text: //  (C) Copyright Howard Hinnant
  //  (C) Copyright 2011 Vicente J. Botet Escriba
  //  Use, modification and distribution are subject to 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).
  //
  // This code was adapted by Vicente from Howard Hinnant's experimental work
  // on chrono i/o to Boost
  
  #ifndef BOOST_CHRONO_IO_DURATION_STYLE_HPP
  #define BOOST_CHRONO_IO_DURATION_STYLE_HPP
  
  #include <boost/detail/scoped_enum_emulation.hpp>
  
  namespace boost
  {
    namespace chrono
    {
      /**
       * Scoped enumeration emulation stating whether the duration I/O style is long or short.
       * prefix means duration::rep with whatever stream/locale settings are set for it followed by a long name representing the unit
       * symbol means duration::rep with whatever stream/locale settings are set for it followed by a SI unit abbreviation
       */
      BOOST_SCOPED_ENUM_DECLARE_BEGIN(duration_style)
            {
              prefix, symbol
            }
      BOOST_SCOPED_ENUM_DECLARE_END(duration_style)
  
  
    } // chrono
  
  }
  
  #endif  // header
  