[swift-evolution] zip3, zip4, ...

[Matthew Johnson]

> Yes, it would, but you also need the ZipSequence to be able to support that, which would actually need variadic generics. Which aren't supported :)

Aren't supported *yet*.  I am hoping somebody writes a proposal to add them.  This isn't the first use case that has been discussed here in the first few days.  The TupleConvertible proposal would also require them to be implemented in a general fashion.
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