• boost.python
• FunctionOverloading

From http://www.boost.org/doc/libs/1_37_0/libs/python/doc/v2/overloads.html

Few methods and functions have parameters by default.

To send this information to boost::python, you need to call theses instructions :

BOOST_PYTHON_FUNCTION_OVERLOADS( overloadsname , functionname , arg_minimum, arg_maximum ) BOOST_PYTHON_FUNCTION_OVERLOADS( overloadsname , classname::staticmethodname , arg_minimum, arg_maximum )

For global functions and for static methods.

BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS( overloadsname , classname::methodname, arg_minimum, arg_maximum )

For class methods.

Sample :

#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;

tuple f(int x = 1, double y = 4.25, char const* z = "wow") {

• return make_tuple(x, y, z);

}

BOOST_PYTHON_FUNCTION_OVERLOADS(f_overloads, f, 0, 3)

class X {

• X( const int& _loc) {

  • localval=_loc;
  } int returnsame(int x=5) {
  • return x+localval;
  } static int returnsum(int m,int x=10) {
  • return m+x;
  } int localval;

};

BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS(X_returnsame_overloads, X::returnsame, 0, 1) BOOST_PYTHON_FUNCTION_OVERLOADS(X_returnsum_overloads, X::returnsum, 1, 2)

BOOST_PYTHON_MODULE(args_ext) {

• def("f", f,
  • f_overloads(
    • args("x", "y", "z"), "This is f's docstring"
    ));

  class_<X>("X", init<int>())

  • def("returnsame", &X::returnsame,

    • X_returnsame_overloads(
      • args("x"), "returnsame's docstring"
      )
    )

  • def("returnsum", &X::returnsum,

    • X_returnsum_overloads( args("x","m"), "returnsum's docstring"
    • )
    )
  • staticmethod("returnsum") ;

}