Apply override to Bond classes

src/CG-DNA/bond_oxdna2_fene.h

@@ -27,8 +27,7 @@ namespace LAMMPS_NS {
 class BondOxdna2Fene : public BondOxdnaFene {
  public:
   BondOxdna2Fene(class LAMMPS *lmp) : BondOxdnaFene(lmp) {}
-  virtual ~BondOxdna2Fene() {}
-  virtual void compute_interaction_sites(double *, double *, double *, double *) const;
+  void compute_interaction_sites(double *, double *, double *, double *) const override;
 };
 
 }    // namespace LAMMPS_NS

src/CG-DNA/bond_oxdna_fene.h

@@ -27,16 +27,16 @@ namespace LAMMPS_NS {
 class BondOxdnaFene : public Bond {
  public:
   BondOxdnaFene(class LAMMPS *lmp) : Bond(lmp) {}
-  virtual ~BondOxdnaFene();
+  ~BondOxdnaFene() override;
   virtual void compute_interaction_sites(double *, double *, double *, double *) const;
-  virtual void compute(int, int);
-  void coeff(int, char **);
-  void init_style();
-  double equilibrium_distance(int);
-  void write_restart(FILE *);
-  void read_restart(FILE *);
-  void write_data(FILE *);
-  double single(int, double, int, int, double &);
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  void init_style() override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_data(FILE *) override;
+  double single(int, double, int, int, double &) override;
 
  protected:
   double *k, *Delta, *r0;    // FENE

src/CG-DNA/bond_oxrna2_fene.h

@@ -27,9 +27,8 @@ namespace LAMMPS_NS {
 class BondOxrna2Fene : public BondOxdnaFene {
  public:
   BondOxrna2Fene(class LAMMPS *lmp) : BondOxdnaFene(lmp) {}
-  virtual ~BondOxrna2Fene() {}
 
-  virtual void compute_interaction_sites(double *, double *, double *, double *) const;
+  void compute_interaction_sites(double *, double *, double *, double *) const override;
 };
 
 }    // namespace LAMMPS_NS

src/CLASS2/bond_class2.h

@@ -27,15 +27,15 @@ namespace LAMMPS_NS {
 class BondClass2 : public Bond {
  public:
   BondClass2(class LAMMPS *);
-  virtual ~BondClass2();
-  virtual void compute(int, int);
-  virtual void coeff(int, char **);
-  double equilibrium_distance(int);
-  void write_restart(FILE *);
-  virtual void read_restart(FILE *);
-  void write_data(FILE *);
-  double single(int, double, int, int, double &);
-  virtual void *extract(const char *, int &);
+  ~BondClass2() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_data(FILE *) override;
+  double single(int, double, int, int, double &) override;
+  void *extract(const char *, int &) override;
 
  protected:
   double *r0, *k2, *k3, *k4;

src/EXTRA-MOLECULE/bond_fene_nm.h

@@ -26,22 +26,22 @@ namespace LAMMPS_NS {
 class BondFENENM : public BondFENE {
  public:
   BondFENENM(class LAMMPS *);
-  virtual ~BondFENENM();
-  virtual void compute(int, int);
-  virtual void coeff(int, char **);
-  void init_style();
-  double equilibrium_distance(int);
-  virtual void write_restart(FILE *);
-  void read_restart(FILE *);
-  void write_data(FILE *);
-  double single(int, double, int, int, double &);
-  virtual void *extract(const char *, int &);
+  ~BondFENENM() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  void init_style() override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_data(FILE *) override;
+  double single(int, double, int, int, double &) override;
+  void *extract(const char *, int &) override;
 
  protected:
   double TWO_1_3;
   double *nn, *mm;
 
-  virtual void allocate();
+  void allocate() override;
 };
 }    // namespace LAMMPS_NS
 

src/EXTRA-MOLECULE/bond_gaussian.h

@@ -27,14 +27,14 @@ namespace LAMMPS_NS {
 class BondGaussian : public Bond {
  public:
   BondGaussian(class LAMMPS *);
-  virtual ~BondGaussian();
-  virtual void compute(int, int);
-  virtual void coeff(int, char **);
-  double equilibrium_distance(int);
-  void write_restart(FILE *);
-  virtual void read_restart(FILE *);
-  void write_data(FILE *);
-  double single(int, double, int, int, double &);
+  ~BondGaussian() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_data(FILE *) override;
+  double single(int, double, int, int, double &) override;
 
  protected:
   int *nterms;

src/EXTRA-MOLECULE/bond_harmonic_shift.h

@@ -27,14 +27,14 @@ namespace LAMMPS_NS {
 class BondHarmonicShift : public Bond {
  public:
   BondHarmonicShift(class LAMMPS *);
-  virtual ~BondHarmonicShift();
-  virtual void compute(int, int);
-  void coeff(int, char **);
-  double equilibrium_distance(int);
-  void write_restart(FILE *);
-  void read_restart(FILE *);
-  void write_data(FILE *);
-  double single(int, double, int, int, double &);
+  ~BondHarmonicShift() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_data(FILE *) override;
+  double single(int, double, int, int, double &) override;
 
  protected:
   double *k, *r0, *r1;

src/EXTRA-MOLECULE/bond_harmonic_shift_cut.h

@@ -27,14 +27,14 @@ namespace LAMMPS_NS {
 class BondHarmonicShiftCut : public Bond {
  public:
   BondHarmonicShiftCut(class LAMMPS *);
-  virtual ~BondHarmonicShiftCut();
-  virtual void compute(int, int);
-  void coeff(int, char **);
-  double equilibrium_distance(int);
-  void write_restart(FILE *);
-  void read_restart(FILE *);
-  void write_data(FILE *);
-  double single(int, double, int, int, double &);
+  ~BondHarmonicShiftCut() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_data(FILE *) override;
+  double single(int, double, int, int, double &) override;
 
  protected:
   double *k, *r0, *r1;

src/EXTRA-MOLECULE/bond_nonlinear.h

@@ -27,15 +27,15 @@ namespace LAMMPS_NS {
 class BondNonlinear : public Bond {
  public:
   BondNonlinear(class LAMMPS *);
-  virtual ~BondNonlinear();
-  virtual void compute(int, int);
-  void coeff(int, char **);
-  double equilibrium_distance(int);
-  void write_restart(FILE *);
-  void read_restart(FILE *);
-  void write_data(FILE *);
-  double single(int, double, int, int, double &);
-  virtual void *extract(const char *, int &);
+  ~BondNonlinear() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_data(FILE *) override;
+  double single(int, double, int, int, double &) override;
+  void *extract(const char *, int &) override;
 
  protected:
   double *epsilon, *r0, *lamda;

src/INTEL/bond_fene_intel.h

@@ -33,9 +33,9 @@ namespace LAMMPS_NS {
 class BondFENEIntel : public BondFENE {
  public:
   BondFENEIntel(class LAMMPS *);
-  virtual ~BondFENEIntel();
-  virtual void compute(int, int);
-  virtual void init_style();
+  ~BondFENEIntel() override;
+  void compute(int, int) override;
+  void init_style() override;
 
  protected:
   FixIntel *fix;

src/INTEL/bond_harmonic_intel.h

@@ -33,9 +33,9 @@ namespace LAMMPS_NS {
 class BondHarmonicIntel : public BondHarmonic {
  public:
   BondHarmonicIntel(class LAMMPS *);
-  virtual ~BondHarmonicIntel();
-  virtual void compute(int, int);
-  virtual void init_style();
+  ~BondHarmonicIntel() override;
+  void compute(int, int) override;
+  void init_style() override;
 
  protected:
   FixIntel *fix;

src/INTEL/fix_intel.h

@@ -40,27 +40,27 @@ template <class flt_t, class acc_t> class IntelBuffers;
 class FixIntel : public Fix {
  public:
   FixIntel(class LAMMPS *, int, char **);
-  virtual ~FixIntel();
-  virtual int setmask();
-  virtual void init();
-  virtual void setup(int);
-  inline void min_setup(int in) { setup(in); }
-  void setup_pre_reverse(int eflag = 0, int vflag = 0);
+  ~FixIntel() override;
+  int setmask() override;
+  void init() override;
+  void setup(int) override;
+  inline void min_setup(int in) override { setup(in); }
+  void setup_pre_reverse(int eflag = 0, int vflag = 0) override;
 
   bool pair_hybrid_check();
   void pair_init_check(const bool cdmessage = false);
   void bond_init_check();
   void kspace_init_check();
 
-  void pre_reverse(int eflag = 0, int vflag = 0);
-  inline void min_pre_reverse(int eflag = 0, int vflag = 0) { pre_reverse(eflag, vflag); }
+  void pre_reverse(int eflag = 0, int vflag = 0) override;
+  inline void min_pre_reverse(int eflag = 0, int vflag = 0) override { pre_reverse(eflag, vflag); }
 
-  void post_run() { _print_pkg_info = 1; }
+  void post_run() override { _print_pkg_info = 1; }
 
   // Get all forces, calculation results from coprocesser
   void sync_coprocessor();
 
-  double memory_usage();
+  double memory_usage() override;
 
   typedef struct {
     double x, y, z;

src/KOKKOS/bond_class2_kokkos.h

@@ -40,10 +40,10 @@ class BondClass2Kokkos : public BondClass2 {
   typedef EV_FLOAT value_type;
 
   BondClass2Kokkos(class LAMMPS *);
-  virtual ~BondClass2Kokkos();
-  void compute(int, int);
-  void coeff(int, char **);
-  void read_restart(FILE *);
+  ~BondClass2Kokkos() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  void read_restart(FILE *) override;
 
   template<int NEWTON_BOND, int EVFLAG>
   KOKKOS_INLINE_FUNCTION

src/KOKKOS/bond_fene_kokkos.h

@@ -39,10 +39,10 @@ class BondFENEKokkos : public BondFENE {
   typedef ArrayTypes<DeviceType> AT;
 
   BondFENEKokkos(class LAMMPS *);
-  virtual ~BondFENEKokkos();
-  void compute(int, int);
-  void coeff(int, char **);
-  void read_restart(FILE *);
+  ~BondFENEKokkos() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  void read_restart(FILE *) override;
 
   template<int NEWTON_BOND, int EVFLAG>
   KOKKOS_INLINE_FUNCTION
@@ -92,7 +92,7 @@ class BondFENEKokkos : public BondFENE {
   typename AT::t_ffloat_1d d_epsilon;
   typename AT::t_ffloat_1d d_sigma;
 
-  void allocate();
+  void allocate() override;
 };
 
 }

src/KOKKOS/bond_harmonic_kokkos.h

@@ -39,10 +39,10 @@ class BondHarmonicKokkos : public BondHarmonic {
   typedef EV_FLOAT value_type;
 
   BondHarmonicKokkos(class LAMMPS *);
-  virtual ~BondHarmonicKokkos();
-  void compute(int, int);
-  void coeff(int, char **);
-  void read_restart(FILE *);
+  ~BondHarmonicKokkos() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  void read_restart(FILE *) override;
 
   template<int NEWTON_BOND, int EVFLAG>
   KOKKOS_INLINE_FUNCTION
@@ -79,7 +79,7 @@ class BondHarmonicKokkos : public BondHarmonic {
   typename AT::t_ffloat_1d d_k;
   typename AT::t_ffloat_1d d_r0;
 
-  void allocate();
+  void allocate() override;
 };
 
 }

src/MISC/bond_special.h

@@ -29,15 +29,15 @@ namespace LAMMPS_NS {
 class BondSpecial : public Bond {
  public:
   BondSpecial(class LAMMPS *);
-  virtual ~BondSpecial();
-  void init_style();
-  void compute(int, int);
-  void coeff(int, char **);
-  double equilibrium_distance(int);
-  void write_restart(FILE *);
-  void read_restart(FILE *);
-  void write_data(FILE *);
-  double single(int, double, int, int, double &);
+  ~BondSpecial() override;
+  void init_style() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_data(FILE *) override;
+  double single(int, double, int, int, double &) override;
 
  protected:
   double *factor_lj, *factor_coul;

src/MOLECULE/bond_fene.h

@@ -27,16 +27,16 @@ namespace LAMMPS_NS {
 class BondFENE : public Bond {
  public:
   BondFENE(class LAMMPS *lmp) : Bond(lmp) {}
-  virtual ~BondFENE();
-  virtual void compute(int, int);
-  virtual void coeff(int, char **);
-  void init_style();
-  double equilibrium_distance(int);
-  virtual void write_restart(FILE *);
-  void read_restart(FILE *);
-  void write_data(FILE *);
-  double single(int, double, int, int, double &);
-  virtual void *extract(const char *, int &);
+  ~BondFENE() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  void init_style() override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_data(FILE *) override;
+  double single(int, double, int, int, double &) override;
+  void *extract(const char *, int &) override;
 
  protected:
   double *k, *r0, *epsilon, *sigma;

src/MOLECULE/bond_fene_expand.h

@@ -27,15 +27,15 @@ namespace LAMMPS_NS {
 class BondFENEExpand : public Bond {
  public:
   BondFENEExpand(class LAMMPS *lmp) : Bond(lmp) {}
-  virtual ~BondFENEExpand();
-  virtual void compute(int, int);
-  void coeff(int, char **);
-  void init_style();
-  double equilibrium_distance(int);
-  void write_restart(FILE *);
-  void read_restart(FILE *);
-  void write_data(FILE *);
-  double single(int, double, int, int, double &);
+  ~BondFENEExpand() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  void init_style() override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_data(FILE *) override;
+  double single(int, double, int, int, double &) override;
 
  protected:
   double *k, *r0, *epsilon, *sigma, *shift;

src/MOLECULE/bond_gromos.h

@@ -27,15 +27,15 @@ namespace LAMMPS_NS {
 class BondGromos : public Bond {
  public:
   BondGromos(class LAMMPS *);
-  virtual ~BondGromos();
-  virtual void compute(int, int);
-  void coeff(int, char **);
-  double equilibrium_distance(int);
-  void write_restart(FILE *);
-  void read_restart(FILE *);
-  void write_data(FILE *);
-  double single(int, double, int, int, double &);
-  virtual void *extract(const char *, int &);
+  ~BondGromos() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_data(FILE *) override;
+  double single(int, double, int, int, double &) override;
+  void *extract(const char *, int &) override;
 
  protected:
   double *k, *r0;

src/MOLECULE/bond_harmonic.h

@@ -27,15 +27,15 @@ namespace LAMMPS_NS {
 class BondHarmonic : public Bond {
  public:
   BondHarmonic(class LAMMPS *);
-  virtual ~BondHarmonic();
-  virtual void compute(int, int);
-  virtual void coeff(int, char **);
-  double equilibrium_distance(int);
-  void write_restart(FILE *);
-  virtual void read_restart(FILE *);
-  void write_data(FILE *);
-  double single(int, double, int, int, double &);
-  virtual void *extract(const char *, int &);
+  ~BondHarmonic() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_data(FILE *) override;
+  double single(int, double, int, int, double &) override;
+  void *extract(const char *, int &) override;
 
  protected:
   double *k, *r0;

src/MOLECULE/bond_morse.h

@@ -27,15 +27,15 @@ namespace LAMMPS_NS {
 class BondMorse : public Bond {
  public:
   BondMorse(class LAMMPS *);
-  virtual ~BondMorse();
-  virtual void compute(int, int);
-  void coeff(int, char **);
-  double equilibrium_distance(int);
-  void write_restart(FILE *);
-  void read_restart(FILE *);
-  void write_data(FILE *);
-  double single(int, double, int, int, double &);
-  virtual void *extract(const char *, int &);
+  ~BondMorse() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_data(FILE *) override;
+  double single(int, double, int, int, double &) override;
+  void *extract(const char *, int &) override;
 
  protected:
   double *d0, *alpha, *r0;

src/MOLECULE/bond_quartic.h

@@ -27,15 +27,15 @@ namespace LAMMPS_NS {
 class BondQuartic : public Bond {
  public:
   BondQuartic(class LAMMPS *);
-  virtual ~BondQuartic();
-  virtual void compute(int, int);
-  void coeff(int, char **);
-  void init_style();
-  double equilibrium_distance(int);
-  void write_restart(FILE *);
-  void read_restart(FILE *);
-  void write_data(FILE *);
-  double single(int, double, int, int, double &);
+  ~BondQuartic() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  void init_style() override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_data(FILE *) override;
+  double single(int, double, int, int, double &) override;
 
  protected:
   double TWO_1_3;

src/MOLECULE/bond_table.h

@@ -27,16 +27,16 @@ namespace LAMMPS_NS {
 class BondTable : public Bond {
  public:
   BondTable(class LAMMPS *);
-  virtual ~BondTable();
-  virtual void compute(int, int);
-  void settings(int, char **);
-  void coeff(int, char **);
-  double equilibrium_distance(int);
-  void write_restart(FILE *);
-  void read_restart(FILE *);
-  void write_restart_settings(FILE *);
-  void read_restart_settings(FILE *);
-  double single(int, double, int, int, double &);
+  ~BondTable() override;
+  void compute(int, int) override;
+  void settings(int, char **) override;
+  void coeff(int, char **) override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_restart_settings(FILE *) override;
+  void read_restart_settings(FILE *) override;
+  double single(int, double, int, int, double &) override;
 
  protected:
   int tabstyle, tablength;

src/OPENMP/bond_class2_omp.h

@@ -33,7 +33,7 @@ class BondClass2OMP : public BondClass2, public ThrOMP {
 
  public:
   BondClass2OMP(class LAMMPS *lmp);
-  virtual void compute(int, int);
+  void compute(int, int) override;
 
  private:
   template <int EVFLAG, int EFLAG, int NEWTON_BOND>

src/OPENMP/bond_fene_expand_omp.h

@@ -33,7 +33,7 @@ class BondFENEExpandOMP : public BondFENEExpand, public ThrOMP {
 
  public:
   BondFENEExpandOMP(class LAMMPS *lmp);
-  virtual void compute(int, int);
+  void compute(int, int) override;
 
  private:
   template <int EVFLAG, int EFLAG, int NEWTON_BOND>

src/OPENMP/bond_fene_omp.h

@@ -33,7 +33,7 @@ class BondFENEOMP : public BondFENE, public ThrOMP {
 
  public:
   BondFENEOMP(class LAMMPS *lmp);
-  virtual void compute(int, int);
+  void compute(int, int) override;
 
  private:
   template <int EVFLAG, int EFLAG, int NEWTON_BOND>

src/OPENMP/bond_gromos_omp.h

@@ -33,7 +33,7 @@ class BondGromosOMP : public BondGromos, public ThrOMP {
 
  public:
   BondGromosOMP(class LAMMPS *lmp);
-  virtual void compute(int, int);
+  void compute(int, int) override;
 
  private:
   template <int EVFLAG, int EFLAG, int NEWTON_BOND>

src/OPENMP/bond_harmonic_omp.h

@@ -33,7 +33,7 @@ class BondHarmonicOMP : public BondHarmonic, public ThrOMP {
 
  public:
   BondHarmonicOMP(class LAMMPS *lmp);
-  virtual void compute(int, int);
+  void compute(int, int) override;
 
  private:
   template <int EVFLAG, int EFLAG, int NEWTON_BOND>

src/OPENMP/bond_harmonic_shift_cut_omp.h

@@ -33,7 +33,7 @@ class BondHarmonicShiftCutOMP : public BondHarmonicShiftCut, public ThrOMP {
 
  public:
   BondHarmonicShiftCutOMP(class LAMMPS *lmp);
-  virtual void compute(int, int);
+  void compute(int, int) override;
 
  private:
   template <int EVFLAG, int EFLAG, int NEWTON_BOND>

src/OPENMP/bond_harmonic_shift_omp.h

@@ -33,7 +33,7 @@ class BondHarmonicShiftOMP : public BondHarmonicShift, public ThrOMP {
 
  public:
   BondHarmonicShiftOMP(class LAMMPS *lmp);
-  virtual void compute(int, int);
+  void compute(int, int) override;
 
  private:
   template <int EVFLAG, int EFLAG, int NEWTON_BOND>

src/OPENMP/bond_morse_omp.h

@@ -33,7 +33,7 @@ class BondMorseOMP : public BondMorse, public ThrOMP {
 
  public:
   BondMorseOMP(class LAMMPS *lmp);
-  virtual void compute(int, int);
+  void compute(int, int) override;
 
  private:
   template <int EVFLAG, int EFLAG, int NEWTON_BOND>

src/OPENMP/bond_nonlinear_omp.h

@@ -33,7 +33,7 @@ class BondNonlinearOMP : public BondNonlinear, public ThrOMP {
 
  public:
   BondNonlinearOMP(class LAMMPS *lmp);
-  virtual void compute(int, int);
+  void compute(int, int) override;
 
  private:
   template <int EVFLAG, int EFLAG, int NEWTON_BOND>

src/OPENMP/bond_quartic_omp.h

@@ -33,7 +33,7 @@ class BondQuarticOMP : public BondQuartic, public ThrOMP {
 
  public:
   BondQuarticOMP(class LAMMPS *lmp);
-  virtual void compute(int, int);
+  void compute(int, int) override;
 
  private:
   template <int EVFLAG, int EFLAG, int NEWTON_BOND>

src/OPENMP/bond_table_omp.h

@@ -33,7 +33,7 @@ class BondTableOMP : public BondTable, public ThrOMP {
 
  public:
   BondTableOMP(class LAMMPS *lmp);
-  virtual void compute(int, int);
+  void compute(int, int) override;
 
  private:
   template <int EVFLAG, int EFLAG, int NEWTON_BOND>

src/YAFF/bond_mm3.h

@@ -27,14 +27,14 @@ namespace LAMMPS_NS {
 class BondMM3 : public Bond {
  public:
   BondMM3(class LAMMPS *);
-  virtual ~BondMM3();
-  virtual void compute(int, int);
-  void coeff(int, char **);
-  double equilibrium_distance(int);
-  void write_restart(FILE *);
-  void read_restart(FILE *);
-  void write_data(FILE *);
-  double single(int, double, int, int, double &);
+  ~BondMM3() override;
+  void compute(int, int) override;
+  void coeff(int, char **) override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_data(FILE *) override;
+  double single(int, double, int, int, double &) override;
 
  protected:
   double *r0, *k2;

src/bond_deprecated.h

@@ -27,15 +27,14 @@ namespace LAMMPS_NS {
 class BondDeprecated : public Bond {
  public:
   BondDeprecated(class LAMMPS *lmp) : Bond(lmp) {}
-  virtual ~BondDeprecated() {}
 
-  virtual void compute(int, int) {}
-  virtual void settings(int, char **);
-  virtual void coeff(int, char **) {}
-  virtual double equilibrium_distance(int) { return 0.0; }
-  virtual void write_restart(FILE *) {}
-  virtual void read_restart(FILE *) {}
-  virtual double single(int, double, int, int, double &) { return 0.0; }
+  void compute(int, int) override {}
+  void settings(int, char **) override;
+  void coeff(int, char **) override {}
+  double equilibrium_distance(int) override { return 0.0; }
+  void write_restart(FILE *) override {}
+  void read_restart(FILE *) override {}
+  double single(int, double, int, int, double &) override { return 0.0; }
 };
 
 }    // namespace LAMMPS_NS

src/bond_hybrid.h

@@ -33,16 +33,16 @@ class BondHybrid : public Bond {
   char **keywords;    // keyword for each Bond style
 
   BondHybrid(class LAMMPS *);
-  ~BondHybrid();
-  void compute(int, int);
-  void settings(int, char **);
-  void coeff(int, char **);
-  void init_style();
-  double equilibrium_distance(int);
-  void write_restart(FILE *);
-  void read_restart(FILE *);
-  double single(int, double, int, int, double &);
-  double memory_usage();
+  ~BondHybrid() override;
+  void compute(int, int) override;
+  void settings(int, char **) override;
+  void coeff(int, char **) override;
+  void init_style() override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  double single(int, double, int, int, double &) override;
+  double memory_usage() override;
 
  private:
   int *map;           // which style each bond type points to

src/bond_zero.h

@@ -27,18 +27,18 @@ namespace LAMMPS_NS {
 class BondZero : public Bond {
  public:
   BondZero(class LAMMPS *);
-  virtual ~BondZero();
-  virtual void compute(int, int);
-  virtual void settings(int, char **);
+  ~BondZero() override;
+  void compute(int, int) override;
+  void settings(int, char **) override;
 
-  void coeff(int, char **);
-  double equilibrium_distance(int);
-  void write_restart(FILE *);
-  void read_restart(FILE *);
-  void write_data(FILE *);
+  void coeff(int, char **) override;
+  double equilibrium_distance(int) override;
+  void write_restart(FILE *) override;
+  void read_restart(FILE *) override;
+  void write_data(FILE *) override;
 
-  double single(int, double, int, int, double &);
-  virtual void *extract(const char *, int &);
+  double single(int, double, int, int, double &) override;
+  void *extract(const char *, int &) override;
 
  protected:
   double *r0;