[C++-sig] [Boost.Python] map_indexing_suite problem

[Jan Langer]

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Joel de Guzman wrote:
>>>I ran into a problem with Boost.Python exporting a std::map. I used the
>>>following code below. I use Boost 1.33.0 and everything compiles fine.
>>
>>Have you tried setting NoProxy template parameter to true?
>>
>>    class_ <map_t, true> ("test_map")
> 
> This is the same issue as discussed in:
> http://mail.python.org/pipermail/c++-sig/2004-March/007029.html
> 
> I've just added a fix for this that regards std::string and
> std::complex as no-proxy types.

Hello,
I tried setting NoProxy to true and it worked in the example I posted.
However my real example is a little more complicated. I copied the
relevant part below:

  struct domain
  {};

  struct graph
  {
    typedef std::map <int, boost::shared_ptr <domain> > domains_t;
    domains_t domains_;
  };

  class_<domain, boost::shared_ptr <domain> > ("domain");

//  objects::class_value_wrapper <boost::shared_ptr<domain>,
//     objects::make_ptr_instance <domain,
//     objects::pointer_holder <boost::shared_ptr<domain>, domain> > > ();

  class_<graph::domains_t> ("domains_map")
    .def (map_indexing_suite<graph::domains_t, true> ());

  class_<graph> ("graph")
    .def_readonly ("domains", &graph::domains_);

This code (used in a module called pdg) can be compiled and imported in
Python:

import pdg
g = pdg.graph ()
for el in g.domains:
    print el.key(),
    dom = el.data()

But the last line gives an error:

TypeError: No Python class registered for C++ class
Q25boostt10shared_ptr1ZQ23pdg6domain

If I comment out the three lines with class_value_wrapper (I saw
something like that in the examples) and remove shared_ptr from the
class_ definition of domain, I get the same error.

I hope that makes my problem clearer.
Regards,
Jan Langer
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