C++ Option::getMiscFlags方法代码示例

/// GetOptionInfo - Scan the list of registered options, turning them into data
/// structures that are easier to handle.
static void GetOptionInfo(std::vector<Option*> &PositionalOpts,
                          std::vector<Option*> &SinkOpts,
                          std::map<std::string, Option*> &OptionsMap) {
  std::vector<const char*> OptionNames;
  Option *CAOpt = 0;  // The ConsumeAfter option if it exists.
  for (Option *O = RegisteredOptionList; O; O = O->getNextRegisteredOption()) {
    // If this option wants to handle multiple option names, get the full set.
    // This handles enum options like "-O1 -O2" etc.
    O->getExtraOptionNames(OptionNames);
    if (O->ArgStr[0])
      OptionNames.push_back(O->ArgStr);

    // Handle named options.
    for (size_t i = 0, e = OptionNames.size(); i != e; ++i) {
      // Add argument to the argument map!
      if (!OptionsMap.insert(std::pair<std::string,Option*>(OptionNames[i],
                                                            O)).second) {
        cerr << ProgramName << ": CommandLine Error: Argument '"
             << OptionNames[i] << "' defined more than once!\n";
      }
    }

    OptionNames.clear();

    // Remember information about positional options.
    if (O->getFormattingFlag() == cl::Positional)
      PositionalOpts.push_back(O);
    else if (O->getMiscFlags() & cl::Sink) // Remember sink options
      SinkOpts.push_back(O);
    else if (O->getNumOccurrencesFlag() == cl::ConsumeAfter) {
      if (CAOpt)
        O->error("Cannot specify more than one option with cl::ConsumeAfter!");
      CAOpt = O;
    }
  }

  if (CAOpt)
    PositionalOpts.push_back(CAOpt);

  // Make sure that they are in order of registration not backwards.
  std::reverse(PositionalOpts.begin(), PositionalOpts.end());
}

//.........这里部分代码省略.........
      OptionListChanged = false;
    }

    // Check to see if this is a positional argument.  This argument is
    // considered to be positional if it doesn't start with '-', if it is "-"
    // itself, or if we have seen "--" already.
    //
    if (argv[i][0] != '-' || argv[i][1] == 0 || DashDashFound) {
      // Positional argument!
      if (ActivePositionalArg) {
        ProvidePositionalOption(ActivePositionalArg, argv[i], i);
        continue;  // We are done!
      } else if (!PositionalOpts.empty()) {
        PositionalVals.push_back(std::make_pair(argv[i],i));

        // All of the positional arguments have been fulfulled, give the rest to
        // the consume after option... if it's specified...
        //
        if (PositionalVals.size() >= NumPositionalRequired &&
            ConsumeAfterOpt != 0) {
          for (++i; i < argc; ++i)
            PositionalVals.push_back(std::make_pair(argv[i],i));
          break;   // Handle outside of the argument processing loop...
        }

        // Delay processing positional arguments until the end...
        continue;
      }
    } else if (argv[i][0] == '-' && argv[i][1] == '-' && argv[i][2] == 0 &&
               !DashDashFound) {
      DashDashFound = true;  // This is the mythical "--"?
      continue;              // Don't try to process it as an argument itself.
    } else if (ActivePositionalArg &&
               (ActivePositionalArg->getMiscFlags() & PositionalEatsArgs)) {
      // If there is a positional argument eating options, check to see if this
      // option is another positional argument.  If so, treat it as an argument,
      // otherwise feed it to the eating positional.
      ArgName = argv[i]+1;
      Handler = LookupOption(ArgName, Value, Opts);
      if (!Handler || Handler->getFormattingFlag() != cl::Positional) {
        ProvidePositionalOption(ActivePositionalArg, argv[i], i);
        continue;  // We are done!
      }

    } else {     // We start with a '-', must be an argument...
      ArgName = argv[i]+1;
      Handler = LookupOption(ArgName, Value, Opts);

      // Check to see if this "option" is really a prefixed or grouped argument.
      if (Handler == 0) {
        std::string RealName(ArgName);
        if (RealName.size() > 1) {
          size_t Length = 0;
          Option *PGOpt = getOptionPred(RealName, Length, isPrefixedOrGrouping,
                                        Opts);

          // If the option is a prefixed option, then the value is simply the
          // rest of the name...  so fall through to later processing, by
          // setting up the argument name flags and value fields.
          //
          if (PGOpt && PGOpt->getFormattingFlag() == cl::Prefix) {
            Value = ArgName+Length;
            assert(Opts.find(std::string(ArgName, Value)) != Opts.end() &&
                   Opts.find(std::string(ArgName, Value))->second == PGOpt);
            Handler = PGOpt;
          } else if (PGOpt) {