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why is this regexp invalid: "\\(?1:\\)"
From: |
Ilya Shlyakhter |
Subject: |
why is this regexp invalid: "\\(?1:\\)" |
Date: |
Wed, 1 Sep 2010 15:40:00 -0400 |
dear emacs users,
can you help me understand why the following simple
expression gives an "Invalid regexp" error:
(string-match "\\(?1:\\)" "")
while removing the explicit group number gives no error:
(string-match "\\(?:\\)" "")
thanks,
ilya
- why is this regexp invalid: "\\(?1:\\)",
Ilya Shlyakhter <=