Commit 8c2e721a authored by Juri Linkov's avatar Juri Linkov
Browse files

(match-substitute-replacement): New function.

parent 18d8cb81
......@@ -2709,6 +2709,24 @@ STRING should be given if the last search was by `string-match' on STRING."
(buffer-substring-no-properties (match-beginning num)
(match-end num)))))
(defun match-substitute-replacement (replacement
&optional fixedcase literal string subexp)
"Return REPLACEMENT as it will be inserted by `replace-match'.
In other words, all back-references in the form `\\&' and `\\N'
are substituted with actual strings matched by the last search.
Optional FIXEDCASE, LITERAL, STRING and SUBEXP have the same
meaning as for `replace-match'."
(let ((match (match-string 0 string)))
(set-match-data (mapcar (lambda (x)
(if (numberp x)
(- x (match-beginning 0))
(match-data t)))
(replace-match replacement fixedcase literal match subexp))))
(defun looking-back (regexp &optional limit greedy)
"Return non-nil if text before point matches regular expression REGEXP.
Like `looking-at' except matches before point, and is slower.
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