Square brackets with carrot in regex - negated ranges or sets

If we add carrot ^ in ranges or sets - we can negate them.
http[^s] - http is not followed by s. Example:

egrep 'http[^s]' /etc/ipp-usb/ipp-usb.conf

Output:

  http-min-port = 60000
  http-max-port = 65535
  #   trace-ipp, trace-escl, trace-http - very detailed per-protocol traces

Or another example - after slash / it shound't be lowercase letter:

egrep '/[^a-z]' /etc/apparmor/parser.conf

Output:

# match-string "pattern=aadfa audit perms=crwxamlk/ user::other"
### https://gitlab.com/apparmor/apparmor/-/wikis/AppArmorpolicyfeaturesabi