[Rd] ?if (PR#3179)

Peter Dalgaard BSA p.dalgaard at biostat.ku.dk
Tue Jun 3 20:10:28 MEST 2003

Prof Brian Ripley <ripley at stats.ox.ac.uk> writes:

> What makes you think that is a bug?
> ?"if" and help("if") work
> `An Introduction to R' says
> For a feature specified by special characters, the argument must be
> enclosed in double or single quotes, making it a ``character string'':

To be precise, we should probably insert "or a reserved word"
in that sentence. 

The point is that parsing occurs prior to the logic that runs help on
the (deparsed) argument, so it's technically no different from "-if"
or "!for" which are also syntactically invalid. The question mark is
just another operator at this stage.

   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907

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