Transient.h

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#ifndef canvas_Persistency_Provenance_Transient_h
#define canvas_Persistency_Provenance_Transient_h

// forward declarations
namespace art {

  template <typename T>
  class Transient {
  public:
    typedef T value_type;
    Transient(T value = T()) : value_(value) {}
    operator T() const { return value_; }
    Transient&
    operator=(T rh)
    {
      value_ = rh;
      return *this;
    }
    T const&
    get() const
    {
      return value_;
    }
    T&
    get()
    {
      return value_;
    }

  private:
    T value_;
  };
}
#endif /* canvas_Persistency_Provenance_Transient_h */

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