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Editing: pyobject_type.hpp

// Copyright David Abrahams 2002.
// 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)
#ifndef PYOBJECT_TYPE_DWA2002720_HPP
# define PYOBJECT_TYPE_DWA2002720_HPP

# include <boost/python/cast.hpp>

namespace boost { namespace python { namespace converter {

BOOST_PYTHON_DECL inline
PyObject* checked_downcast_impl(PyObject *obj, PyTypeObject *type)
{
  return (PyType_IsSubtype(Py_TYPE(obj), type) ? obj : NULL);
}
// Used as a base class for specializations which need to provide
// Python type checking capability.
template <class Object, PyTypeObject* pytype>
struct pyobject_type 
{
    static bool check(PyObject* x)
    {
        return ::PyObject_IsInstance(x, (PyObject*)pytype);
    }

static Object* checked_downcast(PyObject* x)
    {
        return python::downcast<Object>(
            (checked_downcast_impl)(x, pytype)
            );
    }
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
    static PyTypeObject const* get_pytype() { return pytype; }
#endif
};

}}} // namespace boost::python::converter

#endif // PYOBJECT_TYPE_DWA2002720_HPP

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