;;; Cursors for traversal of list and vector elements with offsets.
-(defvar edebug-dotted-spec nil)
+(defvar edebug-dotted-spec nil
+ "Set to t when matching after the dot in a dotted spec list.")
(defun edebug-new-cursor (expressions offsets)
;; Return a new cursor for EXPRESSIONS with OFFSETS.
;;; Matching of specs.
-(defvar edebug-after-dotted-spec nil)
-
(defvar edebug-matching-depth 0) ;; initial value
(let ((edebug-dotted-spec t));; Containing spec list was dotted.
(edebug-match-specs cursor (list specs) remainder-handler)))
- ;; Is the form dotted?
- ((not (listp (edebug-cursor-expressions cursor)));; allow nil
+ ;; The reason for processing here &optional, &rest, and vectors
+ ;; which might contain them even when the form is dotted is to
+ ;; allow them to match nothing, so we can advance to the dotted
+ ;; part of the spec.
+ ((or (listp (edebug-cursor-expressions cursor))
+ (vectorp (car specs))
+ (memq (car specs) '(&optional &rest))) ; Process normally.
+ ;; (message "%scursor=%s specs=%s"
+ ;; (make-string edebug-matching-depth ?|) cursor (car specs))
+ (let* ((spec (car specs))
+ (rest)
+ (first-char (and (symbolp spec) (aref (symbol-name spec) 0)))
+ (match (cond
+ ((eq ?& first-char);; "&" symbols take all following specs.
+ (funcall (get-edebug-spec spec) cursor (cdr specs)))
+ ((eq ?: first-char);; ":" symbols take one following spec.
+ (setq rest (cdr (cdr specs)))
+ (funcall (get-edebug-spec spec) cursor (car (cdr specs))))
+ (t;; Any other normal spec.
+ (setq rest (cdr specs))
+ (edebug-match-one-spec cursor spec)))))
+ ;; The first match result may not be a list, which can happen
+ ;; when matching the tail of a dotted list. In that case
+ ;; there is no remainder.
+ (if (listp match)
+ (nconc match
+ (funcall remainder-handler cursor rest remainder-handler))
+ match)))
+
+ ;; Must be a dotted form, with no remaining &rest or &optional specs to
+ ;; match.
+ (t
(if (not edebug-dotted-spec)
(edebug-no-match cursor "Dotted spec required."))
;; Cancel dotted spec and dotted form.
(let ((edebug-dotted-spec)
- (this-form (edebug-cursor-expressions cursor))
- (this-offset (edebug-cursor-offsets cursor)))
- ;; Wrap the form in a list, (by changing the cursor??)...
+ (this-form (edebug-cursor-expressions cursor))
+ (this-offset (edebug-cursor-offsets cursor)))
+ ;; Wrap the form in a list, by changing the cursor.
(edebug-set-cursor cursor (list this-form) this-offset)
- ;; and process normally, then unwrap the result.
- (car (edebug-match-specs cursor specs remainder-handler))))
-
- (t;; Process normally.
- (let* ((spec (car specs))
- (rest)
- (first-char (and (symbolp spec) (aref (symbol-name spec) 0))))
- ;;(message "spec = %s first char = %s" spec first-char) (sit-for 1)
- (nconc
- (cond
- ((eq ?& first-char);; "&" symbols take all following specs.
- (funcall (get-edebug-spec spec) cursor (cdr specs)))
- ((eq ?: first-char);; ":" symbols take one following spec.
- (setq rest (cdr (cdr specs)))
- (funcall (get-edebug-spec spec) cursor (car (cdr specs))))
- (t;; Any other normal spec.
- (setq rest (cdr specs))
- (edebug-match-one-spec cursor spec)))
- (funcall remainder-handler cursor rest remainder-handler)))))))
-
+ ;; Process normally, then unwrap the result.
+ (car (edebug-match-specs cursor specs remainder-handler)))))))
;; Define specs for all the symbol specs with functions used to process them.
;; Perhaps we shouldn't be doing this with edebug-form-specs since the
"@g" (should (equal edebug-tests-@-result
'(#("abcd" 1 3 (face italic)) 511))))))
+(ert-deftest edebug-tests-dotted-forms ()
+ "Edebug can instrument code matching the tail of a dotted spec (Bug#6415)."
+ (edebug-tests-with-normal-env
+ (edebug-tests-setup-@ "use-destructuring-bind" nil t)
+ (edebug-tests-run-kbd-macro
+ "@ SPC SPC SPC SPC SPC SPC"
+ (edebug-tests-should-be-at "use-destructuring-bind" "x")
+ (edebug-tests-should-match-result-in-messages "2 (#o2, #x2, ?\\C-b)")
+ "SPC"
+ (edebug-tests-should-be-at "use-destructuring-bind" "y")
+ (edebug-tests-should-match-result-in-messages "3 (#o3, #x3, ?\\C-c)")
+ "g"
+ (should (equal edebug-tests-@-result 5)))))
+
(provide 'edebug-tests)
;;; edebug-tests.el ends here