451     using DriverID = clang::driver::options::ID;  in rulesFor()  typedef
456     DriverID PrevAlias[DriverID::LastOption] = {DriverID::OPT_INVALID};  in rulesFor()
457     DriverID NextAlias[DriverID::LastOption] = {DriverID::OPT_INVALID};  in rulesFor()
458     auto AddAlias = [&](DriverID Self, DriverID T) {  in rulesFor()
467     const char *const *Prefixes[DriverID::LastOption] = {nullptr};  in rulesFor()
471   Prefixes[DriverID::OPT_##ID] = PREFIX;  in rulesFor()
477       DriverID ID;  in rulesFor()
478       DriverID AliasID;  in rulesFor()
483   {DriverID::OPT_##ID, DriverID::OPT_##ALIAS, ALIASARGS},  in rulesFor()
488       if (E.AliasID != DriverID::OPT_INVALID && E.AliasArgs == nullptr)  in rulesFor()
494     for (unsigned ID = 1 /*Skip INVALID */; ID < DriverID::LastOption; ++ID) {  in rulesFor()
495       if (PrevAlias[ID] || ID == DriverID::OPT_Xclang)  in rulesFor()
499       for (unsigned A = ID; A != DriverID::OPT_INVALID; A = NextAlias[A]) {  in rulesFor()