I realize that it's impossible to know which function to call from f(5) in the code I posted, but I get an error even if remove the default value for the boolean in the second call, in which case it's pretty clear which function I am calling. Any thoughts? Thanks. On Fri, Apr 17, 2009 at 5:25 PM, A B <python6009@gmail.com> wrote:

Does anyone know why the following sample fails (it was adapted  from the boost overloading example) and how to do this correctly. Thanks in advance.

#include <boost/python/module.hpp> #include <boost/python/def.hpp> #include <boost/python/args.hpp> #include <boost/python/tuple.hpp> #include <boost/python/class.hpp> #include <boost/python/overloads.hpp> #include <boost/python/return_internal_reference.hpp>

using namespace boost::python;

struct X

{

    int f(int x, double y = 4.25, char const* z = "wow")

    {

        return x;

    }

    int f(int x, bool b = true) {

        return x;

    }

};

BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS(f_member_overloads, X::f, 1, 3)

BOOST_PYTHON_MODULE(args_ext)

{

    class_<X>("X", "This is X's docstring")

        .def("f1", &X::f,

             f_member_overloads(args("x", "y", "z"), "f's docstring"

                                )[return_internal_reference<>()]

             )

        ;

}

g++ -fpic -shared -o test.so test.cpp -lpython2.4 -lboost_python -I/usr/include/python2.4

test.cpp: In function ‘void init_module_args_ext()’:

test.cpp:31: error: no matching function for call to ‘boost::python::class_<X, boost::python::detail::not_specified, boost::python::detail::not_specified, boost::python::detail::not_specified>::def(const char [3], <unresolved overloaded function type>, boost::python::detail::overloads_proxy<boost::python::return_internal_reference<1ul, boost::python::default_call_policies>, f_member_overloads>)’