Michal, Thanks for the response. I was able to locate the following post (http://www.nabble.com/Exposing-members-of-members-td21545250.html) and following sample code mentioned in the post (http://cci.lbl.gov/cctbx_sources/boost_adaptbx/) that were very helpful. In fact, exactly what I was looking for. Good luck. 2009/4/16 Michał Nowotka :

I think I can partially answer your question. Although I don't know how to expose std::pair using indexing suite, thanks to Roman Yakovenko and his Py++ package, I can show you working example of exporting pair using different approach:

This is *.h file with class containing variable of type std::pair to be exposed (this file is also available here: http://pygccxml.svn.sourceforge.net/viewvc/pygccxml?view=rev):

// Copyright 2004-2008 Roman Yakovenko. // Distributed under the Boost Software License, Version 1.0. (See // accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt)

#ifndef __std_pair_to_be_exported_hpp__ #define __std_pair_to_be_exported_hpp__

#include <utility>

struct tester_t{    tester_t(int a, int b){       pair_.first = a;       pair_.second = b;    }

   int compute(){return pair_.first + pair_.second;}

   std::pair pair_; }; #endif//__std_pair_to_be_exported_hpp__

And here is wrapper code generated by Py++:

// This file has been generated by Py++.

// Copyright 2004-2008 Roman Yakovenko. // Distributed under the Boost Software License, Version 1.0. (See // accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt)

#include "boost/python.hpp"

#include "std_pair_to_be_exported.hpp"

namespace bp = boost::python;

BOOST_PYTHON_MODULE(std_pair){    bp::class_< std::pair< int, int > >( "pair_less__int_comma__int__greater_", "documentation", bp::init<

...

("documentation") )        .def( bp::init< int const &, int const & >(( bp::arg("__a"), bp::arg("__b") ), "documentation") )        .def_readwrite( "first", &std::pair< int, int >::first, "documentation" )        .def_readwrite( "second", &std::pair< int, int >::second, "documentation" );

   bp::class_< tester_t >( "tester_t", "documentation", bp::init< int, int >(( bp::arg("a"), bp::arg("b") ), "documentation") )        .def(            "compute"            , (int ( ::tester_t::* )(  ) )( &::tester_t::compute )            , "documentation" )        .def_readwrite( "pair_", &tester_t::pair_, "documentation" ); }

You should notice that in python: pairA = module.pair_less__int_comma__int__greater_(2,3) pairB = module.pair_less__int_comma__int__greater_(2,3) pairA.first == pairB.first

...

True

pairA.second == pairB.second

...

True

BUT:

pairA == pairB

...

False

I'm also interested in exposing std::pair using indexing suite because it perhaps make statement pairA == pairB become true. Especially if that code would be auto-generated by Py++ just like other STL containers it could be very useful. Roman Yakovenko wrote there is a chance this functionality would be added in next release of Py++.

Also you can ask this question on Cplusplus-sig mailing list: http://mail.python.org/mailman/listinfo/cplusplus-sig

If you find accurate answer to your question, please let me know.

-- Regards

Michał Nowotka _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users