[Emacs-diffs] emacs-24 r116993: Mention that overlay priority doesn't have to be nil or an integer.

[Eli Zaretskii]

------------------------------------------------------------
revno: 116993
revision-id: address@hidden
parent: address@hidden
fixes bug: http://debbugs.gnu.org/17234
committer: Eli Zaretskii <address@hidden>
branch nick: emacs-24
timestamp: Mon 2014-04-21 16:46:25 +0300
message:
  Mention that overlay priority doesn't have to be nil or an integer.
modified:
  etc/NEWS                       news-20100311060928-aoit31wvzf25yr1z-1

=== modified file 'etc/NEWS'
--- a/etc/NEWS  2014-04-20 14:50:13 +0000
+++ b/etc/NEWS  2014-04-21 13:46:25 +0000
@@ -1218,6 +1218,15 @@
 ** The cars of the elements in `interpreter-mode-alist' are now
 treated as regexps rather than literal strings.
 
+---
+** Overlay priority does not have to be nil or a non-negative integer.
+Overlay priority can be other kinds of Lisp objects.  We didn't yet
+decide whether other types of values are stable enough, and therefore
+don't feel it's right to document them.  For now, don't assume in your
+code that the values of overlay priority can only be either nil or an
+integer, always test them with an appropriate predicate to be one or
+the other.
+
 
 * Lisp Changes in Emacs 24.4