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concurrentqueue/benchmarks/boost/parameter/aux_/void.hpp

30 lines
688 B
C++

// 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