| // 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 |