ModelBuilderSemantics Subclassing about tatsu HOT 4 CLOSED

Python 3.7 is recent, and the semantics of metaclasses may have changed to better support typing. This case should be added as a unit test.

from tatsu.

This isn't just broken in 3.7. While the above compiles on 3.5, BinaryOp doesn't end up being a subclass of Op either. I'll see if I can come up with a fix.
Edit: As I found out, you are supposed to generate the object model as well and then use that as an instance. It's quite dubious, and not documented.

from tatsu.

@apalala What's supposed to happen if there are multiple base classes?

rule2::A::B::C = a:();

Is B a subclass of C now, and A a subclass of B?
Or does A inherit from B and C, and B is unrelated to C?

from tatsu.

@apalala What's supposed to happen if there are multiple base classes?

rule2::A::B::C = a:();

Is B a subclass of C now, and A a subclass of B?
Or does A inherit from B and C, and B is unrelated to C?

TasSu currently doesn't check that the inheritance tree makes sense. I guess the Python compiler will err if the generated Python is no good.

from tatsu.