Re: [NTG-context] lpeg pattern in function

7 Aug 2021


      Thank you, Hans. Very nice indeed your solutions.

Marcus Vinicius

On Sat, Aug 7, 2021 at 5:37 AM Hans Hagen  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
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                                           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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