我正在尝试使用Boost 1.58.0解析命令行。我的代码非常简单,可以从教程中复制\粘贴。看起来像这样:
try {
po::options_description desc;
desc.add_options()
("version,v", "Display version of application.");
po::positional_options_description p;
p.add("input-file", -1);
try
{
po::store(po::command_line_parser(argc, argv).
options(desc).positional(p).run(), vm);
if ( vm.count("version") )
{
std::cout << "Program version: " << SHUF_T_VERSION << std::endl << "Boost library version: " << BOOST_LIB_VERSION << std::endl;
return false;
}
po::notify(vm); // throws on error, so do after help in case
// there are any problems
}
catch(po::error& e)
{
std::cerr << "ERROR: " << e.what() << std::endl << std::endl;
std::cerr << desc << std::endl;
return false;
}
}
catch(std::exception& e)
{
std::cerr << "Unhandled Exception: "
<< e.what() << ", application will now exit" << std::endl;
return false;
}
return true;
整个代码是here。
该代码似乎是正确的。
app -v
已正确处理。但是,如果我包含任何位置争议,例如app myfile
,po::store()
就会抛出unrecognised option 'myfile'
。有什么想法为什么会发生? 最佳答案
您需要添加“输入文件”作为选项:
po::options_description desc;
desc.add_options()
("version,v", "Display version of application.")
("input-file", po::value<std::vector<std::string> >(), "input file");
从the tutorial: