More autogeneration

[maelle]

From #840

Move more functions to be auto-generated, so that they don't need to be updated for 0.10 manually, and so that they get all the type conversion checks without extra work.

[krlmlr]

From #1071.

[krlmlr]

See #1044 for an example. Need to continue along these lines, Fleißarbeit.

[maelle]

Isn't this a duplicate of #2561?

[schochastics]

Yes, I think we are on top of this