From: Tassilo Horn <tsdh@gnu.org>
To: emacs-devel@gnu.org
Subject: Error in post-command-hook (completion-in-region--postch): (wrong-type-argument stringp nil)
Date: Fri, 24 Aug 2012 10:25:37 +0200 [thread overview]
Message-ID: <87393cd7cu.fsf@thinkpad.tsdh.de> (raw)
Hi all,
I'm writing a completion at point function for nREPL (which is about the
same as SLIME/Swank is for Common Lisp). However, if my function is in
`completion-at-point-functions' I frequently get the error in the
subject, and as a annoying result `completion-in-region-mode' isn't
toggled off anymore.
I've read the docs about completion at point several times, and my
function looks good to me. It'll always return
(START END (LIST-OF-STRINGS))
with valid positions and the completions really being strings, or nil if
there's no possible completion.
--8<---------------cut here---------------start------------->8---
(defun nrepl-complete-at-point ()
(interactive)
(let ((sap (symbol-at-point)))
(when (and sap (not (in-string-p)))
(nrepl-send-string "(require 'complete.core)" "user" 'identity)
(let ((form (format "(complete.core/completions \"%s\" *ns*)" sap))
(bounds (bounds-of-thing-at-point 'symbol)))
(let ((completions (car (read-from-string
(plist-get (nrepl-send-string-sync form nrepl-buffer-ns)
:value)))))
(when completions
;; TODO: Remove me again!
(assert (null (remove-if 'stringp completions)))
(list (car bounds) (cdr bounds) completions)))))))
--8<---------------cut here---------------end--------------->8---
Looking at the definition of `completion-in-region--postch' the only
place where the error might be triggered is in the
(funcall completion-in-region-mode--predicate)
line. The value of that is
--8<---------------cut here---------------start------------->8---
completion-in-region-mode--predicate is a variable defined in `minibuffer.el'.
Its value is #[0 "\301 \242\300=\207"
[9284 nrepl-complete-at-point]
2 "\n\n(fn)"]
--8<---------------cut here---------------end--------------->8---
There are no other function in `completion-at-point-functions'.
I'm happy for any pointers!
Bye,
Tassilo
next reply other threads:[~2012-08-24 8:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-24 8:25 Tassilo Horn [this message]
2012-08-24 9:44 ` Error in post-command-hook (completion-in-region--postch): (wrong-type-argument stringp nil) Thien-Thi Nguyen
2012-08-24 11:23 ` Tassilo Horn
2012-08-24 13:07 ` Thien-Thi Nguyen
2012-08-24 16:23 ` Tassilo Horn
2012-08-24 16:58 ` Thien-Thi Nguyen
2012-08-24 18:12 ` Tassilo Horn
2012-08-24 15:46 ` Stefan Monnier
2012-08-24 18:20 ` Tassilo Horn
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