• boost.python
• iterator

Iterators

Python iterator support a highly flexible interface allowing:

• Direct exposure of a class' begin() and end() functions:

    ...
    .def("__iter__", iterator<list_int>())

• Creation of iterators from member functions...

    ...
    .def("__iter__"
         , range(&my_class::x_begin, &my_class::x_end))

• ...and member data:

    ...
    .def("__iter__"
         , range(&std::pair<char*,char*>::first, &std::pair<char*,char*>::second))

• The ability to specify [http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/*checkout*/boost/boost/libs/python/doc/v2/CallPolicies.html CallPolicies], e.g. to prevent copying of heavyweight values:

    ...
    .def("__iter__"
         , range<return_value_policy<copy_non_const_reference> >(
               &my_sequence<heavy>::begin
             , &my_sequence<heavy>::end))