Le 23/07/2021 à 18:25, Larry Garfield a écrit :
Requiring parenthesis now leaves the option open in the future to make them
optional when doing full mixed types.
Making them optional now requires that they be optional in the future when
doing full mixed types.
I vaguely recall there being some potential issue with making them optional for full
mixed intersection/union types, but not the details. Either way, it's a not-small
decision to make, and may have complicated implications for future work. It shouldn't be
made on "eh, seems nicer" grounds in a post-freeze last minute RFC.
Making it required now is the safer option, as it allows more flexibility in
the future once someone tries to implement full union/intersection mixing.
Making it optional later may still happen, I don't know, but it doesn't box us
in to requiring it later.
This is a good point as well.
Regards,
--
Pierre
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