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- // 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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