Merge commit '147125babfc18abf586237344d6dab5a4bd1e79f' as 'libs/cli11'

libs/cli11/examples/digit_args.cpp

@@ -0,0 +1,21 @@
+// Copyright (c) 2017-2022, University of Cincinnati, developed by Henry Schreiner
+// under NSF AWARD 1414736 and by the respective contributors.
+// All rights reserved.
+//
+// SPDX-License-Identifier: BSD-3-Clause
+
+#include <CLI/CLI.hpp>
+#include <iostream>
+
+int main(int argc, char **argv) {
+    CLI::App app;
+
+    int val{0};
+    // add a set of flags with default values associate with them
+    app.add_flag("-1{1},-2{2},-3{3},-4{4},-5{5},-6{6}, -7{7}, -8{8}, -9{9}", val, "compression level");
+
+    CLI11_PARSE(app, argc, argv);
+
+    std::cout << "value = " << val << std::endl;
+    return 0;
+}