ceph/src/boost/boost/python/converter/pyobject_type.hpp

   1 // Copyright David Abrahams 2002.
   2 // Distributed under the Boost Software License, Version 1.0. (See
   3 // accompanying file LICENSE_1_0.txt or copy at
   4 // http://www.boost.org/LICENSE_1_0.txt)
   5 #ifndef PYOBJECT_TYPE_DWA2002720_HPP
   6 # define PYOBJECT_TYPE_DWA2002720_HPP
   7
   8 # include <boost/python/cast.hpp>
   9
  10 namespace boost { namespace python { namespace converter {
  11
  12 BOOST_PYTHON_DECL inline
  13 PyObject* checked_downcast_impl(PyObject *obj, PyTypeObject *type)
  14 {
  15   return (PyType_IsSubtype(Py_TYPE(obj), type) ? obj : NULL);
  16 }
  17 // Used as a base class for specializations which need to provide
  18 // Python type checking capability.
  19 template <class Object, PyTypeObject* pytype>
  20 struct pyobject_type
  21 {
  22     static bool check(PyObject* x)
  23     {
  24         return ::PyObject_IsInstance(x, (PyObject*)pytype);
  25     }
  26
  27     static Object* checked_downcast(PyObject* x)
  28     {
  29         return python::downcast<Object>(
  30             (checked_downcast_impl)(x, pytype)
  31             );
  32     }
  33 #ifndef BOOST_PYTHON_NO_PY_SIGNATURES
  34     static PyTypeObject const* get_pytype() { return pytype; }
  35 #endif
  36 };
  37
  38 }}} // namespace boost::python::converter
  39
  40 #endif // PYOBJECT_TYPE_DWA2002720_HPP