From: Henning Hraban Ramm <texml@fiee.net>
To: ntg-context@ntg.nl
Subject: [NTG-context] Re: regular expression as lua pattern
Date: Wed, 29 May 2024 13:00:38 +0200 [thread overview]
Message-ID: <cbf4ced0-47d7-43b5-a52e-08ea8a226d04@fiee.net> (raw)
In-Reply-To: <9c8e8aa9-faf1-4dc2-b476-32ba2dfc6140@xs4all.nl>
Am 28.05.24 um 20:06 schrieb Hans Hagen:
> On 5/28/2024 6:25 PM, Tomáš Hála wrote:
>> Hi Pablo,
>>
>> unfortunately, that it is not possible:
>>
>> http://lua-users.org/wiki/PatternsTutorial, section Limitations.
>
> \starttext
> \startTEXpage[pagestate=start, offset=1em]
> \startluacode
> local pat = (lpeg.Cmt(lpeg.P("this") + lpeg.P("that"),
> function(str,_,s)
> context(s)
> return #str
> end) + lpeg.P(1))^1
> lpeg.match(pat,"how about this being that")
>
> local pat = (lpeg.Cmt(lpeg.oneof({ "this", "that" }),
> function(str,_,s)
> context(s)
> return #str
> end) + lpeg.P(1))^1
> lpeg.match(pat,"how about this being that")
> \stopluacode
> \stopTEXpage
> \stoptext
See also Taco’s introduction to LPEG in
https://articles.contextgarden.net/journal/2019/77-98.pdf
Hraban
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next prev parent reply other threads:[~2024-05-29 11:09 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-28 16:12 [NTG-context] " Pablo Rodriguez via ntg-context
2024-05-28 16:25 ` [NTG-context] " Tomáš Hála
2024-05-28 16:40 ` Pablo Rodriguez via ntg-context
2024-05-28 18:06 ` Hans Hagen
2024-05-29 11:00 ` Henning Hraban Ramm [this message]
2024-05-29 15:16 ` Pablo Rodriguez via ntg-context
2024-05-29 15:14 ` Pablo Rodriguez via ntg-context
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