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139337Re: Improve context syntax file

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  • Nikolay Pavlov
    Sep 26, 2013
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      On Sep 26, 2013 1:33 PM, "Paul Isambert" <zappathustra@...> wrote:
      >
      > Marco wrote:
      > > On 2013–09–26 Nikolay Pavlov wrote:
      > >
      > > > > Does someone have a solution for the remaining two problems?
      > > >
      > > > I guess you need to alter iskeyword for the problem with
      > > > underscore.
      > >
      > > But I can't add it permanently. The underscore is only part of a
      > > word in between the following blocks.
      > >
      > >   \unprotect    … \protect %% or
      > >   \starttexcode … \stoptexcode
      >
      > Since there is little chance that an underscore will immediately follow a
      > control sequence anyway, I don't think defining it for the entire syntax file
      > will cause any problem.

      It is very common in LaTeX math:

          \int_a^b

      . Can't say anything about context though.

      In LaTeX/TeX syntax file AFAIR _ is marked as an error outside of math regions though.

      > However, you can do something along the following lines:
      >
      >   sy match ControlSequence '\\[a-zA-Z]\+'
      >   sy match SpecialControlSequence '\\[a-zA-Z_]\+' contained
      >   sy region SpecialCode matchgroup=ControlSequence start='\\unprotect' end='\\protect' contains=SpecialControlSequence

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