Weird issue with std.range.iota.length

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On Friday, 12 February 2016 at 19:00:29 UTC, Andrei Alexandrescu 
wrote:
> Tried that for a while, it quickly became a mess of entangled 
> intestines. Not worth it. -- Andrei

What do you think of the solution I proposed above? It's not 
pretty but there has to be some kind of workaround. Not being 
able to use `parallel` with an iota-range of ulongs on 32-bit DMD 
is not good. If you will pre-approve it (comments/suggestions 
optional) I can submit a PR within the next day or so.