* regexps that match and don't match
@ 2018-01-06 2:10 Emanuel Berg
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From: Emanuel Berg @ 2018-01-06 2:10 UTC (permalink / raw)
To: help-gnu-emacs
Did anyone think of doing something like this?
(defun re-match-white-black (string re-white re-black)
(let ((white (string-match re-white string))
(black (string-match re-black string)) )
(and white (not black)) ))
;; (re-match-white-black "aaab" ".*b" "z.*") ; t
;; (re-match-white-black "baab" ".*b" "z.*") ; t
;; (re-match-white-black "aaac" ".*b" "z.*") ; nil
;; (re-match-white-black "zaab" ".*b" "z.*") ; nil
;; (re-match-white-black "zaac" ".*b" "z.*") ; nil
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2018-01-06 2:10 regexps that match and don't match Emanuel Berg
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