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#include <iostream>
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#include <boost/program_options.hpp>
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namespace po = boost::program_options;
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int main(int argc, char *argv[])
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{
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po::variables_map vm;
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po::options_description gen("general options");
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gen.add_options()
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("int", po::value<int>(), "int test")
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("help,h", "Display this message.")
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("string", po::value<std::string>(), "string test")
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("vector", po::value<std::vector<std::string>>(), "vector test")
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("param", po::value<std::vector<std::string>>(), "param test");
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//位置参数项, 添加此项后可以不写 --param
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po::positional_options_description p;
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p.add("param", -1);
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try
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{
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po::store(po::command_line_parser(argc, argv)
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.options(gen) // Parse options.
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.positional(p) // Remainder as --param.
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.run(),
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vm);
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po::notify(vm); // Invoke option notify functions.
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}
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catch (std::exception const&)
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{
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std::cerr << "Incorrect command line syntax." << std::endl;
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std::cerr << "Use '--help' for a list of options." << std::endl;
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return 1;
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}
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if (vm.count("string"))
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std::cout << vm["string"].as<std::string>() << std::endl;
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if (vm.count("int"))
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std::cout << vm["int"].as<int>() << std::endl;
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if (vm.count("vector"))
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{
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auto &vs = vm["vector"].as<std::vector<std::string>>();
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for(auto &v : vs)
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{
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std::cout << v << " ";
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}
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std::cout << std::endl;
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}
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if (vm.count("help"))
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{
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std::cerr << gen << std::endl;
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}
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if (!vm.count("param"))
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{
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std::cout << "no --param"<<std::endl;
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}
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else
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{
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std::cout << "param : ";
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auto &vs1 = vm["param"].as<std::vector<std::string>>();
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for (auto &v : vs1)
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{
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std::cout << v << " ";
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}
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std::cout << std::endl;
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}
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return 0;
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}
