no-instance.hpp

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/*
  NO-INSTANCE.hpp  -  marker for pure metaprogramming types
 
   Copyright (C)
     2011,            Hermann Vosseler <Ichthyostega@web.de>
 
 **Lumiera** is free software; you can redistribute it and/or modify it
 under the terms of the GNU General Public License as published by the
 Free Software Foundation; either version 2 of the License, or (at your
 option) any later version. See the file COPYING for further details.
 
*/
 
 
#ifndef LIB_META_NO_INSTANCE_H
#define LIB_META_NO_INSTANCE_H
 
  
namespace lib {
namespace meta{
  
  template<class X>
  struct NoInstance
    {
      NoInstance()                   { static_assert (!sizeof(X)); }
      NoInstance (NoInstance const&) { static_assert (!sizeof(X)); }
    };
  
}} // namespace lib::meta
#endif