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 OBJECT_ITEMS_DWA2002615_HPP
6 # define OBJECT_ITEMS_DWA2002615_HPP
7
8 # include <boost/python/detail/prefix.hpp>
9
10 # include <boost/python/proxy.hpp>
11 # include <boost/python/object_core.hpp>
12 # include <boost/python/object_protocol.hpp>
13
14 namespace boost { namespace python { namespace api {
15
16 struct const_item_policies
17 {
18 typedef object key_type;
19 static object get(object const& target, object const& key);
20 };
21
22 struct item_policies : const_item_policies
23 {
24 static object const& set(object const& target, object const& key, object const& value);
25 static void del(object const& target, object const& key);
26 };
27
28 //
29 // implementation
30 //
31 template <class U>
32 inline object_item
operator [](object_cref key)33 object_operators<U>::operator[](object_cref key)
34 {
35 object_cref2 x = *static_cast<U*>(this);
36 return object_item(x, key);
37 }
38
39 template <class U>
40 inline const_object_item
operator [](object_cref key) const41 object_operators<U>::operator[](object_cref key) const
42 {
43 object_cref2 x = *static_cast<U const*>(this);
44 return const_object_item(x, key);
45 }
46
47 template <class U>
48 template <class T>
49 inline const_object_item
operator [](T const & key) const50 object_operators<U>::operator[](T const& key) const
51 {
52 return (*this)[object(key)];
53 }
54
55 template <class U>
56 template <class T>
57 inline object_item
operator [](T const & key)58 object_operators<U>::operator[](T const& key)
59 {
60 return (*this)[object(key)];
61 }
62
get(object const & target,object const & key)63 inline object const_item_policies::get(object const& target, object const& key)
64 {
65 return getitem(target, key);
66 }
67
set(object const & target,object const & key,object const & value)68 inline object const& item_policies::set(
69 object const& target
70 , object const& key
71 , object const& value)
72 {
73 setitem(target, key, value);
74 return value;
75 }
76
del(object const & target,object const & key)77 inline void item_policies::del(
78 object const& target
79 , object const& key)
80 {
81 delitem(target, key);
82 }
83
84 }}} // namespace boost::python::api
85
86 #endif // OBJECT_ITEMS_DWA2002615_HPP
87