add a "deprecated" command style for flagging future removed commands

src/deprecated.cpp

@@ -0,0 +1,48 @@
+/* ----------------------------------------------------------------------
+   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.
+------------------------------------------------------------------------- */
+
+/* ----------------------------------------------------------------------
+   Contributing authors:  Axel Kohlmeyer (Temple U),
+------------------------------------------------------------------------- */
+
+#include <cstring>
+#include "deprecated.h"
+#include "comm.h"
+#include "force.h"
+#include "error.h"
+#include "input.h"
+
+using namespace LAMMPS_NS;
+
+static void writemsg(LAMMPS *lmp, const char *msg, int abend=1)
+{
+  if (lmp->comm->me == 0) {
+    if (lmp->screen) fputs(msg,lmp->screen);
+    if (lmp->logfile) fputs(msg,lmp->logfile);
+  }
+  if (abend)
+    lmp->error->all(FLERR,"This command is no longer available");
+}
+
+/* ---------------------------------------------------------------------- */
+
+void Deprecated::command(int narg, char **arg)
+{
+  if (strcmp(input->command,"deprecated") == 0) {
+    writemsg(lmp,"\nCommand 'deprecated' is a dummy command\n\n",0);
+
+  } else if (strcmp(input->command,"XXX") == 0) {
+    writemsg(lmp, "\nCommand 'XXX' has been removed from LAMMPS "
+             "after the\n## XXX 20## stable release.\n\n");
+  }
+}