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Added thirdparty: boost library
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Viacheslav Demydiuk
+395
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// Copyright (c) 2001-2011 Hartmut Kaiser
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//
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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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#if !defined(BOOST_SPIRIT_KARMA_STREAM_MAY_01_2007_0310PM)
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#define BOOST_SPIRIT_KARMA_STREAM_MAY_01_2007_0310PM
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#if defined(_MSC_VER)
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#pragma once
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#endif
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#include <boost/spirit/home/support/common_terminals.hpp>
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#include <boost/spirit/home/support/info.hpp>
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#include <boost/spirit/home/support/container.hpp>
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#include <boost/spirit/home/support/detail/hold_any.hpp>
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#include <boost/spirit/home/support/detail/get_encoding.hpp>
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#include <boost/spirit/home/support/detail/is_spirit_tag.hpp>
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#include <boost/spirit/home/karma/domain.hpp>
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#include <boost/spirit/home/karma/meta_compiler.hpp>
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#include <boost/spirit/home/karma/delimit_out.hpp>
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#include <boost/spirit/home/karma/auxiliary/lazy.hpp>
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#include <boost/spirit/home/karma/stream/detail/format_manip.hpp>
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#include <boost/spirit/home/karma/detail/generate_to.hpp>
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#include <boost/spirit/home/karma/detail/get_casetag.hpp>
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#include <boost/spirit/home/karma/detail/extract_from.hpp>
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#include <boost/fusion/include/at.hpp>
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#include <boost/fusion/include/vector.hpp>
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#include <boost/fusion/include/cons.hpp>
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#include <boost/core/enable_if.hpp>
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#include <boost/mpl/bool.hpp>
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#include <boost/type_traits/is_same.hpp>
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#include <ostream>
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///////////////////////////////////////////////////////////////////////////////
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namespace boost { namespace spirit
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{
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namespace tag
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{
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template <typename Char = char>
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struct stream_tag
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{
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BOOST_SPIRIT_IS_TAG()
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};
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}
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namespace karma
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{
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///////////////////////////////////////////////////////////////////////
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// This one is the class that the user can instantiate directly in
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// order to create a customized int generator
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template <typename Char = char>
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struct stream_generator
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: spirit::terminal<tag::stream_tag<Char> >
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{};
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}
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///////////////////////////////////////////////////////////////////////////
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// Enablers
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///////////////////////////////////////////////////////////////////////////
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template <>
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struct use_terminal<karma::domain, tag::stream> // enables stream
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: mpl::true_ {};
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template <>
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struct use_terminal<karma::domain, tag::wstream> // enables wstream
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: mpl::true_ {};
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template <typename A0>
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struct use_terminal<karma::domain // enables stream(...)
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, terminal_ex<tag::stream, fusion::vector1<A0> >
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> : mpl::true_ {};
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template <typename A0>
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struct use_terminal<karma::domain // enables wstream(...)
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, terminal_ex<tag::wstream, fusion::vector1<A0> >
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> : mpl::true_ {};
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template <> // enables stream(f)
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struct use_lazy_terminal<
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karma::domain, tag::stream, 1 /*arity*/
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> : mpl::true_ {};
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template <> // enables wstream(f)
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struct use_lazy_terminal<
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karma::domain, tag::wstream, 1 /*arity*/
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> : mpl::true_ {};
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// enables stream_generator<char_type>
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template <typename Char>
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struct use_terminal<karma::domain, tag::stream_tag<Char> >
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: mpl::true_ {};
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template <typename Char, typename A0>
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struct use_terminal<karma::domain
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, terminal_ex<tag::stream_tag<Char>, fusion::vector1<A0> >
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> : mpl::true_ {};
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template <typename Char>
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struct use_lazy_terminal<
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karma::domain, tag::stream_tag<Char>, 1 /*arity*/
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> : mpl::true_ {};
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}}
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///////////////////////////////////////////////////////////////////////////////
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namespace boost { namespace spirit { namespace karma
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{
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#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
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using spirit::stream;
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using spirit::wstream;
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#endif
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using spirit::stream_type;
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using spirit::wstream_type;
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namespace detail
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{
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#ifdef _MSC_VER
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# pragma warning(push)
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# pragma warning(disable: 4512) // assignment operator could not be generated.
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#endif
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template <typename OutputIterator, typename Char, typename CharEncoding
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, typename Tag>
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struct psbuf : std::basic_streambuf<Char>
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{
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psbuf(OutputIterator& sink) : sink_(sink) {}
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protected:
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typename psbuf::int_type overflow(typename psbuf::int_type ch) BOOST_OVERRIDE
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{
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if (psbuf::traits_type::eq_int_type(ch, psbuf::traits_type::eof()))
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return psbuf::traits_type::not_eof(ch);
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return detail::generate_to(sink_, psbuf::traits_type::to_char_type(ch),
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CharEncoding(), Tag()) ? ch : psbuf::traits_type::eof();
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}
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private:
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OutputIterator& sink_;
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};
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#ifdef _MSC_VER
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# pragma warning(pop)
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#endif
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}
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///////////////////////////////////////////////////////////////////////////
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template <typename Char, typename CharEncoding, typename Tag>
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struct any_stream_generator
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: primitive_generator<any_stream_generator<Char, CharEncoding, Tag> >
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{
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template <typename Context, typename Unused = unused_type>
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struct attribute
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{
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typedef spirit::basic_hold_any<Char> type;
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};
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// any_stream_generator has an attached attribute
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template <
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typename OutputIterator, typename Context, typename Delimiter
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, typename Attribute
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>
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static bool generate(OutputIterator& sink, Context& context
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, Delimiter const& d, Attribute const& attr)
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{
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if (!traits::has_optional_value(attr))
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return false;
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// use existing operator<<()
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typedef typename attribute<Context>::type attribute_type;
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{
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detail::psbuf<OutputIterator, Char, CharEncoding, Tag> pseudobuf(sink);
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std::basic_ostream<Char> ostr(&pseudobuf);
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ostr << traits::extract_from<attribute_type>(attr, context) << std::flush;
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if (!ostr.good())
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return false;
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}
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return karma::delimit_out(sink, d); // always do post-delimiting
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}
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// this is a special overload to detect if the output iterator has been
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// generated by a format_manip object.
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template <
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typename T, typename Traits, typename Properties, typename Context
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, typename Delimiter, typename Attribute
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>
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static bool generate(
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karma::detail::output_iterator<
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karma::ostream_iterator<T, Char, Traits>, Properties
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>& sink, Context& context, Delimiter const& d
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, Attribute const& attr)
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{
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typedef karma::detail::output_iterator<
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karma::ostream_iterator<T, Char, Traits>, Properties
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> output_iterator;
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if (!traits::has_optional_value(attr))
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return false;
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// use existing operator<<()
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typedef typename attribute<Context>::type attribute_type;
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{
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detail::psbuf<output_iterator, Char, CharEncoding, Tag> pseudobuf(sink);
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std::basic_ostream<Char> ostr(&pseudobuf);
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ostr.imbue(sink.get_ostream().getloc());
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ostr << traits::extract_from<attribute_type>(attr, context)
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<< std::flush;
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if (!ostr.good())
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return false;
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}
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return karma::delimit_out(sink, d); // always do post-delimiting
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}
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// this any_stream has no parameter attached, it needs to have been
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// initialized from a value/variable
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template <typename OutputIterator, typename Context
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, typename Delimiter>
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static bool
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generate(OutputIterator&, Context&, Delimiter const&, unused_type)
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{
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// It is not possible (doesn't make sense) to use stream generators
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// without providing any attribute, as the generator doesn't 'know'
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// what to output. The following assertion fires if this situation
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// is detected in your code.
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BOOST_SPIRIT_ASSERT_FAIL(OutputIterator, stream_not_usable_without_attribute, ());
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return false;
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}
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template <typename Context>
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info what(Context& /*context*/) const
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{
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return info("stream");
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}
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};
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template <typename T, typename Char, typename CharEncoding, typename Tag>
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struct lit_stream_generator
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: primitive_generator<lit_stream_generator<T, Char, CharEncoding, Tag> >
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{
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template <typename Context, typename Unused>
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struct attribute
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{
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typedef unused_type type;
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};
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lit_stream_generator(typename add_reference<T>::type t)
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: t_(t)
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{}
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// lit_stream_generator has an attached parameter
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// this overload will be used in the normal case (not called from
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// format_manip).
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template <
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typename OutputIterator, typename Context, typename Delimiter
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, typename Attribute>
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bool generate(OutputIterator& sink, Context&, Delimiter const& d
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, Attribute const&) const
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{
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detail::psbuf<OutputIterator, Char, CharEncoding, Tag> pseudobuf(sink);
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std::basic_ostream<Char> ostr(&pseudobuf);
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ostr << t_ << std::flush; // use existing operator<<()
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if (ostr.good())
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return karma::delimit_out(sink, d); // always do post-delimiting
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return false;
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}
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// this is a special overload to detect if the output iterator has been
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// generated by a format_manip object.
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template <
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typename T1, typename Traits, typename Properties
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, typename Context, typename Delimiter, typename Attribute>
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bool generate(
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karma::detail::output_iterator<
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karma::ostream_iterator<T1, Char, Traits>, Properties
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>& sink, Context&, Delimiter const& d, Attribute const&) const
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{
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typedef karma::detail::output_iterator<
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karma::ostream_iterator<T1, Char, Traits>, Properties
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> output_iterator;
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{
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detail::psbuf<output_iterator, Char, CharEncoding, Tag> pseudobuf(sink);
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std::basic_ostream<Char> ostr(&pseudobuf);
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ostr.imbue(sink.get_ostream().getloc());
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ostr << t_ << std::flush; // use existing operator<<()
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if (!ostr.good())
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return false;
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}
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return karma::delimit_out(sink, d); // always do post-delimiting
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}
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template <typename Context>
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info what(Context& /*context*/) const
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{
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return info("any-stream");
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}
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T t_;
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};
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///////////////////////////////////////////////////////////////////////////
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// Generator generators: make_xxx function (objects)
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///////////////////////////////////////////////////////////////////////////
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template <typename Char, typename Modifiers>
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struct make_stream
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{
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static bool const lower =
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has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value;
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static bool const upper =
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has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value;
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typedef any_stream_generator<
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Char
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, typename spirit::detail::get_encoding_with_case<
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Modifiers, unused_type, lower || upper>::type
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, typename detail::get_casetag<Modifiers, lower || upper>::type
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> result_type;
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result_type operator()(unused_type, unused_type) const
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{
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return result_type();
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}
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};
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// stream
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template <typename Modifiers>
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struct make_primitive<tag::stream, Modifiers>
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: make_stream<char, Modifiers> {};
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// wstream
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template <typename Modifiers>
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struct make_primitive<tag::wstream, Modifiers>
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: make_stream<wchar_t, Modifiers> {};
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// any_stream_generator<char_type>
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template <typename Char, typename Modifiers>
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struct make_primitive<tag::stream_tag<Char>, Modifiers>
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: make_stream<Char, Modifiers> {};
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///////////////////////////////////////////////////////////////////////////
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template <typename Char, typename A0, typename Modifiers>
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struct make_any_stream
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{
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static bool const lower =
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has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value;
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static bool const upper =
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has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value;
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typedef typename add_const<A0>::type const_attribute;
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typedef lit_stream_generator<
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const_attribute, Char
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, typename spirit::detail::get_encoding_with_case<
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Modifiers, unused_type, lower || upper>::type
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, typename detail::get_casetag<Modifiers, lower || upper>::type
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> result_type;
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template <typename Terminal>
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result_type operator()(Terminal const& term, unused_type) const
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{
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return result_type(fusion::at_c<0>(term.args));
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}
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};
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// stream(...)
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template <typename Modifiers, typename A0>
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struct make_primitive<
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terminal_ex<tag::stream, fusion::vector1<A0> >, Modifiers>
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: make_any_stream<char, A0, Modifiers> {};
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// wstream(...)
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template <typename Modifiers, typename A0>
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struct make_primitive<
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terminal_ex<tag::wstream, fusion::vector1<A0> >, Modifiers>
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: make_any_stream<wchar_t, A0, Modifiers> {};
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// any_stream_generator<char_type>(...)
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template <typename Char, typename Modifiers, typename A0>
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struct make_primitive<
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terminal_ex<tag::stream_tag<Char>, fusion::vector1<A0> >
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, Modifiers>
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: make_any_stream<Char, A0, Modifiers> {};
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}}}
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#endif
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