provide Command base class in command.h for deriving command styles from

src/command.h

@@ -0,0 +1,29 @@
+/* -*- c++ -*- ----------------------------------------------------------
+   LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
+   http://lammps.sandia.gov, Sandia National Laboratories
+   Steve Plimpton, sjplimp@sandia.gov
+
+   Copyright (2003) Sandia Corporation.  Under the terms of Contract
+   DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
+   certain rights in this software.  This software is distributed under
+   the GNU General Public License.
+
+   See the README file in the top-level LAMMPS directory.
+------------------------------------------------------------------------- */
+
+#ifndef LMP_COMMAND_H
+#define LMP_COMMAND_H
+
+#include "pointers.h"
+
+namespace LAMMPS_NS {
+
+class Command : protected Pointers {
+ public:
+  Command(class LAMMPS *lmp) : Pointers(lmp) {};
+  virtual void command(int, char **) = 0;
+};
+
+}
+
+#endif