MaterialsHelpers.hh

Go to the documentation of this file.

//GeoModulesCopyMaterials.  D.S. Leonard 2026 (code is much older, ~ 2017
// This typically gets included through VolumeBuilders.hh !!
 
#pragma once
#include "VolumeBuildersTypes.hh"
#include "VolumeBuildersUnitTypes.hh"
#include <G4Material.hh>
#include <G4String.hh>
#include <G4Element.hh>
#ifndef GEOMODULE_MATERIALS_HELPERS_HH
#define GEOMODULE_MATERIALS_HELPERS_HH
 
 
namespace DLG4::VolumeBuilders::Helpers {
    G4Material *CopyMaterial(
            G4MaterialPtrOrString source, const G4String &name, G4double dens, Density unit);
 
    G4Material *CopyMaterial(G4MaterialPtrOrString source, const G4String &name);
 
    G4Material *GetMaterial(const G4String &materialName);
    G4Element *GetElement(const G4String &elementName);
 
    class G4MaterialPtrOrString {
    public:
        G4MaterialPtrOrString()
            : m_ptr(nullptr) {
        }
 
        // Add this constructor to handle "literal strings"
        G4MaterialPtrOrString(const char *name)
            : m_ptr(VBHelpers::GetMaterial(G4String(name))) {
        }
 
        // Converting constructor from G4Material*
        G4MaterialPtrOrString(G4Material *mat)
            : m_ptr(mat) {
        }
 
        // Converting constructor from string
        G4MaterialPtrOrString(const G4String &name)
            : m_ptr(VBHelpers::GetMaterial(name)) {
        }
 
        // Conversion operator to G4Material*
        operator G4Material *() const { return m_ptr; }
        // Arrow operator to use it like a pointer directly
        G4Material *operator->() const { return m_ptr; }
        // Explicit bool operator prevents accidental math/logic errors
        // but allows use in 'if' statements.
        explicit operator bool() const {
            return m_ptr != nullptr;
        }
 
    private:
        G4Material *m_ptr;
    };
}
#endif