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73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
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// (C) Copyright 2003-2007 Jonathan Turkanis
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
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// See http://www.boost.org/libs/iostreams for documentation.
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#ifndef BOOST_IOSTREAMS_INPUT_SEQUENCE_HPP_INCLUDED
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#define BOOST_IOSTREAMS_INPUT_SEQUENCE_HPP_INCLUDED
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#if defined(_MSC_VER) && (_MSC_VER >= 1020)
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# pragma once
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#endif
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#include <utility> // pair.
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#include <boost/config.hpp> // DEDUCED_TYPENAME, MSVC.
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#include <boost/detail/workaround.hpp>
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#include <boost/iostreams/detail/wrap_unwrap.hpp>
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#include <boost/iostreams/operations_fwd.hpp> // is_custom
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#include <boost/iostreams/traits.hpp>
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#include <boost/mpl/if.hpp>
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// Must come last.
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#include <boost/iostreams/detail/config/disable_warnings.hpp>
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namespace boost { namespace iostreams {
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namespace detail {
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template<typename T>
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struct input_sequence_impl;
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} // End namespace detail.
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template<typename T>
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inline std::pair<
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BOOST_DEDUCED_TYPENAME char_type_of<T>::type*,
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BOOST_DEDUCED_TYPENAME char_type_of<T>::type*
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>
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input_sequence(T& t)
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{ return detail::input_sequence_impl<T>::input_sequence(t); }
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namespace detail {
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//------------------Definition of direct_impl-------------------------------//
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template<typename T>
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struct input_sequence_impl
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: mpl::if_<
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detail::is_custom<T>,
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operations<T>,
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input_sequence_impl<direct_tag>
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>::type
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{ };
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template<>
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struct input_sequence_impl<direct_tag> {
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template<typename U>
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static std::pair<
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BOOST_DEDUCED_TYPENAME char_type_of<U>::type*,
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BOOST_DEDUCED_TYPENAME char_type_of<U>::type*
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>
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input_sequence(U& u) { return u.input_sequence(); }
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};
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} // End namespace detail.
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} } // End namespaces iostreams, boost.
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#include <boost/iostreams/detail/config/enable_warnings.hpp>
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#endif // #ifndef BOOST_IOSTREAMS_INPUT_SEQUENCE_HPP_INCLUDED
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