python/example/std_pair.cpp at develop · willcrichton/python · GitHub

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// 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);

}

python/example/std_pair.cpp at develop · willcrichton/python · GitHub

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