ceph/src/boost/boost/xpressive/detail/core/matcher/mark_end_matcher.hpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // mark_end_matcher.hpp
   3 //
   4 //  Copyright 2008 Eric Niebler. Distributed under the Boost
   5 //  Software License, Version 1.0. (See accompanying file
   6 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   7
   8 #ifndef BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_MARK_END_MATCHER_HPP_EAN_10_04_2005
   9 #define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_MARK_END_MATCHER_HPP_EAN_10_04_2005
  10
  11 // MS compatible compilers support #pragma once
  12 #if defined(_MSC_VER)
  13 # pragma once
  14 #endif
  15
  16 #include <boost/xpressive/detail/detail_fwd.hpp>
  17 #include <boost/xpressive/detail/core/quant_style.hpp>
  18 #include <boost/xpressive/detail/core/state.hpp>
  19
  20 namespace boost { namespace xpressive { namespace detail
  21 {
  22
  23     ///////////////////////////////////////////////////////////////////////////////
  24     // mark_end_matcher
  25     //
  26     struct mark_end_matcher
  27       : quant_style<quant_none, 0, false>
  28     {
  29         int mark_number_;
  30
  31         mark_end_matcher(int mark_number)
  32           : mark_number_(mark_number)
  33         {
  34         }
  35
  36         template<typename BidiIter, typename Next>
  37         bool match(match_state<BidiIter> &state, Next const &next) const
  38         {
  39             sub_match_impl<BidiIter> &br = state.sub_match(this->mark_number_);
  40
  41             BidiIter old_first = br.first;
  42             BidiIter old_second = br.second;
  43             bool old_matched = br.matched;
  44
  45             br.first = br.begin_;
  46             br.second = state.cur_;
  47             br.matched = true;
  48
  49             if(next.match(state))
  50             {
  51                 return true;
  52             }
  53
  54             br.first = old_first;
  55             br.second = old_second;
  56             br.matched = old_matched;
  57
  58             return false;
  59         }
  60     };
  61
  62 }}}
  63
  64 #endif