From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Roland Winkler <roland.winkler@physik.uni-erlangen.de>
Cc: 5495@debbugs.gnu.org
Subject: bug#5495: 23.1.90; symbol completion fails
Date: Mon, 01 Feb 2010 10:16:20 -0500 [thread overview]
Message-ID: <jwvfx5ldm4r.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <878wbgfm6o.fsf@regnitz.physics.niu.edu> (Roland Winkler's message of "Fri, 29 Jan 2010 18:53:03 -0600")
> I am having trouble with symbol completion. The lisp manual says
> about `try-completion'
> The value of COLLECTION must be a list of strings or symbols,
> an alist, an obarray, ...
That's incorrect, a list of symbols is not supported (although it
somewhat works).
> So the following works well
> (try-completion "foo" '("bar" baz)) ; fine
> (try-completion "foo" '((bar) baz)) ; fine
> Yet the following example fails
> (try-completion "foo" '(bar baz)) ; fails
> because it tries to interpret (bar baz) as a call of function bar
> using arg baz.
Not, it interprets the whole (bar baz) as a function (without checking
whether the first symbol is indeed a lambda).
> Shouldn't the last example work, too? Or am I missing something?
It can be made to work, but then it will mysteriously break again when
the first symbol in the list happens to be a lambda.
> I thought I had used symbol completion before. But now I cannot get
> it to work anymore.
Use an alist with symbols as keys, or use an obarray. Otherwise pass
your list of symbols through (mapcar 'symbol-name ...) to turn it into a
list of strings.
Stefan
next prev parent reply other threads:[~2010-02-01 15:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-30 0:53 bug#5495: 23.1.90; symbol completion fails Roland Winkler
2010-02-01 15:16 ` Stefan Monnier [this message]
2010-02-01 16:06 ` Roland Winkler
2011-07-13 16:32 ` Lars Magne Ingebrigtsen
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