G4PhysListStamper.hh

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#ifndef G4PhysListStamper_h
#define G4PhysListStamper_h 1


#include "globals.hh"
#include "G4PhysListRegistry.hh"
#include "G4VModularPhysicsList.hh"

class G4VBasePhysListStamper
{

public:

  virtual G4VModularPhysicsList* Instantiate(G4int /* verbose */) = 0;

};


template <typename T> class G4PhysListStamper : public G4VBasePhysListStamper
{
public:
  
  G4PhysListStamper(const G4String& name)
  {
    G4PhysListRegistry::Instance()->AddFactory(name, this);
  }
  
  virtual G4VModularPhysicsList* Instantiate(G4int verbose) 
  {
    return new T(verbose);
  }
};

#define G4_DECLARE_PHYSLIST_FACTORY(physics_list) \
  const G4PhysListStamper<physics_list>& physics_list##Factory = G4PhysListStamper<physics_list>(#physics_list)

// support for physics list defined within a namespace
// a bit tricky because cpp macro expansion doesn't like "::"
// ala  G4_DECLARE_PHYSLIST_FACTORY_NS(myns::MyPL,myns,MyPL)   // without trailing ";"
#define G4_DECLARE_PHYSLIST_FACTORY_NS( physics_list , nsname , plbase )    \
  namespace nsname {                                                    \
    const G4PhysListStamper<physics_list>& plbase##Factory = G4PhysListStamper<physics_list>(#physics_list); \
  }

#endif