[C++-sig] Re: Making copy of function derived from C++ pure virtual function
Paul F. Kunz
Paul_Kunz at slac.stanford.edu
Mon Dec 13 20:12:33 CET 2004
>>>>> On Mon, 13 Dec 2004 14:06:26 -0500, David Abrahams <dave at boost-consulting.com> said:
>> FunctionWrap * t = const_cast < FunctionWrap * > ( this );
>> object self = get_owner ( t );
>> // Find its most-derived Python class object my_class =
>> // call the copy ctor through Python.
>> py_result = my_class(self);
> Ahem. Which line above and precisely which part of the expression
> on that line is being evaluated?
The last line, my_class(self)
>> This probably doesn't help, but thought I mentioned it in case it
>> rings a bell.
> No bell-ringing. The exception should be caught by Boost.Python and
> returned to Python as a Python exception. Python isn't issuing any
> error message?
No error message from Python. Just silently returns a NULL
I am trying to find a way to isolate the problem.
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