tryParsePort()

fl::optional< u16 > fl::net::tryParsePort ( i64 value )

inline

Convert an untrusted integer to a port number.

Returns

the port when value lies in [1, 65535], otherwise nullopt. Callers must surface the empty case as an error rather than substituting a default, since a wrong port is indistinguishable from a working one until the connection fails.

Definition at line 35 of file port.h.

                                               {
    if (value < kMinPort || value > kMaxPort) {
        return fl::nullopt;
    }
    return fl::optional<u16>(static_cast<u16>(value));
}

References kMaxPort, fl::nullopt, and fl::type_rank< T >::value.