// 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 OBJECT_ATTRIBUTES_DWA2002615_HPP

 # define OBJECT_ATTRIBUTES_DWA2002615_HPP

 # include <boost/python/detail/prefix.hpp>

 # include <boost/python/proxy.hpp>

 # include <boost/python/object_core.hpp>

 # include <boost/python/object_protocol.hpp>

 namespace boost { namespace python { namespace api {

 struct const_attribute_policies

 {

     typedef char const* key_type;

     static object get(object const& target, char const* key);

 };

 struct attribute_policies : const_attribute_policies

 {

     static object const& set(object const& target, char const* key, object const& value);

     static void del(object const&target, char const* key);

 };

 //

 // implementation

 //

 template <class U>

 inline object_attribute object_operators<U>::attr(char const* name)

 {

     object_cref2 x = *static_cast<U*>(this);

     return object_attribute(x, name);

 }

 template <class U>

 inline const_object_attribute object_operators<U>::attr(char const* name) const

 {

     object_cref2 x = *static_cast<U const*>(this);

     return const_object_attribute(x, name);

 }

 inline object const_attribute_policies::get(object const& target, char const* key)

 {

     return python::getattr(target, key);

 }

 inline object const& attribute_policies::set(

     object const& target

     , char const* key

     , object const& value)

 {

     python::setattr(target, key, value);

     return value;

 }

 inline void attribute_policies::del(

     object const& target

     , char const* key)

 {

     python::delattr(target, key);

 }

 }}} // namespace boost::python::api

 #endif // OBJECT_ATTRIBUTES_DWA2002615_HPP