| 1234567891011121314151617181920212223242526272829303132333435363738394041 | #ifndef BOOST_SERIALIZATION_TRACKING_ENUM_HPP#define BOOST_SERIALIZATION_TRACKING_ENUM_HPP// MS compatible compilers support #pragma once#if defined(_MSC_VER)# pragma once#endif/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8// tracking_enum.hpp:// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .// Use, modification and distribution is subject to 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 for updates, documentation, and revision history.namespace boost {namespace serialization {// addresses of serialized objects may be tracked to avoid saving/loading// redundant copies.  This header defines a class trait that can be used// to specify when objects should be tracked// names for each tracking levelenum tracking_type{    // never track this type    track_never = 0,    // track objects of this type if the object is serialized through a    // pointer.    track_selectively = 1,    // always track this type    track_always = 2};} // namespace serialization} // namespace boost#endif // BOOST_SERIALIZATION_TRACKING_ENUM_HPP
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