Groups > comp.compilers > #1990

Re: Regular expression string searching & matching

From	Ben Hanson <jamin.hanson@googlemail.com>
Newsgroups	comp.compilers
Subject	Re: Regular expression string searching & matching
Date	2018-03-11 13:52 -0700
Organization	Compilers Central
Message-ID	<18-03-041@comp.compilers> (permalink)
References	<18-03-016@comp.compilers> <18-03-032@comp.compilers> <18-03-034@comp.compilers> <18-03-035@comp.compilers>

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> /This/ actually worked for me (one character change):
>
> [/][*]([^*]|[*]+[^/])*[*]+[/]

Your modified regex produces the following state machine:

State: 0
  [/] -> 1

State: 1
  [*] -> 2

State: 2
  [^*] -> 2
  [*] -> 3

State: 3
  [^*/] -> 2
  [*] -> 4
  [/] -> 5

State: 4
  [^*/] -> 2
  [*] -> 4
  [/] -> 6

State: 5
  END STATE

State: 6
  END STATE
  [^*] -> 2
  [*] -> 3

Which will match

/***/a*/

in its entirety, when if should only match

/***/

Regards,

Ben
[Doesn't that depend on whether you interpret the END STATE in state 6 to stop even
if there's more input? -John]

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Thread

Regular expression string searching & matching Clint O <clint.olsen@gmail.com> - 2018-03-04 01:37 -0800
  Re: Regular expression string searching & matching Ben Hanson <jamin.hanson@googlemail.com> - 2018-03-07 11:53 -0800
    Re: Regular expression string searching & matching Ben Hanson <jamin.hanson@googlemail.com> - 2018-03-07 12:18 -0800
    Re: Regular expression string searching & matching Clint O <clint.olsen@gmail.com> - 2018-03-08 22:53 -0800
      Re: Regular expression string searching & matching Clint O <clint.olsen@gmail.com> - 2018-03-10 00:57 -0800
        Re: Regular expression string searching & matching Ben Hanson <jamin.hanson@googlemail.com> - 2018-03-11 13:52 -0700
          Re: Regular expression string searching & matching Clint O <clint.olsen@gmail.com> - 2018-03-12 14:00 -0700
            Re: Regular expression string searching & matching Ben Hanson <jamin.hanson@googlemail.com> - 2018-03-13 11:30 -0700
              Re: Regular expression string searching & matching Clint O <clint.olsen@gmail.com> - 2018-03-17 16:52 -0700
              Re: Regular expression string searching & matching Clint O <clint.olsen@gmail.com> - 2018-03-18 19:23 +0000
              Re: Regular expression string searching & matching Clint O <clint.olsen@gmail.com> - 2018-03-20 17:23 +0000
                Re: Regular expression string searching & matching Clint O <clint.olsen@gmail.com> - 2018-03-22 17:46 +0000
          Re: Regular expression string searching & matching Ben Hanson <jamin.hanson@googlemail.com> - 2018-03-12 15:46 -0700
          Re: Regular expression string searching & matching Hans-Peter Diettrich <DrDiettrich1@netscape.net> - 2018-03-13 10:53 +0100
            Re: Regular expression string searching & matching Ben Hanson <jamin.hanson@googlemail.com> - 2018-03-13 14:23 -0700
      Re: Regular expression string searching & matching Ben Hanson <jamin.hanson@googlemail.com> - 2018-03-10 03:17 -0800

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