forked from boostorg/smart_ptr
58 lines
1.4 KiB
C++
58 lines
1.4 KiB
C++
#ifndef BOOST_SMART_PTR_OWNER_LESS_HPP_INCLUDED
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#define BOOST_SMART_PTR_OWNER_LESS_HPP_INCLUDED
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//
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// owner_less.hpp
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//
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// Copyright (c) 2008 Frank Mori Hess
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//
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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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//
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// See http://www.boost.org/libs/smart_ptr/smart_ptr.htm for documentation.
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//
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#include <functional>
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namespace boost
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{
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template<typename T> class shared_ptr;
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template<typename T> class weak_ptr;
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namespace detail
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{
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template<typename T, typename U>
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struct generic_owner_less : public std::binary_function<T, T, bool>
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{
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bool operator()(const T &lhs, const T &rhs) const
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{
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return lhs.owner_before(rhs);
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}
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bool operator()(const T &lhs, const U &rhs) const
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{
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return lhs.owner_before(rhs);
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}
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bool operator()(const U &lhs, const T &rhs) const
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{
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return lhs.owner_before(rhs);
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}
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};
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} // namespace detail
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template<typename T> struct owner_less;
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template<typename T>
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struct owner_less<shared_ptr<T> >:
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public detail::generic_owner_less<shared_ptr<T>, weak_ptr<T> >
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{};
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template<typename T>
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struct owner_less<weak_ptr<T> >:
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public detail::generic_owner_less<weak_ptr<T>, shared_ptr<T> >
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{};
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} // namespace boost
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#endif // #ifndef BOOST_SMART_PTR_OWNER_LESS_HPP_INCLUDED
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