Hi guys,

Take is an iterator adaptor which cuts off the contained iterator after
some number of elements, always returning None.

I find that I need to detect whether I'm getting None from a Take
iterator because I've read all of the elements I expected or because the
underlying iterator ran dry unexpectedly. (Specifically, I'm parsing
some data from the network and want to detect an early EOM.)


This seems like it might be only me, so I'm posing this to the list: if
there was a function Take::is_done(&self) -> bool, which returned whether
or not the Take had returned as many elements as it could, would that be
generally useful?

I'm happy to submit a PR but want to check that this is appropriate for
the standard library.



Thanks

Andrew



-- 
Andrew Poelstra
Mathematics Department, University of Texas at Austin
Email: apoelstra at wpsoftware.net
Web:   http://www.wpsoftware.net/andrew

"If they had taught a class on how to be the kind of citizen Dick Cheney
 worries about, I would have finished high school."   --Edward Snowden

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