Allow default None for optional bools

[notmgsk]

Slots of type :bool now support a default of None in the Python messages. Specifically, when a slot has both :type :bool and :required nil, and does not have an explicit :default the resulting Python message will look something like slot: Optional[bool] = None. This allows when to differentiate between whether a false-y value was provided (False) or no value was provided None.

Todo

• Test

[notmgsk]

Ping @stylewarning @ecpeterson

[ecpeterson]

It's been a while since I've looked at this repo, and I didn't expand the PR to see its global effects, but the local diff all looks reasonable to me. I'd approve if it were up to me.

Does this PR include regenerated python bindings? Did anything change? Did you mean for something to change?

[notmgsk]

It's been a while since I've looked at this repo, and I didn't expand the PR to see its global effects, but the local diff all looks reasonable to me. I'd approve if it were up to me.

Ignoring the ceremonial "approve PR" button, it is up to you in spirit.

Does this PR include regenerated python bindings? Did anything change? Did you mean for something to change?

It does. No, and no. The intended changes were already merged in a hold-over PR, and this PR just duplicates those changes (and makes them honest).

[ecpeterson]

Ah, good. Thank you for not pinging me on the hold-over PR; I'd have had a fit.