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///////////////////////////////////////////////////////////////////////////////
// mark_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_MARK_MATCHER_HPP_EAN_10_04_2005
#define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_MARK_MATCHER_HPP_EAN_10_04_2005
// MS compatible compilers support #pragma once
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif
#include <boost/assert.hpp>
#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
{
// TODO: the mark matcher is acually a fixed-width matcher, but the width is
// not known until pattern match time.
///////////////////////////////////////////////////////////////////////////////
// mark_matcher
//
template<typename Traits, typename ICase>
struct mark_matcher
: quant_style_variable_width
{
typedef ICase icase_type;
int mark_number_;
mark_matcher(int mark_number, Traits const &)
: mark_number_(mark_number)
{
}
template<typename BidiIter, typename Next>
bool match(match_state<BidiIter> &state, Next const &next) const
{
BOOST_ASSERT(this->mark_number_ < static_cast<int>(state.mark_count_));
sub_match_impl<BidiIter> const &br = state.sub_match(this->mark_number_);
if(!br.matched)
{
return false;
}
BidiIter const tmp = state.cur_;
for(BidiIter begin = br.first, end = br.second; begin != end; ++begin, ++state.cur_)
{
if(state.eos()
|| detail::translate(*state.cur_, traits_cast<Traits>(state), icase_type())
!= detail::translate(*begin, traits_cast<Traits>(state), icase_type()))
{
state.cur_ = tmp;
return false;
}
}
if(next.match(state))
{
return true;
}
state.cur_ = tmp;
return false;
}
};
}}}
#endif
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