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