2 #if !defined(BOOST_PP_IS_ITERATING)
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6 #ifndef BOOST_MPL_PLACEHOLDERS_HPP_INCLUDED
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7 #define BOOST_MPL_PLACEHOLDERS_HPP_INCLUDED
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9 // Copyright Aleksey Gurtovoy 2001-2004
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10 // Copyright Peter Dimov 2001-2003
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12 // Distributed under the Boost Software License, Version 1.0.
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13 // (See accompanying file LICENSE_1_0.txt or copy at
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14 // http://www.boost.org/LICENSE_1_0.txt)
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16 // See http://www.boost.org/libs/mpl for documentation.
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18 // $Id: placeholders.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
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19 // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $
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20 // $Revision: 49267 $
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23 #if !defined(BOOST_MPL_PREPROCESSING_MODE)
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24 # include <boost/mpl/arg.hpp>
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25 # include <boost/mpl/aux_/adl_barrier.hpp>
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27 # if !defined(BOOST_MPL_CFG_NO_ADL_BARRIER_NAMESPACE)
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28 # define BOOST_MPL_AUX_ARG_ADL_BARRIER_DECL(type) \
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29 using ::BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE::type; \
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32 # define BOOST_MPL_AUX_ARG_ADL_BARRIER_DECL(type) /**/
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37 #include <boost/mpl/aux_/config/use_preprocessed.hpp>
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39 #if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \
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40 && !defined(BOOST_MPL_PREPROCESSING_MODE)
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42 # define BOOST_MPL_PREPROCESSED_HEADER placeholders.hpp
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43 # include <boost/mpl/aux_/include_preprocessed.hpp>
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47 # include <boost/mpl/aux_/nttp_decl.hpp>
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48 # include <boost/mpl/limits/arity.hpp>
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49 # include <boost/preprocessor/iterate.hpp>
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50 # include <boost/preprocessor/cat.hpp>
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52 // watch out for GNU gettext users, who #define _(x)
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53 #if !defined(_) || defined(BOOST_MPL_CFG_NO_UNNAMED_PLACEHOLDER_SUPPORT)
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54 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN
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56 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE
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58 namespace boost { namespace mpl {
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60 BOOST_MPL_AUX_ARG_ADL_BARRIER_DECL(_)
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62 namespace placeholders {
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63 using BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE::_;
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69 /// agurt, 17/mar/02: one more placeholder for the last 'apply#'
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71 #define BOOST_PP_ITERATION_PARAMS_1 \
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72 (3,(1, BOOST_MPL_LIMIT_METAFUNCTION_ARITY + 1, <boost/mpl/placeholders.hpp>))
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73 #include BOOST_PP_ITERATE()
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75 #endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS
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76 #endif // BOOST_MPL_PLACEHOLDERS_HPP_INCLUDED
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81 #define i_ BOOST_PP_FRAME_ITERATION(1)
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83 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN
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85 typedef arg<i_> BOOST_PP_CAT(_,i_);
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87 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE
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89 namespace boost { namespace mpl {
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91 BOOST_MPL_AUX_ARG_ADL_BARRIER_DECL(BOOST_PP_CAT(_,i_))
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93 namespace placeholders {
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94 using BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE::BOOST_PP_CAT(_,i_);
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100 #endif // BOOST_PP_IS_ITERATING
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