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1
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2 #ifndef BOOST_MPL_AUX_CONTAINS_IMPL_HPP_INCLUDED
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3 #define BOOST_MPL_AUX_CONTAINS_IMPL_HPP_INCLUDED
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4
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5 // Copyright Eric Friedman 2002
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6 // Copyright Aleksey Gurtovoy 2004
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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/contains_fwd.hpp>
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19 #include <boost/mpl/begin_end.hpp>
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20 #include <boost/mpl/find.hpp>
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21 #include <boost/mpl/not.hpp>
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22 #include <boost/mpl/aux_/traits_lambda_spec.hpp>
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23 #include <boost/mpl/aux_/config/forwarding.hpp>
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24 #include <boost/mpl/aux_/config/static_constant.hpp>
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25
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26 #include <boost/type_traits/is_same.hpp>
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27
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28 namespace boost { namespace mpl {
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29
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30 template< typename Tag >
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31 struct contains_impl
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32 {
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33 template< typename Sequence, typename T > struct apply
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34 #if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING)
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35 : not_< is_same<
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36 typename find<Sequence,T>::type
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37 , typename end<Sequence>::type
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38 > >
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39 {
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40 #else
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41 {
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42 typedef not_< is_same<
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43 typename find<Sequence,T>::type
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44 , typename end<Sequence>::type
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45 > > type;
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46
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47 BOOST_STATIC_CONSTANT(bool, value =
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48 (not_< is_same<
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49 typename find<Sequence,T>::type
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50 , typename end<Sequence>::type
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51 > >::value)
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52 );
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53 #endif
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54 };
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55 };
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56
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57 BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(2,contains_impl)
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58
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59 }}
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60
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61 #endif // BOOST_MPL_AUX_CONTAINS_IMPL_HPP_INCLUDED
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