Function MutuallyExclusiveHandler

library/cpp/getopt/small/last_getopt_opts.cpp:237–245

    namespace {
        auto MutuallyExclusiveHandler(const TOpt* cur, const TOpt* other) {
            return [cur, other](const TOptsParser* p) {
                if (p->Seen(other)) {
                    throw TUsageException()
                        << "option " << cur->ToShortString()
                        << " can't appear together with option " << other->ToShortString();
                }
            };
        }
    }

    void TOpts::MutuallyExclusiveOpt(TOpt& opt1, TOpt& opt2) {