boost/parameter/aux_/void.hpp

// Copyright Daniel Wallin, David Abrahams 2005. 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)
#ifndef BOOST_PARAMETER_VOID_050329_HPP
#define BOOST_PARAMETER_VOID_050329_HPP
namespace boost { namespace parameter { 
// A placemarker for "no argument passed."
// MAINTAINER NOTE: Do not make this into a metafunction
struct void_ {}; 
namespace aux 
{
  inline void_& void_reference()
  {
      static void_ instance;
      return instance;
  }
} // namespace aux
}} // namespace boost::parameter
#endif // BOOST_PARAMETER_VOID_050329_HPP