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1 // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
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2 // (C) Copyright 2003-2007 Jonathan Turkanis
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3 // Distributed under the Boost Software License, Version 1.0. (See accompanying
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4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
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5
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6 // See http://www.boost.org/libs/iostreams for documentation.
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7
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8 #ifndef BOOST_IOSTREAMS_OUTPUT_SEQUENCE_HPP_INCLUDED
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9 #define BOOST_IOSTREAMS_OUTPUT_SEQUENCE_HPP_INCLUDED
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10
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11 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
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12 # pragma once
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13 #endif
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14
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15 #include <utility> // pair.
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16 #include <boost/config.hpp> // DEDUCED_TYPENAME, MSVC.
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17 #include <boost/detail/workaround.hpp>
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18 #include <boost/iostreams/detail/wrap_unwrap.hpp>
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19 #include <boost/iostreams/operations_fwd.hpp> // is_custom
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20 #include <boost/iostreams/traits.hpp>
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21 #include <boost/mpl/if.hpp>
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22
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23 // Must come last.
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24 #include <boost/iostreams/detail/config/disable_warnings.hpp>
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25
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26 namespace boost { namespace iostreams {
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27
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28 namespace detail {
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29
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30 template<typename T>
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31 struct output_sequence_impl;
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32
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33 } // End namespace detail.
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34
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35 template<typename T>
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36 inline std::pair<
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37 BOOST_DEDUCED_TYPENAME char_type_of<T>::type*,
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38 BOOST_DEDUCED_TYPENAME char_type_of<T>::type*
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39 >
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40 output_sequence(T& t)
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41 { return detail::output_sequence_impl<T>::output_sequence(t); }
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42
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43 namespace detail {
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44
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45 //------------------Definition of output_sequence_impl------------------------//
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46
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47 template<typename T>
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48 struct output_sequence_impl
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49 : mpl::if_<
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50 detail::is_custom<T>,
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51 operations<T>,
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52 output_sequence_impl<direct_tag>
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53 >::type
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54 { };
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55
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56 template<>
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57 struct output_sequence_impl<direct_tag> {
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58 template<typename U>
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59 static std::pair<
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60 BOOST_DEDUCED_TYPENAME char_type_of<U>::type*,
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61 BOOST_DEDUCED_TYPENAME char_type_of<U>::type*
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62 >
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63 output_sequence(U& u) { return u.output_sequence(); }
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64 };
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65
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66 } // End namespace detail.
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67
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68 } } // End namespaces iostreams, boost.
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69
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70 #include <boost/iostreams/detail/config/enable_warnings.hpp>
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71
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72 #endif // #ifndef BOOST_IOSTREAMS_OUTPUT_SEQUENCE_HPP_INCLUDED
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