option_groups.cpp
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#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;
}