R-alpha: buglet in return(invisible()) [R 0.50 and 0.60]

[Peter Dalgaard BSA]

Luke Tierney <luke@stat.umn.edu> writes:

> Other languages take a different approach -- they allow a function
> used for side effects to return no values, so there is nothing to
> print -- this covers most though not all cases where invisible() is
> used now.

If you think in terms of functionality as opposed to actually calling
invisible(), a rather notorious exception would be "<-". It's a
primitive, not a function, but it returns the evaluated right hand
side without printing it.

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