1 files changed, 101 insertions, 0 deletions
diff --git a/boost/python/proxy.hpp b/boost/python/proxy.hpp
new file mode 100644
index 0000000000..a956eac1cc
--- /dev/null
+++ b/boost/python/proxy.hpp
@@ -0,0 +1,101 @@
+// 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 PROXY_DWA2002615_HPP
+# define PROXY_DWA2002615_HPP
+# include <boost/python/detail/prefix.hpp>
+# include <boost/python/object_core.hpp>
+# include <boost/python/object_operators.hpp>
+
+namespace boost { namespace python { namespace api {
+
+template <class Policies>
+class proxy : public object_operators<proxy<Policies> >
+{
+    typedef typename Policies::key_type key_type;
+    
+# if !defined(BOOST_MSVC) || BOOST_MSVC >= 1300
+    typedef proxy const& assignment_self;
+# else
+    typedef proxy assignment_self;
+# endif
+ public:
+    proxy(object const& target, key_type const& key);
+    operator object() const;
+
+    // to support a[b] = c[d]
+    proxy const& operator=(assignment_self) const;
+    
+    template <class T>
+    inline proxy const& operator=(T const& rhs) const
+    {
+        Policies::set(m_target, m_key, object(rhs));
+        return *this;
+    }
+
+ public: // implementation detail
+    void del() const;
+        
+ private:
+    object m_target;
+    key_type m_key;
+};
+
+
+template <class T>
+inline void del(proxy<T> const& x)
+{
+    x.del();
+}
+
+//
+// implementation
+//
+
+template <class Policies>
+inline proxy<Policies>::proxy(object const& target, key_type const& key)
+    : m_target(target), m_key(key)
+{}
+
+template <class Policies>
+inline proxy<Policies>::operator object() const
+{
+    return Policies::get(m_target, m_key);
+}
+
+// to support a[b] = c[d]
+template <class Policies>
+inline proxy<Policies> const& proxy<Policies>::operator=(typename proxy::assignment_self rhs) const
+{
+    return *this = python::object(rhs);
+}
+
+# define BOOST_PYTHON_PROXY_INPLACE(op)                                         \
+template <class Policies, class R>                                              \
+proxy<Policies> const& operator op(proxy<Policies> const& lhs, R const& rhs)    \
+{                                                                               \
+    object old(lhs);                                                            \
+    return lhs = (old op rhs);                                                  \
+} 
+BOOST_PYTHON_PROXY_INPLACE(+=)
+BOOST_PYTHON_PROXY_INPLACE(-=)
+BOOST_PYTHON_PROXY_INPLACE(*=)
+BOOST_PYTHON_PROXY_INPLACE(/=)
+BOOST_PYTHON_PROXY_INPLACE(%=)
+BOOST_PYTHON_PROXY_INPLACE(<<=)
+BOOST_PYTHON_PROXY_INPLACE(>>=)
+BOOST_PYTHON_PROXY_INPLACE(&=)
+BOOST_PYTHON_PROXY_INPLACE(^=)
+BOOST_PYTHON_PROXY_INPLACE(|=)
+# undef BOOST_PYTHON_PROXY_INPLACE
+
+template <class Policies>
+inline void proxy<Policies>::del() const
+{
+    Policies::del(m_target, m_key);
+}
+
+}}} // namespace boost::python::api
+
+#endif // PROXY_DWA2002615_HPP