text: // Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
  // Copyright (C) 2016 Andrzej Krzemienski
  //
  // Use, modification, and distribution is 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)
  //
  // See http://www.boost.org/libs/optional for documentation.
  //
  // You are welcome to contact the author at:
  //  fernando_cacciola@hotmail.com
  //
  // Revisions:
  // 10 May 2008 (added swap related forward declaration) Niels Dekker
  //
  #ifndef BOOST_OPTIONAL_OPTIONAL_FWD_FLC_19NOV2002_HPP
  #define BOOST_OPTIONAL_OPTIONAL_FWD_FLC_19NOV2002_HPP
  
  #include <boost/config.hpp>
  
  namespace lslboost {
  
  template<class T> class optional ;
  
  // This forward is needed to refer to namespace scope swap from the member swap
  template<class T> void swap ( optional<T>& , optional<T>& ) ;
  
  template<class T> struct optional_swap_should_use_default_constructor ;
  
  #ifndef BOOST_OPTIONAL_CONFIG_DONT_SPECIALIZE_OPTIONAL_REFS
  
  template<class T> class optional<T&> ;
  
  template<class T> void swap ( optional<T&>& , optional<T&>& ) BOOST_NOEXCEPT;
  
  #endif
  
  } // namespace lslboost
  
  #endif
  
  