(setq safe-pos-list (cdr safe-pos-list)))
(unless (setq safe-pos (car-safe safe-pos-list))
(setq safe-pos (max (or (c-safe-position
- (point) (or c-state-cache
- (c-parse-state)))
+ (point) (c-parse-state))
0)
(point-min))
safe-pos-list (list safe-pos)))
Note that this function might do hidden buffer changes. See the
comment at the start of cc-engine.el for more info."
- (let ((start (point))
- state-2
- ;; A list of syntactically relevant positions in descending
- ;; order. It's used to avoid scanning repeatedly over
- ;; potentially large regions with `parse-partial-sexp' to verify
- ;; each position. Used in `c-ssb-lit-begin'
- safe-pos-list
- ;; The result from `c-beginning-of-macro' at the start position or the
- ;; start position itself if it isn't within a macro. Evaluated on
- ;; demand.
- start-macro-beg
- ;; The earliest position after the current one with the same paren
- ;; level. Used only when `paren-level' is set.
- lit-beg
- (paren-level-pos (point)))
-
- (while
- (progn
- ;; The next loop "tries" to find the end point each time round,
- ;; loops when it hasn't succeeded.
- (while
- (and
- (let ((pos (point)))
- (while (and
- (< (skip-chars-backward skip-chars limit) 0)
- ;; Don't stop inside a literal.
- (when (setq lit-beg (c-ssb-lit-begin))
- (goto-char lit-beg)
- t)))
- (< (point) pos))
+ (c-self-bind-state-cache
+ (let ((start (point))
+ state-2
+ ;; A list of syntactically relevant positions in descending
+ ;; order. It's used to avoid scanning repeatedly over
+ ;; potentially large regions with `parse-partial-sexp' to verify
+ ;; each position. Used in `c-ssb-lit-begin'
+ safe-pos-list
+ ;; The result from `c-beginning-of-macro' at the start position or the
+ ;; start position itself if it isn't within a macro. Evaluated on
+ ;; demand.
+ start-macro-beg
+ ;; The earliest position after the current one with the same paren
+ ;; level. Used only when `paren-level' is set.
+ lit-beg
+ (paren-level-pos (point)))
+
+ (while
+ (progn
+ ;; The next loop "tries" to find the end point each time round,
+ ;; loops when it hasn't succeeded.
+ (while
+ (and
+ (let ((pos (point)))
+ (while (and
+ (< (skip-chars-backward skip-chars limit) 0)
+ ;; Don't stop inside a literal.
+ (when (setq lit-beg (c-ssb-lit-begin))
+ (goto-char lit-beg)
+ t)))
+ (< (point) pos))
+
+ (let ((pos (point)) state-2 pps-end-pos)
- (let ((pos (point)) state-2 pps-end-pos)
+ (cond
+ ((and paren-level
+ (save-excursion
+ (setq state-2 (parse-partial-sexp
+ pos paren-level-pos -1)
+ pps-end-pos (point))
+ (/= (car state-2) 0)))
+ ;; Not at the right level.
+
+ (if (and (< (car state-2) 0)
+ ;; We stop above if we go out of a paren.
+ ;; Now check whether it precedes or is
+ ;; nested in the starting sexp.
+ (save-excursion
+ (setq state-2
+ (parse-partial-sexp
+ pps-end-pos paren-level-pos
+ nil nil state-2))
+ (< (car state-2) 0)))
+
+ ;; We've stopped short of the starting position
+ ;; so the hit was inside a nested list. Go up
+ ;; until we are at the right level.
+ (condition-case nil
+ (progn
+ (goto-char (scan-lists pos -1
+ (- (car state-2))))
+ (setq paren-level-pos (point))
+ (if (and limit (>= limit paren-level-pos))
+ (progn
+ (goto-char limit)
+ nil)
+ t))
+ (error
+ (goto-char (or limit (point-min)))
+ nil))
+
+ ;; The hit was outside the list at the start
+ ;; position. Go to the start of the list and exit.
+ (goto-char (1+ (elt state-2 1)))
+ nil))
+
+ ((c-beginning-of-macro limit)
+ ;; Inside a macro.
+ (if (< (point)
+ (or start-macro-beg
+ (setq start-macro-beg
+ (save-excursion
+ (goto-char start)
+ (c-beginning-of-macro limit)
+ (point)))))
+ t
+
+ ;; It's inside the same macro we started in so it's
+ ;; a relevant match.
+ (goto-char pos)
+ nil))))))
- (cond
- ((and paren-level
- (save-excursion
- (setq state-2 (parse-partial-sexp
- pos paren-level-pos -1)
- pps-end-pos (point))
- (/= (car state-2) 0)))
- ;; Not at the right level.
-
- (if (and (< (car state-2) 0)
- ;; We stop above if we go out of a paren.
- ;; Now check whether it precedes or is
- ;; nested in the starting sexp.
- (save-excursion
- (setq state-2
- (parse-partial-sexp
- pps-end-pos paren-level-pos
- nil nil state-2))
- (< (car state-2) 0)))
-
- ;; We've stopped short of the starting position
- ;; so the hit was inside a nested list. Go up
- ;; until we are at the right level.
- (condition-case nil
- (progn
- (goto-char (scan-lists pos -1
- (- (car state-2))))
- (setq paren-level-pos (point))
- (if (and limit (>= limit paren-level-pos))
- (progn
- (goto-char limit)
- nil)
- t))
- (error
- (goto-char (or limit (point-min)))
- nil))
-
- ;; The hit was outside the list at the start
- ;; position. Go to the start of the list and exit.
- (goto-char (1+ (elt state-2 1)))
- nil))
-
- ((c-beginning-of-macro limit)
- ;; Inside a macro.
- (if (< (point)
- (or start-macro-beg
- (setq start-macro-beg
- (save-excursion
- (goto-char start)
- (c-beginning-of-macro limit)
- (point)))))
- t
-
- ;; It's inside the same macro we started in so it's
- ;; a relevant match.
- (goto-char pos)
- nil))))))
-
- (> (point)
- (progn
- ;; Skip syntactic ws afterwards so that we don't stop at the
- ;; end of a comment if `skip-chars' is something like "^/".
- (c-backward-syntactic-ws)
- (point)))))
+ (> (point)
+ (progn
+ ;; Skip syntactic ws afterwards so that we don't stop at the
+ ;; end of a comment if `skip-chars' is something like "^/".
+ (c-backward-syntactic-ws)
+ (point)))))
- ;; We might want to extend this with more useful return values in
- ;; the future.
- (/= (point) start)))
+ ;; We might want to extend this with more useful return values in
+ ;; the future.
+ (/= (point) start))))
;; The following is an alternative implementation of
;; `c-syntactic-skip-backward' that uses backward movement to keep