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  • Yuya Nishihara's avatar
    error: make HintException a mix-in class not derived from BaseException (API) · 945b4c14c570
    Yuya Nishihara authored
    HintException is unrelated to the hierarchy of errors. It is an implementation
    detail whether a class inherits from HintException or not, a sort of "private
    inheritance" in C++.
    
    New Hint isn't an exception class, which prevents catching error by its type:
    
        try:
            dosomething()
        except error.Hint:
            pass
    
    Unfortunately, this passes on PyPy 5.3.1, but not on Python 2, and raises more
    detailed TypeError on Python 3.
    945b4c14c570