initial commit

libs/CLI11/examples/option_groups.cpp

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+// 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 <string>
+
+int main(int argc, char **argv) {
+
+    CLI::App app("data output specification");
+    app.set_help_all_flag("--help-all", "Expand all help");
+
+    auto *format = app.add_option_group("output_format", "formatting type for output");
+    auto *target = app.add_option_group("output target", "target location for the output");
+    bool csv{false};
+    bool human{false};
+    bool binary{false};
+    format->add_flag("--csv", csv, "specify the output in csv format");
+    format->add_flag("--human", human, "specify the output in human readable text format");
+    format->add_flag("--binary", binary, "specify the output in binary format");
+    // require one of the options to be selected
+    format->require_option(1);
+    std::string fileLoc;
+    std::string networkAddress;
+    target->add_option("-o,--file", fileLoc, "specify the file location of the output");
+    target->add_option("--address", networkAddress, "specify a network address to send the file");
+
+    // require at most one of the target options
+    target->require_option(0, 1);
+    CLI11_PARSE(app, argc, argv);
+
+    std::string format_type = (csv) ? std::string("CSV") : ((human) ? "human readable" : "binary");
+    std::cout << "Selected " << format_type << " format" << std::endl;
+    if(!fileLoc.empty()) {
+        std::cout << " sent to file " << fileLoc << std::endl;
+    } else if(!networkAddress.empty()) {
+        std::cout << " sent over network to " << networkAddress << std::endl;
+    } else {
+        std::cout << " sent to std::cout" << std::endl;
+    }
+
+    return 0;
+}