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Groups > gnu.bash.bug > #15395 > unrolled thread
| Started by | Dmitry Goncharov <dgoncharov@users.sf.net> |
|---|---|
| First post | 2019-09-21 14:55 -0400 |
| Last post | 2019-09-21 14:55 -0400 |
| Articles | 1 — 1 participant |
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Re: Incorrect example for `[[` command. Dmitry Goncharov <dgoncharov@users.sf.net> - 2019-09-21 14:55 -0400
| From | Dmitry Goncharov <dgoncharov@users.sf.net> |
|---|---|
| Date | 2019-09-21 14:55 -0400 |
| Subject | Re: Incorrect example for `[[` command. |
| Message-ID | <mailman.741.1569092119.2190.bug-bash@gnu.org> |
On Sat, Sep 21, 2019 at 12:34:39PM +0300, Ilkka Virta wrote: > [[: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 This is unfortunate. *? and +? are widely used not greedy regexes. regards, Dmitry
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