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///////////////////////////////////////////////////////////////////////////////
// charset_matcher.hpp
//
// Copyright 2008 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_CHARSET_MATCHER_HPP_EAN_10_04_2005
#define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_CHARSET_MATCHER_HPP_EAN_10_04_2005
// MS compatible compilers support #pragma once
#if defined(_MSC_VER)
# 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>
namespace boost { namespace xpressive { namespace detail
{
///////////////////////////////////////////////////////////////////////////////
// charset_matcher
//
template<typename Traits, typename ICase, typename CharSet>
struct charset_matcher
: quant_style_fixed_width<1>
{
typedef typename Traits::char_type char_type;
typedef Traits traits_type;
typedef ICase icase_type;
charset_matcher(CharSet const &charset = CharSet())
: charset_(charset)
{
}
void inverse()
{
this->charset_.inverse();
}
template<typename BidiIter, typename Next>
bool match(match_state<BidiIter> &state, Next const &next) const
{
if(state.eos() || !this->charset_.test(*state.cur_, traits_cast<Traits>(state), icase_type()))
{
return false;
}
++state.cur_;
if(next.match(state))
{
return true;
}
--state.cur_;
return false;
}
CharSet charset_;
};
}}}
#endif
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