[C++-sig] Wrapping std::vector<AbstractClass*>

[Paul Melis]

Joel de Guzman wrote:

>Joel de Guzman wrote:
>  
>
>>Paul Melis wrote:
>>
>>    
>>
>>>Hello,
>>>I have an abstract class and a std::vector<> of pointers to this class. 
>>>A routine in my c++ code fills a vector with objects of classes derived 
>>>      
>>>
>>>from the abstract class.
>>    
>>
>>>I'd like to iterate over the vector in python and use each of the items 
>>>in the vector depending on the type of derived class.
>>>
>>>      
>>>
>>[...]
>>
>>    
>>
>>>I suspect that boost.python will wrap the return value of returnList() 
>>>as a pointer to Abstract, without the possibility at runtime to look at 
>>>the actual object type. Is this something I would have to code by hand? 
>>>For example, by making a routine that takes a pointer to Abstract and 
>>>uses dynamic_cast<> to test which of the concrete classes the object 
>>>actually is from?
>>>      
>>>
>>Pardon the delay. It's been a while. I'm investigating the problem
>>in more detail. I'll get back to you on this, ok?
>>    
>>
>
>Ok... Replying to myself...
>
>I committed a fix. The problem occurs when lst[0] tries to return
>a copy and there's no way to provide a call policy. So, the
>behavior now is for wrapped containers of pointers to always
>return by internal reference.
>
>Cheers,
>  
>
Hi,
I'll check after I get back from holidays (in a month ;-))

Thanks,
Paul