Function: c-state-cache-lower-good-pos

c-state-cache-lower-good-pos is a byte-compiled function defined in cc-engine.el.gz.

Signature

(c-state-cache-lower-good-pos HERE POS STATE)

Source Code

;; Defined in /usr/src/emacs/lisp/progmodes/cc-engine.el.gz
(defun c-state-cache-lower-good-pos (here pos state)
  ;; Return a good pos (in the sense of `c-state-cache-good-pos') at the
  ;; lowest[*] position between POS and HERE which is syntactically equivalent
  ;; to HERE.  This position may be HERE itself.  POS is before HERE in the
  ;; buffer.
  ;; [*] We don't actually always determine this exact position, since this
  ;; would require a disproportionate amount of work, given that this function
  ;; deals only with a corner condition, and POS and HERE are typically on
  ;; adjacent lines.  We actually return either POS, when POS is a good
  ;; position, HERE otherwise.  Exceptionally, when POS is in a comment, but
  ;; HERE not, we can return the position of the end of the comment.
  (let (s)
    (save-excursion
      (goto-char pos)
      (when (nth 8 state)	; POS in a comment or string.  Move out of it.
	(setq s (parse-partial-sexp pos here nil nil state 'syntax-table))
	(when (< (point) here)
	  (setq pos (point)
		state s)))
      (if (eq (point) here)		; HERE is in the same literal as POS
	  pos
	(setq s (parse-partial-sexp pos here (1+ (car state)) nil state nil))
	(cond
	 ((> (car s) (car state))  ; Moved into a paren between POS and HERE
	  here)
	 ((not (eq (nth 6 s) (car state))) ; Moved out of a paren between POS
					; and HERE
	  here)
	 (t pos))))))