text: ///////////////////////////////////////////////////////////////////////////////
  // assert_line_base.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_DETAIL_ASSERT_LINE_BASE_HPP_EAN_10_04_2005
  #define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_DETAIL_ASSERT_LINE_BASE_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
  {
  
      ///////////////////////////////////////////////////////////////////////////////
      // assert_line_base
      //
      template<typename Traits>
      struct assert_line_base
          : quant_style_assertion
      {
          typedef typename Traits::char_type char_type;
          typedef typename Traits::char_class_type char_class_type;
  
      protected:
          assert_line_base(Traits const &traits)
              : newline_(lookup_classname(traits, "newline"))
              , nl_(traits.widen('\n'))
              , cr_(traits.widen('\r'))
          {
          }
  
          char_class_type newline_;
          char_type nl_, cr_;
      };
  
  }}}
  
  #endif
  