[NTG-context] Re: regular expression as lua pattern
On 5/29/24 13:00, Henning Hraban Ramm wrote: > [...] > See also Taco’s introduction to LPEG in > https://articles.contextgarden.net/journal/2019/77-98.pdf Many thanks for the reference, Hraban. I need to start digesting that to learn about LPEG. Pablo ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror) archive : https://github.com/contextgarden/context wiki : https://wiki.contextgarden.net ___
[NTG-context] Re: regular expression as lua pattern
On 5/28/24 20:06, Hans Hagen wrote:
> 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
Many thanks for your reply, Hans.
I will have to study it becasue LPEGs is new stuff for me.
Many thanks for your help,
Pablo
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[NTG-context] Re: regular expression as lua pattern
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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[NTG-context] Re: regular expression as lua pattern
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
On Tue, May 28, 2024 at 06:12:51PM +0200, Pablo Rodriguez via ntg-context wrote:
Dear list,
I have the following sample:
\starttext
\startTEXpage[pagestate=start, offset=1em]
\startluacode
local str = "this is that"
context(str:match("(this|these)"))
\stopluacode
\stopTEXpage
\stoptext
In short, I would like to know whether it is possible to have the
regular expression (this|these) as a Lua pattern.
I mean, I need complete strings and I haven’t found the way to do it.
Many thanks for your help,
Pablo
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[NTG-context] Re: regular expression as lua pattern
On 5/28/24 18:25, Tomáš Hála wrote: > Hi Pablo, > > unfortunately, that it is not possible: > > http://lua-users.org/wiki/PatternsTutorial, section Limitations. Many thanks for your reply, Tomáš. It is clear to me now. Pablo ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror) archive : https://github.com/contextgarden/context wiki : https://wiki.contextgarden.net ___
[NTG-context] Re: regular expression as lua pattern
Hi Pablo,
unfortunately, that it is not possible:
http://lua-users.org/wiki/PatternsTutorial, section Limitations.
The best,
Tomáš
On Tue, May 28, 2024 at 06:12:51PM +0200, Pablo Rodriguez via ntg-context wrote:
> Dear list,
>
> I have the following sample:
>
> \starttext
> \startTEXpage[pagestate=start, offset=1em]
> \startluacode
> local str = "this is that"
> context(str:match("(this|these)"))
> \stopluacode
> \stopTEXpage
> \stoptext
>
> In short, I would like to know whether it is possible to have the
> regular expression (this|these) as a Lua pattern.
>
> I mean, I need complete strings and I haven’t found the way to do it.
>
> Many thanks for your help,
>
> Pablo
> ___
> If your question is of interest to others as well, please add an entry to the
> Wiki!
>
> maillist : ntg-context@ntg.nl /
> https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
> webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
> archive : https://github.com/contextgarden/context
> wiki : https://wiki.contextgarden.net
> ___
___
If your question is of interest to others as well, please add an entry to the
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