null.hpp

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/*------------------------------------------------------------------------------
    Copyright Butterfly Energy Systems 2014-2015, 2022.
    Distributed under the Boost Software License, Version 1.0.
    http://www.boost.org/LICENSE_1_0.txt
------------------------------------------------------------------------------*/
 
#ifndef CPPWAMP_NULL_HPP
#define CPPWAMP_NULL_HPP
 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
 
#include <ostream>
#include "api.hpp"
#include "config.hpp"
 
namespace wamp
{
 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
struct CPPWAMP_API Null
{
    constexpr Null() = default;
 
    bool operator==(Null) const {return true;}
 
    bool operator!=(Null) const {return false;}
 
    bool operator<(Null) const {return false;}
};
 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
CPPWAMP_API inline std::ostream& operator<<(std::ostream& out, Null)
{
    return out << "null";
}
 
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
CPPWAMP_INLINE_VARIABLE constexpr Null null;
 
 
} // namespace wamp
 
#endif // CPPWAMP_NULL_HPP