/usr/include/boost/xpressive/detail/core/matcher/mark_begin_matcher.hpp is in libboost1.55-dev 1.55.0+dfsg-3.
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// mark_begin_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_BEGIN_MATCHER_HPP_EAN_10_04_2005
#define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_MARK_BEGIN_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>
namespace boost { namespace xpressive { namespace detail
{
///////////////////////////////////////////////////////////////////////////////
// mark_begin_matcher
//
struct mark_begin_matcher
: quant_style<quant_fixed_width, 0, false>
{
int mark_number_; // signed because it could be negative
mark_begin_matcher(int mark_number)
: mark_number_(mark_number)
{
}
template<typename BidiIter, typename Next>
bool match(match_state<BidiIter> &state, Next const &next) const
{
sub_match_impl<BidiIter> &br = state.sub_match(this->mark_number_);
BidiIter old_begin = br.begin_;
br.begin_ = state.cur_;
if(next.match(state))
{
return true;
}
br.begin_ = old_begin;
return false;
}
};
}}}
#endif
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