Squashed 'libs/cli11/' content from commit dcbcb47

git-subtree-dir: libs/cli11
git-subtree-split: dcbcb4721dda5dab0a56d9faaaee50e6a30f7758

examples/ranges.cpp

@@ -0,0 +1,41 @@
+// 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>
+#include <vector>
+
+int main(int argc, char **argv) {
+
+    CLI::App app{"App to demonstrate exclusionary option groups."};
+
+    std::vector<int> range;
+    app.add_option("--range,-R", range, "A range")->expected(-2);
+
+    auto *ogroup = app.add_option_group("min_max_step", "set the min max and step");
+    int min{0}, max{0}, step{1};
+    ogroup->add_option("--min,-m", min, "The minimum")->required();
+    ogroup->add_option("--max,-M", max, "The maximum")->required();
+    ogroup->add_option("--step,-s", step, "The step")->capture_default_str();
+
+    app.require_option(1);
+
+    CLI11_PARSE(app, argc, argv);
+
+    if(!range.empty()) {
+        if(range.size() == 2) {
+            min = range[0];
+            max = range[1];
+        }
+        if(range.size() >= 3) {
+            step = range[0];
+            min = range[1];
+            max = range[2];
+        }
+    }
+    std::cout << "range is [" << min << ':' << step << ':' << max << "]\n";
+    return 0;
+}