On 21.9. 03:12, hk wrote:
Thanks for the reply. I was wrong in my report. It does match values like aab and aaaaaab in its original form.
In some systems, yes. (It does that on my Debian, but doesn't work at all on my Mac.)
It is syntatically correct as a regular expression.
[[:space:]]*?(a)b isn't a well-defined POSIX ERE: 9.4.6 EREs Matching Multiple Characters The behavior of multiple adjacent duplication symbols ( '+', '*', '?', and intervals) produces undefined results. https://pubs.opengroup.org/onlinepubs/9699919799.2018edition/basedefs/V1_chap09.html -- Ilkka Virta / itvi...@iki.fi
