I try with +foo in place of ~foo.
Kotlin propose the null-safety
<https://kotlinlang.org/docs/reference/null-safety.html> with foo?, but
this syntax has a impact of the BNF and all others tools.

Le jeu. 29 août 2019 à 15:58, Ricky Teachey <ri...@teachey.org> a écrit :

> I like this idea.
>
>
>> The ~foo for Optional is... not that obvious.  Not sure it's a win.
>>
>>
>  I agree. Seems like `foo | None` is just as readable. Assuming that None
> would be swapped out for NoneType, of course.
>
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