boost/xpressive/detail/core/matcher/assert_bol_matcher.hpp
///////////////////////////////////////////////////////////////////////////////
// assert_bol_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_ASSERT_BOL_MATCHER_HPP_EAN_10_04_2005
#define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_ASSERT_BOL_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/core/matcher/assert_line_base.hpp>
namespace boost { namespace xpressive { namespace detail
{
///////////////////////////////////////////////////////////////////////////////
// assert_bol_matcher
//
template<typename Traits>
struct assert_bol_matcher
: assert_line_base<Traits>
{
assert_bol_matcher(Traits const &traits)
: assert_line_base<Traits>(traits)
{
}
template<typename BidiIter, typename Next>
bool match(match_state<BidiIter> &state, Next const &next) const
{
if(state.bos())
{
if(!state.flags_.match_bol_)
{
return false;
}
}
else if(!this->is_line_break(state))
{
return false;
}
return next.match(state);
}
};
}}}
#endif