forward-sexp and quote

[Pascal Bourguignon]

(forward-sexp 1) eats quotes and backquotes, but (forward-sexp -1) doesn't.

.'(a b c)  --(forward-sexp 1)--> '(a b c). --(forward-sexp -1)--> '.(a b c)

(dot showing the point).

The bug can be traced to scan-sexp which is a built-in.
(show (version))
==> "GNU Emacs 21.2.1 (i686-pc-linux-gnu, X toolkit)
 of 2002-10-26 on thalassa"


(progn
  (find-file "*bug*")
  (emacs-lisp-mode)
  (erase-buffer)
  (mapc (lambda (s)
          (let ((before (point))
                after)
            (goto-char (point-max))
            (insert "\n")
            (insert s)
            (goto-char before)
            (forward-sexp 1)
            (forward-sexp -1)
            (setq after (point))
            (goto-char (point-max))
            (insert (format "\nbefore=%S\nafter =%S\n\n" before after))))
        '("' (a b c)" "'(a b c)")))


' (a b c)
before=1
after =4


'(a b c)
before=31
after =32


-- 
__Pascal_Bourguignon__                   http://www.informatimago.com/
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