polyBase.h

/*
  @copyright Russell Standish 2000-2013
  @author Russell Standish
  This file is part of Classdesc
 
  Open source licensed under the MIT license. See LICENSE for details.
*/
 
#ifndef CLASSDESC_POLYBASE_H
#define CLASSDESC_POLYBASE_H
#include <classdesc.h>
 
namespace classdesc
{
  struct PolyBaseMarker {};

  template <class T>
  struct PolyBase: public PolyBaseMarker
  {
    typedef T Type;
    virtual Type type() const=0;
    virtual PolyBase* clone() const=0;
#if defined(__cplusplus) && __cplusplus>=201103L
    typedef std::unique_ptr<PolyBase> AutoPtr;
#else
    typedef std::auto_ptr<PolyBase> AutoPtr;
#endif
    template <class U>
    U* cloneT() const {
      AutoPtr p(clone());
      U* t=dynamic_cast<U*>(p.get());
      if (t)
        p.release();
      return t;
    }
    virtual ~PolyBase() {}
  };
 


 
  template <class T, class Base>
  struct Poly: virtual public Base
  {
    Poly* clone() const {return new T(*static_cast<const T*>(this));}
  };
}
 
#endif