| // Copyright Ralf W. Grosse-Kunstleve 2002-2004. 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/module.hpp> |
| #include <boost/python/def.hpp> |
| #include <boost/python/tuple.hpp> |
| #include <boost/python/to_python_converter.hpp> |
| |
| namespace { // Avoid cluttering the global namespace. |
| |
| // Converts a std::pair instance to a Python tuple. |
| template <typename T1, typename T2> |
| struct std_pair_to_tuple |
| { |
| static PyObject* convert(std::pair<T1, T2> const& p) |
| { |
| return boost::python::incref( |
| boost::python::make_tuple(p.first, p.second).ptr()); |
| } |
| static PyTypeObject const *get_pytype () {return &PyTuple_Type; } |
| }; |
| |
| // Helper for convenience. |
| template <typename T1, typename T2> |
| struct std_pair_to_python_converter |
| { |
| std_pair_to_python_converter() |
| { |
| boost::python::to_python_converter< |
| std::pair<T1, T2>, |
| std_pair_to_tuple<T1, T2>, |
| true //std_pair_to_tuple has get_pytype |
| >(); |
| } |
| }; |
| |
| // Example function returning a std::pair. |
| std::pair<int, int> |
| foo() { return std::pair<int, int>(3, 5); } |
| |
| } // namespace anonymous |
| |
| BOOST_PYTHON_MODULE(std_pair_ext) |
| { |
| using namespace boost::python; |
| std_pair_to_python_converter<int, int>(); |
| def("foo", foo); |
| } |