A bit over four years after the 0.1 initial release, monoid-subclasses-1.0 has been released. There are some slight backward compatibility breaks. Most significantly, some of the subclasses of
Monoid have become subclasses of
Semigroup instead. There are constraint synonyms in place for the old classes, so most client code should continue to work. I’m planning to deprecate the constraint synonyms with version 1.1.