Serhiy Storchaka added the comment:
Thank you Antoine for your review.
To avoid discrepancy between re and regex (and other engines), I have committed
only a part of dynamic patch, without adding support of backreferences with
index over 99. It is unlikely to achieve this limit in hand written regular
expression, and in generated regular expression you can use named groups.
I found that backreference syntax is one of most discrepant thing in regular
expressions. There are at least 8 different variants (\N, \gN, \g<N>, \g{N},
\k<N>, \k'N', \k{N}, (?P=N)), and \g<N> in Perl have different meaning.
----------
resolution: -> fixed
stage: patch review -> resolved
status: open -> closed
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<http://bugs.python.org/issue22437>
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