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// MS compatible compilers support #pragma once
#if defined(_MSC_VER)
# pragma once

// tracking_enum.hpp:

// (C) Copyright 2002 Robert Ramey - . 
// Use, modification and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at

//  See 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 level
enum 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