(use cli-max)

(define-arguments
  (verbose?     short: #\v long: 'verbose)
  (input-file   short: #\i value: 'FILE-NAME  required: #t)
  (input-filter long: 'filter value: '(* EXPRESSION))
  (limit        short: #\l value: 'NUMBER convert: to-number default: 10))

;; defines the following variables:

;; verbose?      -v, --verbose                 a boolean since no `value' option was given
;; input-file    -i, --input-file FILE-NAME    a string
;; input-filter  --filter FILTER               a list of zero or more strings, i.e. an optional
;;                                             argument which may be given multiple times
;; limit         -l, --limit NUMBER            a number, 10 if not given