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Diffstat (limited to 'src/third_party/boost-1.70.0/boost/iostreams/traits.hpp')
| -rw-r--r-- | src/third_party/boost-1.70.0/boost/iostreams/traits.hpp | 363 |
1 files changed, 363 insertions, 0 deletions
diff --git a/src/third_party/boost-1.70.0/boost/iostreams/traits.hpp b/src/third_party/boost-1.70.0/boost/iostreams/traits.hpp new file mode 100644 index 00000000000..f8d7a3ff5b8 --- /dev/null +++ b/src/third_party/boost-1.70.0/boost/iostreams/traits.hpp @@ -0,0 +1,363 @@ +// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com) +// (C) Copyright 2003-2007 Jonathan Turkanis +// Distributed under the Boost Software License, Version 1.0. (See accompanying +// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.) + +// See http://www.boost.org/libs/iostreams for documentation. + +// +// Contains metafunctions char_type_of, category_of and mode_of used for +// deducing the i/o category and i/o mode of a model of Filter or Device. +// +// Also contains several utility metafunctions, functions and macros. +// + +#ifndef BOOST_IOSTREAMS_IO_TRAITS_HPP_INCLUDED +#define BOOST_IOSTREAMS_IO_TRAITS_HPP_INCLUDED + +#if defined(_MSC_VER) +# pragma once +#endif + +#include <iosfwd> // stream types, char_traits. +#include <boost/config.hpp> // partial spec, deduced typename. +#include <boost/detail/workaround.hpp> +#include <boost/iostreams/categories.hpp> +#include <boost/iostreams/detail/bool_trait_def.hpp> +#include <boost/iostreams/detail/config/wide_streams.hpp> +#include <boost/iostreams/detail/is_iterator_range.hpp> +#include <boost/iostreams/detail/select.hpp> +#include <boost/iostreams/detail/select_by_size.hpp> +#include <boost/iostreams/detail/wrap_unwrap.hpp> +#include <boost/iostreams/traits_fwd.hpp> +#include <boost/mpl/bool.hpp> +#include <boost/mpl/eval_if.hpp> +#include <boost/mpl/identity.hpp> +#include <boost/mpl/int.hpp> +#include <boost/mpl/or.hpp> +#include <boost/range/iterator_range.hpp> +#include <boost/range/value_type.hpp> +#include <boost/ref.hpp> +#include <boost/type_traits/is_convertible.hpp> + +// Must come last. +#include <boost/iostreams/detail/config/disable_warnings.hpp> + +namespace boost { namespace iostreams { + +//----------Definitions of predicates for streams and stream buffers----------// + +#ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //--------------------------------// + +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_istream, std::basic_istream, 2) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_ostream, std::basic_ostream, 2) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_iostream, std::basic_iostream, 2) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_streambuf, std::basic_streambuf, 2) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_ifstream, std::basic_ifstream, 2) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_ofstream, std::basic_ofstream, 2) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_fstream, std::basic_fstream, 2) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_filebuf, std::basic_filebuf, 2) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_istringstream, std::basic_istringstream, 3) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_ostringstream, std::basic_ostringstream, 3) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_stringstream, std::basic_stringstream, 3) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_stringbuf, std::basic_stringbuf, 3) + +#else // #ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //-----------------------// + +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_istream, std::istream, 0) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_ostream, std::ostream, 0) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_iostream, std::iostream, 0) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_streambuf, std::streambuf, 0) + +#endif // #ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //----------------------// + +template<typename T> +struct is_std_io + : mpl::or_< is_istream<T>, is_ostream<T>, is_streambuf<T> > + { }; + +template<typename T> +struct is_std_file_device + : mpl::or_< + is_ifstream<T>, + is_ofstream<T>, + is_fstream<T>, + is_filebuf<T> + > + { }; + +template<typename T> +struct is_std_string_device + : mpl::or_< + is_istringstream<T>, + is_ostringstream<T>, + is_stringstream<T>, + is_stringbuf<T> + > + { }; + +template<typename Device, typename Tr, typename Alloc> +struct stream; + +template<typename T, typename Tr, typename Alloc, typename Mode> +class stream_buffer; + +template< typename Mode, typename Ch, typename Tr, + typename Alloc, typename Access > +class filtering_stream; + +template< typename Mode, typename Ch, typename Tr, + typename Alloc, typename Access > +class wfiltering_stream; + +template< typename Mode, typename Ch, typename Tr, + typename Alloc, typename Access > +class filtering_streambuf; + +template< typename Mode, typename Ch, typename Tr, + typename Alloc, typename Access > +class filtering_wstreambuf; + +namespace detail { + +template<typename T, typename Tr> +class linked_streambuf; + +BOOST_IOSTREAMS_BOOL_TRAIT_DEF( is_boost_stream, + boost::iostreams::stream, + 3 ) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF( is_boost_stream_buffer, + boost::iostreams::stream_buffer, + 4 ) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF( is_filtering_stream_impl, + boost::iostreams::filtering_stream, + 5 ) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF( is_filtering_wstream_impl, + boost::iostreams::wfiltering_stream, + 5 ) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF( is_filtering_streambuf_impl, + boost::iostreams::filtering_streambuf, + 5 ) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF( is_filtering_wstreambuf_impl, + boost::iostreams::filtering_wstreambuf, + 5 ) +BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_linked, linked_streambuf, 2) + +template<typename T> +struct is_filtering_stream + : mpl::or_< + is_filtering_stream_impl<T>, + is_filtering_wstream_impl<T> + > + { }; + +template<typename T> +struct is_filtering_streambuf + : mpl::or_< + is_filtering_streambuf_impl<T>, + is_filtering_wstreambuf_impl<T> + > + { }; + +template<typename T> +struct is_boost + : mpl::or_< + is_boost_stream<T>, + is_boost_stream_buffer<T>, + is_filtering_stream<T>, + is_filtering_streambuf<T> + > + { }; + +} // End namespace detail. + +//------------------Definitions of char_type_of-------------------------------// + +namespace detail { + +template<typename T> +struct member_char_type { typedef typename T::char_type type; }; + +} // End namespace detail. + +# ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //-------------------------------// + +template<typename T> +struct char_type_of + : detail::member_char_type< + typename detail::unwrapped_type<T>::type + > + { }; + +# else // # ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //---------------------// + +template<typename T> +struct char_type_of { + typedef typename detail::unwrapped_type<T>::type U; + typedef typename + mpl::eval_if< + is_std_io<U>, + mpl::identity<char>, + detail::member_char_type<U> + >::type type; +}; + +# endif // # ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //--------------------// + +template<typename Iter> +struct char_type_of< iterator_range<Iter> > { + typedef typename iterator_value<Iter>::type type; +}; + + +//------------------Definitions of category_of--------------------------------// + +namespace detail { + +template<typename T> +struct member_category { typedef typename T::category type; }; + +} // End namespace detail. + +template<typename T> +struct category_of { + template<typename U> + struct member_category { + typedef typename U::category type; + }; + typedef typename detail::unwrapped_type<T>::type U; + typedef typename + mpl::eval_if< + mpl::and_< + is_std_io<U>, + mpl::not_< detail::is_boost<U> > + >, + iostreams::select< // Disambiguation for Tru64 + is_filebuf<U>, filebuf_tag, + is_ifstream<U>, ifstream_tag, + is_ofstream<U>, ofstream_tag, + is_fstream<U>, fstream_tag, + is_stringbuf<U>, stringbuf_tag, + is_istringstream<U>, istringstream_tag, + is_ostringstream<U>, ostringstream_tag, + is_stringstream<U>, stringstream_tag, + is_streambuf<U>, generic_streambuf_tag, + is_iostream<U>, generic_iostream_tag, + is_istream<U>, generic_istream_tag, + is_ostream<U>, generic_ostream_tag + >, + detail::member_category<U> + >::type type; +}; + +// Partial specialization for reference wrappers + +template<typename T> +struct category_of< reference_wrapper<T> > + : category_of<T> + { }; + + +//------------------Definition of get_category--------------------------------// + +// +// Returns an object of type category_of<T>::type. +// +template<typename T> +inline typename category_of<T>::type get_category(const T&) +{ typedef typename category_of<T>::type category; return category(); } + +//------------------Definition of int_type_of---------------------------------// + +template<typename T> +struct int_type_of { +#ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES + typedef std::char_traits< + BOOST_DEDUCED_TYPENAME char_type_of<T>::type + > traits_type; + typedef typename traits_type::int_type type; +#else + typedef int type; +#endif +}; + +//------------------Definition of mode_of-------------------------------------// + +namespace detail { + +template<int N> struct io_mode_impl; + +#define BOOST_IOSTREAMS_MODE_HELPER(tag_, id_) \ + case_<id_> io_mode_impl_helper(tag_); \ + template<> struct io_mode_impl<id_> { typedef tag_ type; }; \ + /**/ +BOOST_IOSTREAMS_MODE_HELPER(input, 1) +BOOST_IOSTREAMS_MODE_HELPER(output, 2) +BOOST_IOSTREAMS_MODE_HELPER(bidirectional, 3) +BOOST_IOSTREAMS_MODE_HELPER(input_seekable, 4) +BOOST_IOSTREAMS_MODE_HELPER(output_seekable, 5) +BOOST_IOSTREAMS_MODE_HELPER(seekable, 6) +BOOST_IOSTREAMS_MODE_HELPER(dual_seekable, 7) +BOOST_IOSTREAMS_MODE_HELPER(bidirectional_seekable, 8) +BOOST_IOSTREAMS_MODE_HELPER(dual_use, 9) +#undef BOOST_IOSTREAMS_MODE_HELPER + +template<typename T> +struct io_mode_id { + typedef typename category_of<T>::type category; + BOOST_SELECT_BY_SIZE(int, value, detail::io_mode_impl_helper(category())); +}; + +} // End namespace detail. + +template<typename T> // Borland 5.6.4 requires this circumlocution. +struct mode_of : detail::io_mode_impl< detail::io_mode_id<T>::value > { }; + +// Partial specialization for reference wrappers + +template<typename T> +struct mode_of< reference_wrapper<T> > + : mode_of<T> + { }; + + +//------------------Definition of is_device, is_filter and is_direct----------// + +namespace detail { + +template<typename T, typename Tag> +struct has_trait_impl { + typedef typename category_of<T>::type category; + BOOST_STATIC_CONSTANT(bool, value = (is_convertible<category, Tag>::value)); +}; + +template<typename T, typename Tag> +struct has_trait + : mpl::bool_<has_trait_impl<T, Tag>::value> + { }; + +} // End namespace detail. + +template<typename T> +struct is_device : detail::has_trait<T, device_tag> { }; + +template<typename T> +struct is_filter : detail::has_trait<T, filter_tag> { }; + +template<typename T> +struct is_direct : detail::has_trait<T, direct_tag> { }; + +//------------------Definition of BOOST_IOSTREAMS_STREAMBUF_TYPEDEFS----------// + +#define BOOST_IOSTREAMS_STREAMBUF_TYPEDEFS(Tr) \ + typedef Tr traits_type; \ + typedef typename traits_type::int_type int_type; \ + typedef typename traits_type::off_type off_type; \ + typedef typename traits_type::pos_type pos_type; \ + /**/ + +} } // End namespaces iostreams, boost. + +#include <boost/iostreams/detail/config/enable_warnings.hpp> + +#endif // #ifndef BOOST_IOSTREAMS_IO_TRAITS_HPP_INCLUDED |