boost/python/object_attributes.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 OBJECT_ATTRIBUTES_DWA2002615_HPP
   6 # define OBJECT_ATTRIBUTES_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_attribute_policies
  17 {
  18     typedef char const* key_type;
  19     static object get(object const& target, char const* key);
  20     static object get(object const& target, object const& key);
  21 };
  22
  23 struct attribute_policies : const_attribute_policies
  24 {
  25     static object const& set(object const& target, char const* key, object const& value);
  26     static void del(object const&target, char const* key);
  27 };
  28
  29 struct const_objattribute_policies
  30 {
  31     typedef object const key_type;
  32     static object get(object const& target, object const& key);
  33 };
  34
  35 struct objattribute_policies : const_objattribute_policies
  36 {
  37     static object const& set(object const& target, object const& key, object const& value);
  38     static void del(object const&target, object const& key);
  39 };
  40
  41 //
  42 // implementation
  43 //
  44 template <class U>
  45 inline object_attribute object_operators<U>::attr(char const* name)
  46 {
  47     object_cref2 x = *static_cast<U*>(this);
  48     return object_attribute(x, name);
  49 }
  50
  51 template <class U>
  52 inline const_object_attribute object_operators<U>::attr(char const* name) const
  53 {
  54     object_cref2 x = *static_cast<U const*>(this);
  55     return const_object_attribute(x, name);
  56 }
  57
  58 template <class U>
  59 inline object_objattribute object_operators<U>::attr(object const& name)
  60 {
  61     object_cref2 x = *static_cast<U*>(this);
  62     return object_objattribute(x, name);
  63 }
  64
  65 template <class U>
  66 inline const_object_objattribute object_operators<U>::attr(object const& name) const
  67 {
  68     object_cref2 x = *static_cast<U const*>(this);
  69     return const_object_objattribute(x, name);
  70 }
  71
  72 inline object const_attribute_policies::get(object const& target, char const* key)
  73 {
  74     return python::getattr(target, key);
  75 }
  76
  77 inline object const_objattribute_policies::get(object const& target, object const& key)
  78 {
  79     return python::getattr(target, key);
  80 }
  81
  82 inline object const& attribute_policies::set(
  83     object const& target
  84     , char const* key
  85     , object const& value)
  86 {
  87     python::setattr(target, key, value);
  88     return value;
  89 }
  90
  91 inline object const& objattribute_policies::set(
  92     object const& target
  93     , object const& key
  94     , object const& value)
  95 {
  96     python::setattr(target, key, value);
  97     return value;
  98 }
  99
 100 inline void attribute_policies::del(
 101     object const& target
 102     , char const* key)
 103 {
 104     python::delattr(target, key);
 105 }
 106
 107 inline void objattribute_policies::del(
 108     object const& target
 109     , object const& key)
 110 {
 111     python::delattr(target, key);
 112 }
 113
 114 }}} // namespace boost::python::api
 115
 116 #endif // OBJECT_ATTRIBUTES_DWA2002615_HPP