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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\xpressive\detail\core\matcher\literal_matcher.hpp

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///////////////////////////////////////////////////////////////////////////////
// literal_matcher.hpp
//
//  Copyright 2007 Eric Niebler. Distributed under the Boost
//  Software License, Version 1.0. (See accompanying file
//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

#ifndef BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_LITERAL_MATCHER_HPP_EAN_10_04_2005
#define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_LITERAL_MATCHER_HPP_EAN_10_04_2005

// MS compatible compilers support #pragma once
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif

#include <boost/xpressive/detail/detail_fwd.hpp>
#include <boost/xpressive/detail/core/quant_style.hpp>
#include <boost/xpressive/detail/core/state.hpp>
#include <boost/xpressive/detail/utility/traits_utils.hpp>

namespace boost { namespace xpressive { namespace detail
{

    ///////////////////////////////////////////////////////////////////////////////
    // literal_matcher
    //
    template<typename Traits, bool ICase, bool Not>
    struct literal_matcher
      : quant_style_fixed_width<1>
    {
        typedef typename Traits::char_type char_type;
        typedef mpl::bool_<Not> not_type;
        typedef mpl::bool_<ICase> icase_type;
        char_type ch_;

        typedef literal_matcher<Traits, ICase, !Not> inverse_type;
        explicit literal_matcher(inverse_type that)
          : ch_(that.ch_)
        {}

        literal_matcher(char_type ch, Traits const &traits)
          : ch_(detail::translate(ch, traits, icase_type()))
        {}

        template<typename BidiIter, typename Next>
        bool match(match_state<BidiIter> &state, Next const &next) const
        {
            if(state.eos() || Not ==
                (detail::translate(*state.cur_, traits_cast<Traits>(state), icase_type()) == this->ch_))
            {
                return false;
            }

            ++state.cur_;
            if(next.match(state))
            {
                return true;
            }

            --state.cur_;
            return false;
        }
    };

}}}

#endif

literal_matcher.hpp

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