Re: Regular expression string searching & matching

Ben Hanson <jamin.hanson@googlemail.com>
Tue, 13 Mar 2018 14:23:40 -0700 (PDT)

          From comp.compilers
Related articles
[5 earlier articles]
Re: Regular expression string searching & matching jamin.hanson@googlemail.com (Ben Hanson) (2018-03-10)
Re: Regular expression string searching & matching jamin.hanson@googlemail.com (Ben Hanson) (2018-03-11)
Re: Regular expression string searching & matching clint.olsen@gmail.com (Clint O) (2018-03-12)
Re: Regular expression string searching & matching jamin.hanson@googlemail.com (Ben Hanson) (2018-03-12)
Re: Regular expression string searching & matching DrDiettrich1@netscape.net (Hans-Peter Diettrich) (2018-03-13)
Re: Regular expression string searching & matching jamin.hanson@googlemail.com (Ben Hanson) (2018-03-13)
Re: Regular expression string searching & matching jamin.hanson@googlemail.com (Ben Hanson) (2018-03-13)
Re: Regular expression string searching & matching clint.olsen@gmail.com (Clint O) (2018-03-17)
Re: Regular expression string searching & matching clint.olsen@gmail.com (Clint O) (2018-03-18)
Re: Regular expression string searching & matching clint.olsen@gmail.com (Clint O) (2018-03-20)
Re: Regular expression string searching & matching clint.olsen@gmail.com (Clint O) (2018-03-22)
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From: Ben Hanson <jamin.hanson@googlemail.com>
Newsgroups: comp.compilers
Date: Tue, 13 Mar 2018 14:23:40 -0700 (PDT)
Organization: Compilers Central
References: 18-03-016 18-03-032 18-03-034 18-03-035 18-03-041 18-03-050
Injection-Info: gal.iecc.com; posting-host="news.iecc.com:2001:470:1f07:1126:0:676f:7373:6970"; logging-data="81279"; mail-complaints-to="abuse@iecc.com"
Keywords: lex, DFA
Posted-Date: 13 Mar 2018 17:32:45 EDT

On Tuesday, 13 March 2018 19:33:53 UTC, Hans-Peter Diettrich wrote:
> > State: 0
> > [/] -> 1
> >
> > State: 1
> > [*] -> 2
> >
> > State: 2
> > [^*] -> 2
> > [*] -> 3
>
> I'm just curious about the notation.
> What happens if neither pattern matches?
> What's the purpose of [^*] in state 2, as opposed to state 1?


In state 2 you are either looping on [^*] (anything other than '*') or changing state to state 3 on '*'.


I'm not sure I understand your question.


Regards,


Ben

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