Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/materials/include/G4VMaterialExtension.hh

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  1 //
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  3 // * License and Disclaimer                                           *
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 24 // ********************************************************************
 25 
 26 //---------------------------------------------------------------------------
 27 //
 28 // ClassName:   G4VMaterialExtension
 29 //
 30 // Description: Contains extended material properties
 31 //
 32 // Class description:
 33 //
 34 // Is used to define the additional material information. This class
 35 // is an abstract base class to be extended for each extension.
 36 // Object(s) of G4VMaterialExtension should be registered to
 37 // G4ExtendedMaterial.
 38 //
 39 
 40 #ifndef G4VMATERIALEXTENSION_HH
 41 #define G4VMATERIALEXTENSION_HH 1
 42 
 43 #include "G4String.hh"
 44 #include "G4ios.hh"
 45 #include "globals.hh"
 46 
 47 #include <functional>
 48 #include <string>
 49 
 50 // Hash of extension material name
 51 using G4MaterialExtensionHash = std::hash<std::string>;
 52 
 53 class G4VMaterialExtension
 54 {
 55  public:  // with description
 56   // Base class constructor
 57   G4VMaterialExtension(const G4String& name) : fName(name), fHash(G4MaterialExtensionHash{}(name))
 58   {}
 59   virtual ~G4VMaterialExtension() = default;
 60 
 61   virtual void Print() const = 0;
 62 
 63   // Return the hash value of this extension
 64   const std::size_t& GetHash() const { return fHash; }
 65   // Return the extension name
 66   const G4String& GetName() const { return fName; }
 67 
 68  protected:
 69   // Name of the extension
 70   const G4String& fName;
 71   // Hash value of the name.
 72   // Calculated at initialization time
 73   const std::size_t fHash;
 74 };
 75 
 76 #endif
 77