Apply override to Integrator classes

src/INTEL/verlet_lrt_intel.h

@@ -46,10 +46,10 @@ namespace LAMMPS_NS {
 class VerletLRTIntel : public Verlet {
  public:
   VerletLRTIntel(class LAMMPS *, int, char **);
-  virtual ~VerletLRTIntel();
-  virtual void init();
-  virtual void setup(int flag);
-  virtual void run(int);
+  ~VerletLRTIntel() override;
+  void init() override;
+  void setup(int flag) override;
+  void run(int) override;
 
  protected:
   PPPMIntel *_intel_kspace;

src/KOKKOS/verlet_kokkos.h

@@ -31,10 +31,10 @@ namespace LAMMPS_NS {
 class VerletKokkos : public Verlet {
  public:
   VerletKokkos(class LAMMPS *, int, char **);
-  ~VerletKokkos() {}
-  void setup(int);
-  void setup_minimal(int);
-  void run(int);
+  ~VerletKokkos() override = default;
+  void setup(int) override;
+  void setup_minimal(int) override;
+  void run(int) override;
 
   KOKKOS_INLINE_FUNCTION
   void operator() (const int& i) const {

src/OPENMP/respa_omp.h

@@ -28,13 +28,13 @@ namespace LAMMPS_NS {
 class RespaOMP : public Respa, public ThrOMP {
  public:
   RespaOMP(class LAMMPS *, int, char **);
-  virtual ~RespaOMP() {}
-  virtual void init();
-  virtual void setup(int);
-  virtual void setup_minimal(int);
+  ~RespaOMP() override = default;
+  void init() override;
+  void setup(int) override;
+  void setup_minimal(int) override;
 
  protected:
-  virtual void recurse(int);
+  void recurse(int) override;
 };
 
 }    // namespace LAMMPS_NS

src/REPLICA/verlet_split.h

@@ -27,12 +27,12 @@ namespace LAMMPS_NS {
 class VerletSplit : public Verlet {
  public:
   VerletSplit(class LAMMPS *, int, char **);
-  ~VerletSplit();
-  void init();
-  void setup(int);
-  void setup_minimal(int);
-  void run(int);
-  double memory_usage();
+  ~VerletSplit() override;
+  void init() override;
+  void setup(int) override;
+  void setup_minimal(int) override;
+  void run(int) override;
+  double memory_usage() override;
 
  private:
   int master;                            // 1 if an Rspace proc, 0 if Kspace

src/respa.h

@@ -46,13 +46,13 @@ class Respa : public Integrate {
   int pair_compute;       // 1 if pair force need to be computed
 
   Respa(class LAMMPS *, int, char **);
-  virtual ~Respa();
-  virtual void init();
-  virtual void setup(int);
-  virtual void setup_minimal(int);
-  virtual void run(int);
-  virtual void cleanup();
-  virtual void reset_dt();
+  ~Respa() override;
+  void init() override;
+  void setup(int) override;
+  void setup_minimal(int) override;
+  void run(int) override;
+  void cleanup() override;
+  void reset_dt() override;
 
   void copy_f_flevel(int);
   void copy_flevel_f(int);

src/verlet.h

@@ -27,12 +27,12 @@ namespace LAMMPS_NS {
 class Verlet : public Integrate {
  public:
   Verlet(class LAMMPS *, int, char **);
-  virtual ~Verlet() {}
-  virtual void init();
-  virtual void setup(int flag);
-  virtual void setup_minimal(int);
-  virtual void run(int);
-  void cleanup();
+  ~Verlet() override = default;
+  void init() override;
+  void setup(int flag) override;
+  void setup_minimal(int) override;
+  void run(int) override;
+  void cleanup() override;
 
  protected:
   int triclinic;    // 0 if domain is orthog, 1 if triclinic