The following snippet behaves differently with CPython and PyPy.

>>> import cppyy
>>> cppyy.cppdef('void f(){}')
True
>>> cppyy.gbl.f.__sig2exc__
False  # CPython
AttributeError: 'CPPStaticOverload' object has no attribute '__sig2exc__'  # PyPy

I didn't find this mentioned in the documentation here. Is this the expected behavior, currently?

This happened on Linux with cppyy 3.1.2 from conda-forge with PyPy 7.3 and Python 3.10, respectively.