conv text and pure

[Daniel Davidson]

On Thursday, 24 October 2013 at 00:02:30 UTC, bearophile wrote:
> Jonathan M Davis:
>
>> Progress is being made on that however (as evidenced by the
>> fact that format can now be pure in the beta for 2.064).
>
> Now two of the most common "offenders" of pure/nothrow in my 
> high level code are iota() and arr.dup.
>
> Bye,
> bearophile

Is arr.dup really impure or is it something queued up to become 
pure?

Thanks
Dan