ceph/src/boost/libs/parameter/include/boost/parameter/aux_/void.hpp

   1 // Copyright Daniel Wallin, David Abrahams 2005. Use, modification and
   2 // distribution is subject to the Boost Software License, Version 1.0. (See
   3 // accompanying file LICENSE_1_0.txt or copy at
   4 // http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #ifndef BOOST_PARAMETER_VOID_050329_HPP
   7 #define BOOST_PARAMETER_VOID_050329_HPP
   8
   9 namespace boost { namespace parameter {
  10
  11 // A placemarker for "no argument passed."
  12 // MAINTAINER NOTE: Do not make this into a metafunction
  13 struct void_ {};
  14
  15 namespace aux
  16 {
  17
  18   inline void_& void_reference()
  19   {
  20       static void_ instance;
  21       return instance;
  22   }
  23
  24 } // namespace aux
  25
  26 }} // namespace boost::parameter
  27
  28 #endif // BOOST_PARAMETER_VOID_050329_HPP
  29