G4VMaterialExtension.hh

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//
// $Id: G4VMaterialExtension.hh 96776 2016-05-06 14:11:00Z vnivanch $
//

//---------------------------------------------------------------------------
//
// ClassName:   G4VMaterialExtension
//
// Description: Contains extended material properties
//
// Class description:
//
// Is used to define the additional material information. This class
// is an abstract base class to be extended for each extension.
// Object(s) of G4VMaterialExtension should be registered to
// G4ExtendedMaterial.
//

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#ifndef G4VMATERIALEXTENSION_HH
#define G4VMATERIALEXTENSION_HH 1

#include "globals.hh"
#include "G4ios.hh"
#include <functional>
#include <string>
#include "G4String.hh"

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//Hash of extension material name
using G4MaterialExtensionHash=std::hash<std::string>;

class G4VMaterialExtension
{
public:  // with description
  //
  // Base class constructor
  //
  G4VMaterialExtension(const G4String& name) :
    fName(name),fHash(G4MaterialExtensionHash{}(name)) {}
  virtual ~G4VMaterialExtension() {;}

  virtual void Print() const = 0;

  // Return the hash value of this extension
  const std::size_t& GetHash() const { return fHash;}
  // Return the extension name
  const G4String& GetName() const { return fName; }
protected:
  // Name of the extension
  const G4String& fName;
  // Hash value of the name.
  // Calculated at initialization time
  const std::size_t fHash;
};

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#endif