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

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // posix_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_POSIX_CHARSET_MATCHER_HPP_EAN_10_04_2005
   9 #define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_POSIX_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/assert.hpp>
  17 #include <boost/mpl/bool.hpp>
  18 #include <boost/xpressive/detail/detail_fwd.hpp>
  19 #include <boost/xpressive/detail/core/quant_style.hpp>
  20 #include <boost/xpressive/detail/core/state.hpp>
  21 #include <boost/xpressive/detail/utility/traits_utils.hpp>
  22
  23 namespace boost { namespace xpressive { namespace detail
  24 {
  25
  26     ///////////////////////////////////////////////////////////////////////////////
  27     // posix_charset_matcher
  28     //
  29     template<typename Traits>
  30     struct posix_charset_matcher
  31       : quant_style_fixed_width<1>
  32     {
  33         typedef Traits traits_type;
  34         typedef typename Traits::char_class_type char_class_type;
  35
  36         posix_charset_matcher(char_class_type m, bool no)
  37           : not_(no)
  38           , mask_(m)
  39         {
  40             BOOST_ASSERT(0 != this->mask_);
  41         }
  42
  43         void inverse()
  44         {
  45             this->not_ = !this->not_;
  46         }
  47
  48         template<typename BidiIter, typename Next>
  49         bool match(match_state<BidiIter> &state, Next const &next) const
  50         {
  51             if(state.eos() || this->not_ == traits_cast<Traits>(state).isctype(
  52                 *state.cur_, this->mask_))
  53             {
  54                 return false;
  55             }
  56
  57             ++state.cur_;
  58             if(next.match(state))
  59             {
  60                 return true;
  61             }
  62
  63             --state.cur_;
  64             return false;
  65         }
  66
  67         bool not_;
  68         char_class_type mask_;
  69     };
  70
  71 }}}
  72
  73 #endif