TypeError: unsupported operand type(s) for |: 'PatternBase' and 'PatternBase'

[goncalossilva]

Hey, and thanks for this library! I have an issue declaring a union of different date/time format patterns.

This works:

MyDate = Union[DatePattern["%F"], DateTimePattern["%FT%T"], UTCDateTimePattern["%FT%TZ"]]

While this doesn't:

MyDate = DatePattern["%F"] | DateTimePattern["%FT%T"] | UTCDateTimePattern["%FT%TZ"]

I'm sticking with the former for now, even though the rest of the tooling doesn't really like it due to UP007.

[goncalossilva]

This also happens when the union is with None:

TypeError: unsupported operand type(s) for |: 'PatternBase' and 'NoneType'