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97 lines
2.6 KiB
97 lines
2.6 KiB
// Copyright David Abrahams 2002. |
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// Distributed under the Boost Software License, Version 1.0. (See |
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// accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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#ifndef PROXY_DWA2002615_HPP |
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# define PROXY_DWA2002615_HPP |
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# include <boost/python/detail/prefix.hpp> |
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# include <boost/python/object_core.hpp> |
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# include <boost/python/object_operators.hpp> |
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namespace boost { namespace python { namespace api { |
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template <class Policies> |
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class proxy : public object_operators<proxy<Policies> > |
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{ |
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typedef typename Policies::key_type key_type; |
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typedef proxy const& assignment_self; |
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public: |
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proxy(object const& target, key_type const& key); |
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operator object() const; |
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// to support a[b] = c[d] |
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proxy const& operator=(assignment_self) const; |
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template <class T> |
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inline proxy const& operator=(T const& rhs) const |
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{ |
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Policies::set(m_target, m_key, object(rhs)); |
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return *this; |
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} |
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public: // implementation detail |
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void del() const; |
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private: |
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object m_target; |
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key_type m_key; |
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}; |
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template <class T> |
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inline void del(proxy<T> const& x) |
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{ |
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x.del(); |
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} |
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// |
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// implementation |
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// |
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template <class Policies> |
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inline proxy<Policies>::proxy(object const& target, key_type const& key) |
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: m_target(target), m_key(key) |
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{} |
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template <class Policies> |
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inline proxy<Policies>::operator object() const |
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{ |
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return Policies::get(m_target, m_key); |
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} |
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// to support a[b] = c[d] |
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template <class Policies> |
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inline proxy<Policies> const& proxy<Policies>::operator=(typename proxy::assignment_self rhs) const |
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{ |
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return *this = python::object(rhs); |
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} |
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# define BOOST_PYTHON_PROXY_INPLACE(op) \ |
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template <class Policies, class R> \ |
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proxy<Policies> const& operator op(proxy<Policies> const& lhs, R const& rhs) \ |
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{ \ |
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object old(lhs); \ |
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return lhs = (old op rhs); \ |
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} |
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BOOST_PYTHON_PROXY_INPLACE(+=) |
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BOOST_PYTHON_PROXY_INPLACE(-=) |
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BOOST_PYTHON_PROXY_INPLACE(*=) |
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BOOST_PYTHON_PROXY_INPLACE(/=) |
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BOOST_PYTHON_PROXY_INPLACE(%=) |
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BOOST_PYTHON_PROXY_INPLACE(<<=) |
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BOOST_PYTHON_PROXY_INPLACE(>>=) |
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BOOST_PYTHON_PROXY_INPLACE(&=) |
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BOOST_PYTHON_PROXY_INPLACE(^=) |
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BOOST_PYTHON_PROXY_INPLACE(|=) |
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# undef BOOST_PYTHON_PROXY_INPLACE |
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template <class Policies> |
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inline void proxy<Policies>::del() const |
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{ |
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Policies::del(m_target, m_key); |
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} |
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}}} // namespace boost::python::api |
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#endif // PROXY_DWA2002615_HPP
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