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(syntax-ppss-flush-cache): Fix corner boundary case.

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Suggested by Martin Rudalics <rudalics@gmx.at>.
This commit is contained in:
Stefan Monnier 2005-10-21 06:01:22 +00:00
parent 68f1aaeead
commit 889c5dad20
1 changed files with 9 additions and 5 deletions
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14
lisp/emacs-lisp/syntax.el
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@ -83,10 +83,14 @@ point (where the PPSS is equivalent to nil).")
(setq syntax-ppss-cache (cdr syntax-ppss-cache)))
;; Throw away `last' value if made invalid.
(when (< beg (or (car syntax-ppss-last) 0))
(if (< beg (or (car (nth 10 syntax-ppss-last))
(nth 9 syntax-ppss-last)
(nth 2 syntax-ppss-last)
0))
;; If syntax-begin-function jumped to BEG, then the old state at BEG can
;; depend on the text after BEG (which is presumably changed). So if
;; BEG=(car (nth 10 syntax-ppss-last)) don't reuse that data because the
;; assumed nil state at BEG may not be valid any more.
(if (<= beg (or (car (nth 10 syntax-ppss-last))
(nth 9 syntax-ppss-last)
(nth 2 syntax-ppss-last)
0))
(setq syntax-ppss-last nil)
(setcar syntax-ppss-last nil)))
;; Unregister if there's no cache left. Sadly this doesn't work
@ -293,5 +297,5 @@ Point is at POS when this function returns."
(provide 'syntax)
;;; arch-tag: 302f1eeb-e77c-4680-a8c5-c543e01161a5
;; arch-tag: 302f1eeb-e77c-4680-a8c5-c543e01161a5
;;; syntax.el ends here