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

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // charset_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_CHARSET_MATCHER_HPP_EAN_10_04_2005
   9 #define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_CHARSET_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     // charset_matcher
  25     //
  26     template<typename Traits, typename ICase, typename CharSet>
  27     struct charset_matcher
  28       : quant_style_fixed_width<1>
  29     {
  30         typedef typename Traits::char_type char_type;
  31         typedef Traits traits_type;
  32         typedef ICase icase_type;
  33
  34         charset_matcher(CharSet const &charset = CharSet())
  35           : charset_(charset)
  36         {
  37         }
  38
  39         void inverse()
  40         {
  41             this->charset_.inverse();
  42         }
  43
  44         template<typename BidiIter, typename Next>
  45         bool match(match_state<BidiIter> &state, Next const &next) const
  46         {
  47             if(state.eos() || !this->charset_.test(*state.cur_, traits_cast<Traits>(state), icase_type()))
  48             {
  49                 return false;
  50             }
  51
  52             ++state.cur_;
  53             if(next.match(state))
  54             {
  55                 return true;
  56             }
  57
  58             --state.cur_;
  59             return false;
  60         }
  61
  62         CharSet charset_;
  63     };
  64
  65 }}}
  66
  67 #endif