kupp1

# original work by Michael F. Lamb. License: GPLv3.
# added optional tilde before !user by kupp

RFC2812Matcher = ///
  ^ # We'll match the whole line. Start.
    # Optional prefix and the space that separates it
    # from the next thing. Prefix can be a servername,
    # or nick[[!user]@host]
  (?::(               # This whole set is optional but if it's
                      # here it begins with : and ends with space