ceph/src/boost/libs/spirit/include/boost/spirit/home/x3/auxiliary/eol.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2014 Joel de Guzman
   3     Copyright (c) 2001-2011 Hartmut Kaiser
   4
   5     Distributed under the Boost Software License, Version 1.0. (See accompanying
   6     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   7 ==============================================================================*/
   8 #if !defined(BOOST_SPIRIT_X3_EOL_MARCH_23_2007_0454PM)
   9 #define BOOST_SPIRIT_X3_EOL_MARCH_23_2007_0454PM
  10
  11 #include <boost/spirit/home/x3/core/skip_over.hpp>
  12 #include <boost/spirit/home/x3/core/parser.hpp>
  13 #include <boost/spirit/home/x3/support/unused.hpp>
  14
  15 namespace boost { namespace spirit { namespace x3
  16 {
  17     struct eol_parser : parser<eol_parser>
  18     {
  19         typedef unused_type attribute_type;
  20         static bool const has_attribute = false;
  21
  22         template <typename Iterator, typename Context, typename Attribute>
  23         bool parse(Iterator& first, Iterator const& last
  24          , Context const& context, unused_type, Attribute& /*attr*/) const
  25         {
  26             x3::skip_over(first, last, context);
  27             Iterator iter = first;
  28             bool matched = false;
  29             if (iter != last && *iter == '\r')  // CR
  30             {
  31                 matched = true;
  32                 ++iter;
  33             }
  34             if (iter != last && *iter == '\n')  // LF
  35             {
  36                 matched = true;
  37                 ++iter;
  38             }
  39
  40             if (matched) first = iter;
  41             return matched;
  42         }
  43     };
  44
  45     template<>
  46     struct get_info<eol_parser>
  47     {
  48         typedef std::string result_type;
  49         result_type operator()(eol_parser const &) const { return "eol"; }
  50     };
  51
  52     auto const eol = eol_parser{};
  53 }}}
  54
  55 #endif