+ (let ((mark (gnus-summary-article-mark article)))
+ (unless (memq mark mark-cache-no)
+ (if (memq mark mark-cache-yes)
+ (push article list)
+ ;; else, we have to actually check the mark
+ (if (funcall mark-check
+ gnus-newsgroup-name
+ mark)
+ (progn
+ (push article list)
+ (push mark mark-cache-yes))
+ (push mark mark-cache-no))))))