[C++-sig] Re: yet another: TypeError: No to_python (by-value) converter found for C++ type:

[tALSit de CoD]

Hmm... i've been trying to understand it, i've read the docs... but... 
ummm... i can't quite understand it very well...

Does this mean that when my class does:

const std::vector <cNodeDescriptor *> cRegistry::getDescriptors ();

i have to replace that with this:

boost::indirect_iterator<std::vector<cNodeDescriptor*>::iterator> 
cRegistry::getDescriptors ();

Or am i just totally missing the point?

Most of the template magic voodoo still baffels me... :D


David Abrahams wrote:
> "tALSit de CoD" <talsit at talsit.org> writes:
>
>
>>Hey guys!
>>I know this has been answered to some extent before, but I just can't 
get to grips with it, so i know i'm doing something wrong...
>>
>>I export the following:
>>
>>//----------------------------------------------------------------
class_ <cNodeDescriptor, boost::noncopyable> ("cNodeDescriptor",
no_init)
>>	.def ("getClassId",&cNodeDescriptor::getClassId)
>>	.def ("getName",&cNodeDescriptor::getName, return_value_policy
>><copy_const_reference> ())
>>	;
>>
>>//----------------------------------------------------------------
class_ <std::vector <cNodeDescriptor *> > ("cNodeDescriptorList")
>>	.def ("__iter__",	iterator <std::vector <cNodeDescriptor *> > ()) ;
>>
>>And then, in python, i grab a cNodeDescriptorList, and when i try to 
iterate through it, it spits out:
>>
>>TypeError: No to_python (by-value) converter found for C++ type: class 
kikura::cNodeDescriptor *
>>
>>So... what am i doing wrong?
>>
>>If more info is needed, i'd be glad to supply it...
>
>
> Try using range
> (http://www.boost.org/libs/python/doc/v2/iterator.html#range-spec) with
a functions that return
> boost::indirect_iterator<std::vector<cNodeDescriptor*>::iterator>
wrapped around the vector's begin() and end().
> (http://www.boost.org/libs/iterator/doc/indirect_iterator.html)
>
> HTH,




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