ceph/src/boost/libs/spirit/include/boost/spirit/home/x3/directive/raw.hpp

   1 /*=============================================================================
   2     Copyright (c) 2014 Joel de Guzman
   3
   4     Distributed under the Boost Software License, Version 1.0. (See accompanying
   5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 =============================================================================*/
   7 #if !defined(SPIRIT_X3_RAW_APRIL_9_2007_0912AM)
   8 #define SPIRIT_X3_RAW_APRIL_9_2007_0912AM
   9
  10 #include <boost/spirit/home/x3/core/skip_over.hpp>
  11 #include <boost/spirit/home/x3/core/parser.hpp>
  12 #include <boost/spirit/home/x3/support/traits/move_to.hpp>
  13 #include <boost/range/iterator_range.hpp>
  14
  15 namespace boost { namespace spirit { namespace x3
  16 {
  17     // this is a pseudo attribute type indicating that the parser wants the
  18     // iterator range pointing to the [first, last) matching characters from
  19     // the input iterators.
  20     struct raw_attribute_type {};
  21
  22     template <typename Subject>
  23     struct raw_directive : unary_parser<Subject, raw_directive<Subject>>
  24     {
  25         typedef unary_parser<Subject, raw_directive<Subject> > base_type;
  26         typedef raw_attribute_type attribute_type;
  27         static bool const handles_container = Subject::handles_container;
  28         typedef Subject subject_type;
  29
  30         raw_directive(Subject const& subject)
  31           : base_type(subject) {}
  32
  33         template <typename Iterator, typename Context
  34             , typename RContext, typename Attribute>
  35         bool parse(Iterator& first, Iterator const& last
  36           , Context const& context, RContext& rcontext, Attribute& attr) const
  37         {
  38             x3::skip_over(first, last, context);
  39             Iterator i = first;
  40             if (this->subject.parse(i, last, context, rcontext, unused))
  41             {
  42                 traits::move_to(first, i, attr);
  43                 first = i;
  44                 return true;
  45             }
  46             return false;
  47         }
  48
  49         template <typename Iterator, typename Context, typename RContext>
  50         bool parse(Iterator& first, Iterator const& last
  51           , Context const& context, RContext& rcontext, unused_type) const
  52         {
  53             return this->subject.parse(first, last, context, rcontext, unused);
  54         }
  55     };
  56
  57     struct raw_gen
  58     {
  59         template <typename Subject>
  60         raw_directive<typename extension::as_parser<Subject>::value_type>
  61         operator[](Subject const& subject) const
  62         {
  63             return { as_parser(subject) };
  64         }
  65     };
  66
  67     auto const raw = raw_gen{};
  68 }}}
  69
  70 #endif