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1
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2 #ifndef BOOST_MPL_FOLD_HPP_INCLUDED
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3 #define BOOST_MPL_FOLD_HPP_INCLUDED
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4
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5 // Copyright Aleksey Gurtovoy 2001-2004
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6 // Copyright David Abrahams 2001-2002
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7 //
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8 // Distributed under the Boost Software License, Version 1.0.
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9 // (See accompanying file LICENSE_1_0.txt or copy at
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10 // http://www.boost.org/LICENSE_1_0.txt)
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11 //
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12 // See http://www.boost.org/libs/mpl for documentation.
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13
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14 // $Id$
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15 // $Date$
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16 // $Revision$
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17
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18 #include <boost/mpl/begin_end.hpp>
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19 #include <boost/mpl/O1_size.hpp>
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20 #include <boost/mpl/aux_/fold_impl.hpp>
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21 #include <boost/mpl/aux_/na_spec.hpp>
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22 #include <boost/mpl/aux_/lambda_support.hpp>
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23
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24 namespace boost { namespace mpl {
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25
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26 template<
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27 typename BOOST_MPL_AUX_NA_PARAM(Sequence)
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28 , typename BOOST_MPL_AUX_NA_PARAM(State)
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29 , typename BOOST_MPL_AUX_NA_PARAM(ForwardOp)
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30 >
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31 struct fold
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32 {
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33 typedef typename aux::fold_impl<
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34 ::boost::mpl::O1_size<Sequence>::value
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35 , typename begin<Sequence>::type
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36 , typename end<Sequence>::type
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37 , State
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38 , ForwardOp
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39 >::state type;
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40
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41 BOOST_MPL_AUX_LAMBDA_SUPPORT(3,fold,(Sequence,State,ForwardOp))
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42 };
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43
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44 BOOST_MPL_AUX_NA_SPEC(3, fold)
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45
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46 }}
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47
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48 #endif // BOOST_MPL_FOLD_HPP_INCLUDED
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