Description

assignee = None
closed_at = None
created_at = <Date 2001-06-14.08:30:56.000>
labels = ['expert-regex', 'type-feature', 'library', '3.11']
title = 'SRE: Atomic Grouping (?>...) is not supported'
updated_at = <Date 2022-03-21.16:28:37.831>
user = 'https://bugs.python.org/effbot'

activity = <Date 2022-03-21.16:28:37.831>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)', 'Regular Expressions']
creation = <Date 2001-06-14.08:30:56.000>
creator = 'effbot'
dependencies = []
files = ['10646', '37182']
hgrepos = []
issue_num = 433030
keywords = ['patch']
message_count = 12.0
messages = ['53164', '63284', '63288', '64634', '64735', '65777', '68337', '113201', '114621', '231041', '231049', '415685']
nosy_count = 10.0
nosy_names = ['effbot', 'georg.brandl', 'terry.reedy', 'rsc', 'timehorse', 'ezio.melotti', 'mrabarnett', 'THRlWiTi', 'abacabadabacaba', 'serhiy.storchaka']
pr_nums = ['31982']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue433030'
versions = ['Python 3.11']

Activity

1. effbot commented on Jun 14, 2001

   

   effbotmannequin

   on Jun 14, 2001

   MannequinAuthor

   More actions

   from the jeffrey friedl report:

   (?>...) is not supported

   [this is a "stand-alone pattern". the engine has code
   for this, but the parser doesn't recognize this yet.
   shouldn't be too hard to fix; I just need a couple of
   good test cases before I start /F]
2. effbot

   self-assigned this

   on Jun 14, 2001
3. effbot

   added

   topic-regex

   type-featureA feature request or enhancementA feature request or enhancement

   on Jun 14, 2001
4. effbot

   self-assigned this

   on Jun 14, 2001
5. effbot

   added

   topic-regex

   type-featureA feature request or enhancementA feature request or enhancement

   on Jun 14, 2001
6. akuchling commented on Mar 5, 2008

   

   akuchling

   on Mar 5, 2008

   Contributor

   More actions

   Also referred to as an atomic group: see
   http://www.regular-expressions.info/atomic.html for a discussion.

   Fredrik, when you say "the engine has code for this", what do you mean?
7. akuchling commented on Mar 5, 2008

   

   akuchling

   on Mar 5, 2008

   Contributor

   More actions

   There's also an alternate syntax for this, called possessive
   quantifiers: a*+, a++, a{m,n}+.
8. timehorse commented on Mar 28, 2008

   

   timehorsemannequin

   on Mar 28, 2008

   Mannequin

   More actions

   Fredrik,

   If you're still listening, I am gonna try and tackle this one but I
   would like to know why you or the famous Jeffrey of the Regexp world
   claims that there is already code in the Regexp Engine for Atomic
   Grouping? Adding a hook for (?>...) should be trivial but I don't wanna
   re-invent the wheel if the proper stack-unwind code already exists.
   Thanks. Of course, Andrew (a.k.a. A.M. Kuchling) already asked this
   question and you did not answer it, so I guess you're not reading this,
   but if you are, please respond. Thanks!
9. timehorse

   changed the title [-]SRE: (?>...) is not supported[/-] [+]SRE: Atomic Grouping (?>...) is not supported[/+] on Mar 28, 2008
10. timehorse

    changed the title [-]SRE: (?>...) is not supported[/-] [+]SRE: Atomic Grouping (?>...) is not supported[/+] on Mar 28, 2008
11. timehorse commented on Mar 29, 2008

    

    timehorsemannequin

    on Mar 29, 2008

    Mannequin

    More actions

    I'm digging into the sre_parse.py at the moment and this I have all the
    changes I need for that now. The rest of the changes I believe are in
    either sre_compile.py or more likely directly in _sre.c, so I will
    examine those files next. I am attaching a single diff for
    expedience. This is not an official patch, just a sample to see the
    progress I am making. I forgot the correct format for patch files but
    I promise to get it right when I have made more progress.
12. timehorse

    added

    stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

    on Mar 29, 2008
13. 4 remaining items
14. birkenfeld

    closed this as completedon Aug 22, 2010
15. birkenfeld

    closed this as completedon Aug 22, 2010
16. serhiy-storchaka commented on Nov 11, 2014

    

    serhiy-storchaka

    on Nov 11, 2014

    Member

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    Some unrelated to the topic changes from the patch are committed in 30a6c74ad87f.
17. serhiy-storchaka commented on Nov 11, 2014

    

    serhiy-storchaka

    on Nov 11, 2014

    Member

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    Reopened because definitely regex will be not adopted in 3.5.

    Here is updated to 3.5 Jeffrey's patch.
18. serhiy-storchaka

    reopened this on Nov 11, 2014
19. serhiy-storchaka

    reopened this on Nov 11, 2014
20. rhettinger

    unassigned

    effbot

    on Mar 18, 2022
21. AlexWaygood

    added

    3.11only security fixesonly security fixes

    on Mar 19, 2022
22. serhiy-storchaka commented on Mar 21, 2022

    

    serhiy-storchaka

    on Mar 21, 2022

    Member

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    New changeset 345b390 by Serhiy Storchaka in branch 'main':
    bpo-433030: Add support of atomic grouping in regular expressions (GH-31982)
    345b390
23. ezio-melotti

    transferred this issue fromon Apr 9, 2022
24. hugovk commented on Apr 11, 2022

    

    hugovk

    on Apr 11, 2022

    Member

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    Closing because GH-31982 has been merged.

    Reacted by Ilyas Bakirov (aka eRIC)
25. hugovk

    closed this as completedon Apr 11, 2022
26. gpshead commented on Jul 26, 2023

    

    gpshead

    on Jul 26, 2023

    Member

    More actions

    This feature addition led to #106052

Issue actions