core: assert-example program

src/core/examples/CMakeLists.txt

@@ -1,4 +1,5 @@
 set(base_examples
+    assert-example
     command-line-example
     fatal-example
     hash-example

src/core/examples/assert-example.cc

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2023 Lawrence Livermore National Laboratory
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Peter D. Barnes, Jr. <pdbarnes@llnl.gov>
+ */
+
+/**
+ * \file
+ * \ingroup core-examples
+ * \ingroup assert
+ * Example program illustrating the use of NS_ASSERT_MSG()
+ */
+
+#include "ns3/core-module.h"
+
+#include <iostream>
+
+using namespace ns3;
+
+NS_LOG_COMPONENT_DEFINE("AssertExample");
+
+int
+main(int argc, char** argv)
+{
+    CommandLine cmd;
+    cmd.Parse(argc, argv);
+
+    std::cout << "NS_ASSERT_MSG example\n"
+              << "  if an argument is given this example will assert.\n";
+
+    NS_ASSERT_MSG(argc == 1, "An argument was given, so we assert");
+
+    return 0;
+}