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1 /*=============================================================================
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2 Copyright (c) 2009 Hartmut Kaiser
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3
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4 Distributed under the Boost Software License, Version 1.0. (See accompanying
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5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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6 ==============================================================================*/
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7
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8 #ifndef BOOST_PP_IS_ITERATING
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9
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10 #if !defined(BOOST_FUSION_NVIEW_IMPL_SEP_23_2009_1017PM)
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11 #define BOOST_FUSION_NVIEW_IMPL_SEP_23_2009_1017PM
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12
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13 #include <climits>
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14 #include <boost/preprocessor/cat.hpp>
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15 #include <boost/preprocessor/repeat.hpp>
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16 #include <boost/preprocessor/iterate.hpp>
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17 #include <boost/preprocessor/repetition/enum_params.hpp>
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18 #include <boost/preprocessor/repetition/enum_binary_params.hpp>
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19 #include <boost/preprocessor/repetition/enum_params_with_a_default.hpp>
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20
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21 #define BOOST_PP_ITERATION_PARAMS_1 \
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22 (3, (1, FUSION_MAX_VECTOR_SIZE, \
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23 "boost/fusion/view/nview/detail/nview_impl.hpp")) \
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24 /**/
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25
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26 ///////////////////////////////////////////////////////////////////////////////
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27 namespace boost { namespace fusion { namespace result_of
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28 {
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29 template <typename Sequence
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30 , BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT(FUSION_MAX_VECTOR_SIZE, int I, INT_MAX)>
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31 struct as_nview
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32 {
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33 typedef mpl::vector_c<
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34 int, BOOST_PP_ENUM_PARAMS(FUSION_MAX_VECTOR_SIZE, I)
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35 > index_type;
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36 typedef nview<Sequence, index_type> type;
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37 };
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38 }}}
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39
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40 #include BOOST_PP_ITERATE()
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41
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42 #endif
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43
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44 ///////////////////////////////////////////////////////////////////////////////
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45 // Preprocessor vertical repetition code
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46 ///////////////////////////////////////////////////////////////////////////////
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47 #else // defined(BOOST_PP_IS_ITERATING)
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48
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49 #define N BOOST_PP_ITERATION()
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50
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51 #if N < FUSION_MAX_VECTOR_SIZE
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52 namespace boost { namespace fusion { namespace result_of
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53 {
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54 template <typename Sequence, BOOST_PP_ENUM_PARAMS(N, int I)>
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55 struct as_nview<Sequence, BOOST_PP_ENUM_PARAMS(N, I)>
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56 {
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57 typedef mpl::vector_c<int, BOOST_PP_ENUM_PARAMS(N, I)> index_type;
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58 typedef nview<Sequence, index_type> type;
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59 };
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60 }}}
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61 #endif
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62
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63 namespace boost { namespace fusion
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64 {
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65 template<BOOST_PP_ENUM_PARAMS(N, int I), typename Sequence>
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66 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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67 inline nview<Sequence, mpl::vector_c<int, BOOST_PP_ENUM_PARAMS(N, I)> >
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68 as_nview(Sequence& s)
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69 {
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70 typedef mpl::vector_c<int, BOOST_PP_ENUM_PARAMS(N, I)> index_type;
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71 return nview<Sequence, index_type>(s);
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72 }
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73
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74 }}
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75
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76 #undef N
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77
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78 #endif
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