text: 
  //  (C) Copyright Edward Diener 2011-2015
  //  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).
  
  #if !defined(BOOST_VMD_IS_EMPTY_LIST_HPP)
  #define BOOST_VMD_IS_EMPTY_LIST_HPP
  
  #include <boost/vmd/detail/setup.hpp>
  
  #if BOOST_PP_VARIADICS
  
  #include <boost/vmd/detail/is_list.hpp>
  
  /*
  
    The succeeding comments in this file are in doxygen format.
  
  */
  
  /** \file
  */
  
  /** \def BOOST_VMD_IS_EMPTY_LIST(sequence)
  
      \brief Tests whether a sequence is an empty Boost PP list.
  
      An empty Boost PP list consists of the single identifier 'BOOST_PP_NIL'.
      This identifier also serves as a list terminator for a non-empty list.
      
      sequence = a preprocessor parameter
  
      returns = 1 if the sequence is an empty Boost PP list
                0 if it is not.
                
      The macro will generate a preprocessing error if the input
      as an empty list marker, instead of being an identifier, is 
      a preprocessor token which VMD cannot parse, as in the 
      example '&BOOST_PP_NIL'.
      
  */
  
  #define BOOST_VMD_IS_EMPTY_LIST(sequence) \
      BOOST_VMD_DETAIL_IS_LIST_IS_EMPTY_LIST_PROCESS(sequence) \
  /**/
  
  /** \def BOOST_VMD_IS_EMPTY_LIST_D(d,sequence)
  
      \brief Tests whether a sequence is an empty Boost PP list. Re-entrant version.
  
      An empty Boost PP list consists of the single identifier 'BOOST_PP_NIL'.
      This identifier also serves as a list terminator for a non-empty list.
      
      d        = The next available BOOST_PP_WHILE iteration
      sequence = a preprocessor parameter
  
      returns = 1 if the sequence is an empty Boost PP list
                0 if it is not.
                
      The macro will generate a preprocessing error if the input
      as an empty list marker, instead of being an identifier, is 
      a preprocessor token which VMD cannot parse, as in the 
      example '&BOOST_PP_NIL'.
      
  */
  
  #define BOOST_VMD_IS_EMPTY_LIST_D(d,sequence) \
      BOOST_VMD_DETAIL_IS_LIST_IS_EMPTY_LIST_PROCESS_D(d,sequence) \
  /**/
  
  #endif /* BOOST_PP_VARIADICS */
  #endif /* BOOST_VMD_IS_EMPTY_LIST_HPP */
  