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///////////////////////////////////////////////////////////////////////////////
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// accumulator_base.hpp
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//
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//  Copyright 2005 Eric Niebler. Distributed under the Boost
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//  Software License, Version 1.0. (See accompanying file
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//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_ACCUMULATORS_FRAMEWORK_ACCUMULATORS_BASE_HPP_EAN_28_10_2005
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#define BOOST_ACCUMULATORS_FRAMEWORK_ACCUMULATORS_BASE_HPP_EAN_28_10_2005
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#include <boost/mpl/placeholders.hpp>
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#include <boost/mpl/joint_view.hpp>
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#include <boost/mpl/single_view.hpp>
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#include <boost/mpl/fold.hpp>
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#include <boost/mpl/contains.hpp>
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#include <boost/mpl/empty_sequence.hpp>
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#include <boost/accumulators/framework/accumulator_concept.hpp>
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namespace boost { namespace accumulators
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{
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namespace detail
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{
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    typedef void void_;
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}
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///////////////////////////////////////////////////////////////////////////////
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// dont_care
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//
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struct dont_care
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{
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    template<typename Args>
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    dont_care(Args const &)
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    {
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    }
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};
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///////////////////////////////////////////////////////////////////////////////
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// accumulator_base
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//
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struct accumulator_base
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{
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    // hidden if defined in derived classes
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    detail::void_ operator ()(dont_care)
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    {
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    }
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    typedef mpl::false_ is_droppable;
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    detail::void_ add_ref(dont_care)
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    {
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    }
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    detail::void_ drop(dont_care)
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    {
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    }
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    detail::void_ on_drop(dont_care)
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    {
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    }
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};
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}} // namespace boost::accumulators
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#endif