sl@0: // Copyright David Abrahams 2002.
sl@0: // Distributed under the Boost Software License, Version 1.0. (See
sl@0: // accompanying file LICENSE_1_0.txt or copy at
sl@0: // http://www.boost.org/LICENSE_1_0.txt)
sl@0: #ifndef OBJECT_SLICES_DWA2002615_HPP
sl@0: # define OBJECT_SLICES_DWA2002615_HPP
sl@0: 
sl@0: # include <boost/python/detail/prefix.hpp>
sl@0: 
sl@0: # include <boost/python/proxy.hpp>
sl@0: # include <boost/python/object_core.hpp>
sl@0: # include <boost/python/object_protocol.hpp>
sl@0: # include <boost/python/handle.hpp>
sl@0: # include <utility>
sl@0: 
sl@0: namespace boost { namespace python { namespace api {
sl@0: 
sl@0: struct const_slice_policies
sl@0: {
sl@0:     typedef std::pair<handle<>, handle<> > key_type;
sl@0:     static object get(object const& target, key_type const& key);
sl@0: };
sl@0:   
sl@0: struct slice_policies : const_slice_policies
sl@0: {
sl@0:     static object const& set(object const& target, key_type const& key, object const& value);
sl@0:     static void del(object const& target, key_type const& key);
sl@0: };
sl@0: 
sl@0: //
sl@0: // implementation
sl@0: //
sl@0: template <class U>
sl@0: object_slice
sl@0: object_operators<U>::slice(object_cref start, object_cref finish)
sl@0: {
sl@0:     object_cref2 x = *static_cast<U*>(this);
sl@0:     return object_slice(x, std::make_pair(borrowed(start.ptr()), borrowed(finish.ptr())));
sl@0: }
sl@0: 
sl@0: template <class U>
sl@0: const_object_slice
sl@0: object_operators<U>::slice(object_cref start, object_cref finish) const
sl@0: {
sl@0:     object_cref2 x = *static_cast<U const*>(this);
sl@0:     return const_object_slice(x, std::make_pair(borrowed(start.ptr()), borrowed(finish.ptr())));
sl@0: }
sl@0: 
sl@0: template <class U>
sl@0: object_slice
sl@0: object_operators<U>::slice(slice_nil, object_cref finish)
sl@0: {
sl@0:     object_cref2 x = *static_cast<U*>(this);
sl@0:     return object_slice(x, std::make_pair(allow_null((PyObject*)0), borrowed(finish.ptr())));
sl@0: }
sl@0: 
sl@0: template <class U>
sl@0: const_object_slice
sl@0: object_operators<U>::slice(slice_nil, object_cref finish) const
sl@0: {
sl@0:     object_cref2 x = *static_cast<U const*>(this);
sl@0:     return const_object_slice(x, std::make_pair(allow_null((PyObject*)0), borrowed(finish.ptr())));
sl@0: }
sl@0: 
sl@0: template <class U>
sl@0: object_slice
sl@0: object_operators<U>::slice(slice_nil, slice_nil)
sl@0: {
sl@0:     object_cref2 x = *static_cast<U*>(this);
sl@0:     return object_slice(x, std::make_pair(allow_null((PyObject*)0), allow_null((PyObject*)0)));
sl@0: }
sl@0: 
sl@0: template <class U>
sl@0: const_object_slice
sl@0: object_operators<U>::slice(slice_nil, slice_nil) const
sl@0: {
sl@0:     object_cref2 x = *static_cast<U const*>(this);
sl@0:     return const_object_slice(x, std::make_pair(allow_null((PyObject*)0), allow_null((PyObject*)0)));
sl@0: }
sl@0: 
sl@0: template <class U>
sl@0: object_slice
sl@0: object_operators<U>::slice(object_cref start, slice_nil)
sl@0: {
sl@0:     object_cref2 x = *static_cast<U*>(this);
sl@0:     return object_slice(x, std::make_pair(borrowed(start.ptr()), allow_null((PyObject*)0)));
sl@0: }
sl@0: 
sl@0: template <class U>
sl@0: const_object_slice
sl@0: object_operators<U>::slice(object_cref start, slice_nil) const
sl@0: {
sl@0:     object_cref2 x = *static_cast<U const*>(this);
sl@0:     return const_object_slice(x, std::make_pair(borrowed(start.ptr()), allow_null((PyObject*)0)));
sl@0: }
sl@0: # if !defined(BOOST_MSVC) || BOOST_MSVC > 1300
sl@0: template <class U>
sl@0: template <class T, class V>
sl@0: inline const_object_slice
sl@0: object_operators<U>::slice(T const& start, V const& end) const
sl@0: {
sl@0:     return this->slice(
sl@0:         typename slice_bound<T>::type(start)
sl@0:         , typename slice_bound<V>::type(end));
sl@0: }
sl@0: 
sl@0: template <class U>
sl@0: template <class T, class V>
sl@0: inline object_slice
sl@0: object_operators<U>::slice(T const& start, V const& end)
sl@0: {
sl@0:     return this->slice(
sl@0:         typename slice_bound<T>::type(start)
sl@0:         , typename slice_bound<V>::type(end));
sl@0: }
sl@0: # endif 
sl@0: 
sl@0: 
sl@0: inline object const_slice_policies::get(object const& target, key_type const& key)
sl@0: {
sl@0:     return getslice(target, key.first, key.second);
sl@0: }
sl@0: 
sl@0: inline object const& slice_policies::set(
sl@0:     object const& target
sl@0:     , key_type const& key
sl@0:     , object const& value)
sl@0: {
sl@0:     setslice(target, key.first, key.second, value);
sl@0:     return value;
sl@0: }
sl@0: 
sl@0: inline void slice_policies::del(
sl@0:     object const& target
sl@0:     , key_type const& key)
sl@0: {
sl@0:     delslice(target, key.first, key.second);
sl@0: }
sl@0: 
sl@0: }}} // namespace boost::python::api
sl@0: 
sl@0: #endif // OBJECT_SLICES_DWA2002615_HPP