# bool, short only
h
# bool, short and long
h/help
# bool, short and long but the short var cannot be used
h-help
# required val, short and long but the short var cannot be used
h-help=
# optional val, short and long valid
h/help=?
# optional val, short and long but the short var cannot be used
h-help=?
# repeated val, short and long valid
h/help=+
# repeated val, short and long but short not valid
h-help=+
# repeated val, short only
h=+
h=+