Re: irregular expressions, syntax complexity

From	arnold@freefriends.org (Aharon Robbins)
Newsgroups	comp.compilers
Subject	Re: irregular expressions, syntax complexity
Date	2023-02-22 08:53 +0000
Organization	non
Message-ID	<23-02-060@comp.compilers> (permalink)
References	<AQHZRT1Nf7Ln0mpyG0extuZP9rnVPQ==> <23-02-052@comp.compilers> <23-02-053@comp.compilers> <23-02-055@comp.compilers>

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In article <23-02-055@comp.compilers>,
Anton Ertl <anton@mips.complang.tuwien.ac.at> wrote:
>Regular expression syntax is missing an operator that signifies the
>intersection of the sets recognized by the operand regexps.  Let's
>call this operator "&". ....
>
>Has anybody implemented such an operator at all?

Doug McIlroy did, if I understand things correctly. See
https://github.com/arnoldrobbins/mcilroy-regex/blob/master/README
for more info.

Arnold

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syntax complexity gah4 <gah4@u.washington.edu> - 2023-02-15 15:08 -0800
  Re: syntax complexity Thomas Koenig <tkoenig@netcologne.de> - 2023-02-16 06:32 +0000
  Re: syntax complexity Hans-Peter Diettrich <DrDiettrich1@netscape.net> - 2023-02-16 12:03 +0100
    Re: syntax complexity gah4 <gah4@u.washington.edu> - 2023-02-16 11:33 -0800
      Re: syntax complexity gah4 <gah4@u.washington.edu> - 2023-02-16 16:08 -0800
      Re: syntax complexity Roger L Costello <costello@mitre.org> - 2023-02-20 15:09 +0000
        Re: syntax complexity gah4 <gah4@u.washington.edu> - 2023-02-20 09:57 -0800
          Re: syntax complexity anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2023-02-21 08:14 +0000
            Re: syntax complexity anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2023-02-21 18:39 +0000
              Re: ireegular expressions, syntax complexity anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2023-02-22 10:55 +0000
            Re: irregular expressions, syntax complexity arnold@freefriends.org (Aharon Robbins) - 2023-02-22 08:53 +0000
            Re: irregular expressions, syntax complexity Kaz Kylheku <864-117-4973@kylheku.com> - 2023-02-23 00:34 +0000
        Re: syntax complexity George Neuner <gneuner2@comcast.net> - 2023-02-20 13:49 -0500
      syntax complexity Christopher F Clark <christopher.f.clark@compiler-resources.com> - 2023-02-21 20:54 +0200

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