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

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // set.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_SET_HPP_EAN_10_04_2005
   9 #define BOOST_XPRESSIVE_DETAIL_SET_HPP_EAN_10_04_2005
  10
  11 // MS compatible compilers support #pragma once
  12 #if defined(_MSC_VER)
  13 # pragma once
  14 # pragma warning(push)
  15 # pragma warning(disable : 4127) // conditional expression constant
  16 # pragma warning(disable : 4100) // unreferenced formal parameter
  17 # pragma warning(disable : 4351) // vc8 new behavior: elements of array 'foo' will be default initialized
  18 #endif
  19
  20 #include <algorithm>
  21 #include <boost/mpl/assert.hpp>
  22 #include <boost/type_traits/same_traits.hpp>
  23 #include <boost/xpressive/detail/detail_fwd.hpp>
  24 #include <boost/xpressive/detail/core/quant_style.hpp>
  25 #include <boost/xpressive/detail/core/state.hpp>
  26
  27 namespace boost { namespace xpressive { namespace detail
  28 {
  29
  30 ///////////////////////////////////////////////////////////////////////////////
  31 // set_matcher
  32 //
  33 template<typename Traits, typename Size>
  34 struct set_matcher
  35   : quant_style_fixed_width<1>
  36 {
  37     typedef typename Traits::char_type char_type;
  38     char_type set_[ Size::value ];
  39     bool not_;
  40     bool icase_;
  41
  42     set_matcher()
  43       : set_()
  44       , not_(false)
  45       , icase_(false)
  46     {
  47     }
  48
  49     void inverse()
  50     {
  51         this->not_ = !this->not_;
  52     }
  53
  54     void nocase(Traits const &tr)
  55     {
  56         this->icase_ = true;
  57
  58         for(int i = 0; i < Size::value; ++i)
  59         {
  60             this->set_[i] = tr.translate_nocase(this->set_[i]);
  61         }
  62     }
  63
  64     bool in_set(Traits const &tr, char_type ch) const
  65     {
  66         char_type const *begin = &this->set_[0], *end = begin + Size::value;
  67         ch = this->icase_ ? tr.translate_nocase(ch) : tr.translate(ch);
  68         return end != std::find(begin, end, ch);
  69     }
  70
  71     template<typename BidiIter, typename Next>
  72     bool match(match_state<BidiIter> &state, Next const &next) const
  73     {
  74         if(state.eos() || this->not_ == this->in_set(traits_cast<Traits>(state), *state.cur_))
  75         {
  76             return false;
  77         }
  78
  79         if(++state.cur_, next.match(state))
  80         {
  81             return true;
  82         }
  83
  84         return --state.cur_, false;
  85     }
  86 };
  87
  88 ///////////////////////////////////////////////////////////////////////////////
  89 // set_initializer
  90 struct set_initializer
  91 {
  92 };
  93
  94 #if defined(_MSC_VER)
  95 # pragma warning(pop)
  96 #endif
  97
  98 }}} // namespace boost::xpressive::detail
  99
 100 #endif