[R] Just curiosity

Martin Maechler maechler at stat.math.ethz.ch
Wed Nov 11 18:17:49 CET 1998

>>>>> "Kjetil" == Kjetil Halvorsen <khal at alumni.uv.es> writes:

    Kjetil> Can anybody explain why
    >> ?function
    Kjetil> + + + ) Error: syntax error

    Kjetil> so that
    >> ?"function"

    Kjetil> is necessarty???

    Kjetil> This seems reasonable with

    Kjetil> ?"?",

    Kjetil> but I can not see why the "" are necessary with function (and
    Kjetil> some other examples)


is a reserved word.

The following is (de-latexified) from "R-devel/doc/manual/primitive-funs.tex"
((which you will see as one of the first appendices in
  RHOME/doc/manual/Man.dvi   after "make dvi" 
  in R 0.63 (to be released soon)

*  ``Special functions'' which really are \emph{language} elements,
   however exist as .Primitive functions in R:

      {   (   if   for   while   repeat   break   next
      return   function   on.exit
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