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