Hi Luciano,
Luciano M. Wolf wrote:
Hi,
I'm doing some experiments calling methods from parent (or
grandparent) class. I have a "Base" class defining a "test" virtual
method. Class "Derived" inherits from "Base" but does not implement
"test". At Python side (test.py) I redefine test and do a call to
"Base.test()". The program ends up with a "RuntimeError: maximum
recursion depth exceeded" error message. Any idea about this? Find
attached a small example showing how to reproduce this problem.
That's an interesting problem !
I think it is clear what is going on here: when you invoke 'base.test()'
from python, the interpreter looks up the 'right' method (i.e., picking
the 'test' attribute from the right base class dictionary. However, the
way that is implemented means it does its own lookup...including derived
classes' dictionaries. Thus the circularity that leads to the endless loop.
I'm not sure how to solve this, on a language level. I don't think there
is a way to convey the fact that the function lookup is (what C++ calls)
qualified, and thus, that it should be limited to a specific scope (the
base class).
May be someone else has ideas how to do this ?
Thanks,
Stefan
--
...ich hab' noch einen Koffer in Berlin...
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