karma/detail/generate_to.hpp

0001 //  Copyright (c) 2001-2011 Hartmut Kaiser
0002 //
0003 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
0004 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0005
0006 #if !defined(BOOST_SPIRIT_KARMA_DETAIL_GENERATE_TO_FEB_20_2007_0417PM)
0007 #define BOOST_SPIRIT_KARMA_DETAIL_GENERATE_TO_FEB_20_2007_0417PM
0008
0009 #if defined(_MSC_VER)
0010 #pragma once
0011 #endif
0012
0013 #include <boost/spirit/home/support/unused.hpp>
0014 #include <boost/spirit/home/support/char_class.hpp>
0015 #include <boost/spirit/home/karma/detail/output_iterator.hpp>
0016
0017 namespace boost { namespace spirit { namespace karma { namespace detail
0018 {
0019     ///////////////////////////////////////////////////////////////////////////
0020     //  These utility functions insert the given parameter into the supplied
0021     //  output iterator.
0022     //  If the attribute is spirit's unused_type, this is a no_op.
0023     ///////////////////////////////////////////////////////////////////////////
0024     template <
0025         typename OutputIterator, typename Attribute, typename CharEncoding
0026       , typename Tag>
0027     inline bool
0028     generate_to(OutputIterator& sink, Attribute const& p, CharEncoding, Tag)
0029     {
0030         *sink = spirit::char_class::convert<CharEncoding>::to(Tag(), p);
0031         ++sink;
0032         return detail::sink_is_good(sink);
0033     }
0034
0035     template <typename OutputIterator, typename Attribute>
0036     inline bool
0037     generate_to(OutputIterator& sink, Attribute const& p, unused_type, unused_type)
0038     {
0039         *sink = p;
0040         ++sink;
0041         return detail::sink_is_good(sink);
0042     }
0043
0044     template <typename OutputIterator, typename CharEncoding, typename Tag>
0045     inline bool generate_to(OutputIterator&, unused_type, CharEncoding, Tag)
0046     {
0047         return true;
0048     }
0049
0050     template <typename OutputIterator, typename Attribute>
0051     inline bool
0052     generate_to(OutputIterator& sink, Attribute const& p)
0053     {
0054         *sink = p;
0055         ++sink;
0056         return detail::sink_is_good(sink);
0057     }
0058
0059     template <typename OutputIterator>
0060     inline bool generate_to(OutputIterator&, unused_type)
0061     {
0062         return true;
0063     }
0064
0065 }}}}   // namespace boost::spirit::karma::detail
0066
0067 #endif  // KARMA_CORE_DETAIL_INSERT_TO_HPP