Re: lpeg pattern in function

[Marcus Vinicius Mesquita via ntg-context <ntg-context@ntg.nl>]

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Thank you, Hans. Very nice indeed your solutions.

Marcus Vinicius

On Sat, Aug 7, 2021 at 5:37 AM Hans Hagen <j.hagen@xs4all.nl> wrote:

> On 8/6/2021 10:58 PM, Marcus Vinicius Mesquita via ntg-context wrote:
> > Dear list,
> > in the mwe below, the expected result is ok for most entries but fails
> > when the word contains the letters ó or ô.
> > We get zoolco instead of zoológico, and termtro instead of termômetro.
> > What am I doing wrong?
> >
> > mwe:
> >
> > \def\stripnumber#1%
> >          {\cldcontext{lpeg.match(lpeg.stripper("[¹²³⁴⁵⁶⁷⁸⁹⁰]"),
> > [==[#1]==])}}
> >
> > \starttext
> >
> > \stripnumber{árbitro⁶}
> > \stripnumber{ébano¹}
> > \stripnumber{ícone⁸}
> > \stripnumber{zoológico⁰}
> > \stripnumber{eletroacústico⁹}
> > \stripnumber{trânsfuga⁷}
> > \stripnumber{farmacêutico¹}
> > \stripnumber{maître²}
> > \stripnumber{termômetro³}
> > \stripnumber{noûs⁴}
> >
> > \stoptext
>
>
> \def\stripnumber#1%
>    {\cldcontext{lpeg.match(lpeg.stripper(lpeg.US("¹²³⁴⁵⁶⁷⁸⁹⁰")),
> [==[#1]==])}}
>
> (US -> utf set)
>
> or
>
> \startluacode
>      local s = lpeg.stripper(lpeg.US("¹²³⁴⁵⁶⁷⁸⁹⁰"))
>      function document.StripNumber(str)
>          context(lpeg.match(s, str))
>      end
> \stopluacode
>
> \def\stripnumber#1{\ctxlua{document.StripNumber([==[#1]==])}}
>
> or you can go fancy:
>
> \startluacode
>      local p_strip = lpeg.stripper(lpeg.US("¹²³⁴⁵⁶⁷⁸⁹⁰"))
>
>      interfaces.implement {
>          name      = "StripNumber",
>          public    = true,
>          arguments = "string",
>          actions   = function(str)
>              context(lpeg.match(p_strip, str))
>          end
>      }
> \stopluacode
>
> \StripNumber{zoológico⁰}
>
> There are more efficient variants but i guess it's good enough.
>
> Hans
>
> -----------------------------------------------------------------
>                                            Hans Hagen | PRAGMA ADE
>                Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>         tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> -----------------------------------------------------------------
>


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Kunnâsh al-Hâ'ik (Cancioneiro de al-Hâ'ik)

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