Deduplicating Template Parameter List of std.variant.Algebraic

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On Friday, 25 September 2015 at 16:08:41 UTC, Nordlöw wrote:
> How can a template parameter list be deduplicated or sorted?

You can use http://dlang.org/phobos/std_meta.html#.NoDuplicates. 
I imagine this was an oversight in the implementation of 
Algebraic.