[Rd] callCC in 2.7.0

[f.jamitzky]

callcc is similar to the "yield" keyword in python and c#
it lets you define e.g. a generator of lists of numbers.




Gabor Grothendieck wrote:
> 
> Would anyone like to explain if callCC in R 2.7.0 gives
> anything that on.exit does not already provide?
> 
> It seems that the exit condition once defined cannot
> be added to overridden whereas with on.exit multiple
> on.exit's add additional on.exits rather than being ignored.
> 
> Is this important?
> 
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> 
> 

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