2018-08-03 Missing signature for functions

The signature of a function is not always available in Python. The buildin functions do not follow the same pattern as functions written in Python but they provide a backup plan with the attribute __text_signature__:




    ($module, /, file, mode='r', buffering=-1, encoding=None,
         errors=None, newline=None, closefd=True, opener=None)

As a result, inspect.signature(open) returns a non empty result. However, for a function defined with pybind11, this backup plan is not available: Set the __text_signature__ attribute of callables. That’s why the class AutoSignatureDirective may or may not work with regular expressions parsing the documentation computed by pybind11 as a same function could have several C++ signature with different types.