[C++-sig] downcasting problems

[Hans Meine]

On Sonntag 28 September 2008, Renato Araujo wrote:
> =======================================
> the python test is this, and this always output  "FAIL":
> =======================================
>
> if __name__ == '__main__':
>     shape = Shape()
>     circle = Circle(shape)
>     p = circle.parent()
>     if (p == shape):
>         print "OK"
>     else:
>         print "FAIL"

Maybe it's your test which is wrong - you're testing for *identity* (since no 
equality comparison operators are defined) of the *python* objects.  If you 
want to achieve that, using wrappers is one method, using shared_ptrs is 
another one AFAICS (but then you wrote "without changing the c++ code").

But anyhow, the p and shape may not satisfy ==, but they'll still "be the same 
[c++] object".

-- 
Ciao, /  /                                                    .o.
     /--/                                                     ..o
    /  / ANS                                                  ooo
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