// 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