boost :: program_options忽略配置文件中的选项

Question

请问您可以帮我boost::program_options？

我想解析器忽略保存在配置文件中未知的选项。 我知道allow_unregistered()可以用于cmd行选项，我该如何处理文本文件？

这里被剥离代码：

namespace po = boost::program_options; 
try { 
    string config_file; 
    string gps_source; 
    int op_baud; 

    po::options_description generic("Generic options"); 
    generic.add_options() 

     ("ssdvpacksize", po::value<int>(), 
       "ssdv packets size in bytes") 
     ("ssdvdir", po::value<string>()->default_value("/ARY1/ssdv"), 
       "ssdv image dir") 

     //unused 
     //I have to specify these even if they're unused 
     ("ssdvproc_dir", po::value<string>(), "") 
     ; 

    po::options_description file_options; 
    file_options.add(generic); 

    po::options_description cli_options("command line interface options"); 
    cli_options.add(generic); 
    cli_options.add_options() 
     ("config", po::value<string>(&config_file)->default_value("/boot/ary-1.cfg"), "name of a file of a configuration."); 


    po::variables_map vm; 
    store(po::command_line_parser(ac, av).options(cli_options).allow_unregistered().run(), vm); 
    //store(po::basic_command_line_parser<char>(ac, av).options(cli_options).allow_unregistered().run(), vm); 

    notify(vm); 

    ifstream ifs(config_file.c_str()); 
    if (!ifs) 
    { 
     cout << "Can not open config file: " << config_file << "\n"; 
    } 
    else 
    { 
     // probably smth. to do here ? 
     //store(parse_config_file(ifs, file_options).allow_unregistered(), vm); // does not work 
     store(parse_config_file(ifs, file_options), vm); 
     notify(vm); 
    } 

    // ... 
    // rest of program 

} 

Answer 1

OK，解决的办法是令人尴尬的容易。 44 行应该是：

store(parse_config_file(ifs, file_options, true/*allow unregistered*/), vm);