ceph/src/boost/libs/xpressive/include/boost/xpressive/detail/core/matcher/attr_end_matcher.hpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // attr_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_ATTR_END_MATCHER_HPP_EAN_06_09_2007
   9 #define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_ATTR_END_MATCHER_HPP_EAN_06_09_2007
  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     // attr_end_matcher
  25     //
  26     struct attr_end_matcher
  27       : quant_style<quant_none, 0, false>
  28     {
  29         template<typename BidiIter, typename Next>
  30         static bool match(match_state<BidiIter> &state, Next const &next)
  31         {
  32             attr_context old_attr_context = state.attr_context_;
  33             state.attr_context_ = *old_attr_context.prev_attr_context_;
  34
  35             if(next.match(state))
  36             {
  37                 return true;
  38             }
  39
  40             state.attr_context_ = old_attr_context;
  41             return false;
  42         }
  43     };
  44
  45 }}}
  46
  47 #endif