-To: <jwvskckk0aj.fsf-monnier+emacs@gnu.org>
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On Wed, Nov 11, 2009 at 8:20 PM, Stefan Monnier <monnier@iro.umontreal.ca>wrote:
> > When load-file-name is nil, this uses the name of default directory of
> > current buffer. But that's not the same as the directory of the file
> > containing the load-relative function.
>
> > For example, I could have eval'd a buffer that did a load-relative of a
> file
> > in a different directory. Even without this, I can change the default
> > directory using the cd function. And changing the default directory never
> > changes the file location of the file issuing load-relative.
>
> > Any other thoughts?
>
> You obviously know enough about the problem to "fix it" further
>
Huh? If I knew a good solution to this short of changing the source code, I
*wouldn't* be asking.
(e.g. using buffer-file-name if you prefer it to default-directory).
>
What strikes me wrong about going in the direction of using buffer-file-name
or using buffers is that that we are introspecting about is the running
code.
I just took a look at the src/lread.c and although it is a somewhat bit
mysterious to me, from what I gather from readevalloop (and I could be *very
very* wrong here) is that when a file is read in, perhaps there *is
no*buffer created in the Emacs sense.
Avoiding buffer creation to read in a Lisp file make sense because one wants
reading Lisp code to be fast; furthemore there is no reason to store the
entire source contents as source contents after the file is read/eval'd.
(The vast majority of compilers don't save the source text).
I don't see any point in fixing it further, since there will always be
> corner cases where it doesn't do what the user intended.
>
A couple of things strike me as weird.
First, none of the examples I have given do I find really corner case.
These and many more have come up. (Recall that I have been using this mode
of working, and I gather from prior remarks you haven't.)
Second, a reason one might try to encapsulate this in a library is to be
able to handle as many of the corner cases as possible so run-of-the-mill
users need not have to be concerned - they can use the feature and have
confidence that it does the right thing.
Thanks for the help.
>
> Stefan
>
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next prev parent reply other threads:[~2009-11-12 2:09 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-11 17:01 relative load-file Rocky Bernstein
2009-11-11 18:35 ` Tassilo Horn
2009-11-11 19:26 ` Rocky Bernstein
2009-11-11 19:54 ` Tassilo Horn
2009-11-11 20:17 ` Stefan Monnier
2009-11-11 21:21 ` Rocky Bernstein
2009-11-11 23:06 ` Stefan Monnier
2009-11-12 1:01 ` Rocky Bernstein
2009-11-12 1:20 ` Stefan Monnier
2009-11-12 2:09 ` Rocky Bernstein [this message]
2009-11-12 4:22 ` Stefan Monnier
2009-11-12 13:01 ` Rocky Bernstein
2009-11-12 13:52 ` spedrosa
2009-11-12 14:11 ` Andreas Schwab
2009-11-12 15:34 ` Stefan Monnier
2009-11-13 4:34 ` Rocky Bernstein
2009-11-13 14:22 ` Stefan Monnier
2009-11-13 15:03 ` Rocky Bernstein
2009-11-13 16:17 ` Stefan Monnier
2009-11-13 16:39 ` Rocky Bernstein
2009-11-14 11:24 ` Richard Stallman
2009-11-14 15:44 ` Rocky Bernstein
2009-11-15 21:59 ` M Jared Finder
2009-11-18 3:20 ` Stefan Monnier
2009-11-15 22:38 ` Richard Stallman
2009-11-15 23:50 ` Rocky Bernstein
2009-11-18 12:10 ` Richard Stallman
2009-11-18 13:39 ` Rocky Bernstein
2009-11-21 22:52 ` Richard Stallman
2009-11-22 4:45 ` Rocky Bernstein
2009-11-23 2:29 ` Richard Stallman
2009-11-23 15:04 ` Rocky Bernstein
2009-11-24 14:11 ` Richard Stallman
-- strict thread matches above, loose matches on Subject: below --
2009-11-13 5:24 grischka
2009-11-13 5:59 ` Rocky Bernstein
2009-11-13 14:26 ` Stefan Monnier
2009-11-13 15:06 ` Rocky Bernstein
2009-11-09 14:54 rocky
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