25 std::string tokenizer(std::string::const_iterator& it,  in tokenizer()  argument
29     for (; it != end && std::isspace(*it); ++it);  in tokenizer()
30     if (it == end) return {};  in tokenizer()
32     auto start = it;  in tokenizer()
34     if (strchr(reserved, *it)) return {start, ++it};  in tokenizer()
36         ++it;  in tokenizer()
37         if (it == end || std::isspace(*it) || strchr(reserved, *it)) return {start, it};  in tokenizer()
44     for (auto it = flags.begin(); ; ) {  in split()  local
45         auto flag = tokenizer(it, flags.end(), delim);  in split()
50         auto token = tokenizer(it, flags.end(), delim);  in split()
63     for (auto it = devices.begin(); ; ) {  in getDeviceAddressPairs()  local
64         auto token = tokenizer(it, devices.end(), delim);  in getDeviceAddressPairs()
67         auto device = tokenizer(it, devices.end(), delim);  in getDeviceAddressPairs()
70         token = tokenizer(it, devices.end(), delim);  in getDeviceAddressPairs()
74         auto address = tokenizer(it, devices.end(), delim);  in getDeviceAddressPairs()
79             token = tokenizer(it, devices.end(), delim);  in getDeviceAddressPairs()
85         token = tokenizer(it, devices.end(), delim);  in getDeviceAddressPairs()