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;; -*-theme-*-
;; Copyright (C) 2022 Tommi Höynälänmaa
;; Distributed under GNU Lesser General Public License version 3,
;; see file doc/LGPL-3.
;; Expected results: translation and running OK
(define-proper-program (examples command-line-demo)
(import (standard-library core)
(standard-library command-line-parser)
(standard-library list-utilities)
(standard-library console-io))
(define-main-proc (((l-args (:uniform-list <string>))) <none> nonpure)
(let-mutable ((str-output-file <string> "")
(b-flag <boolean> #f)
(str-input-file <string> ""))
(let* ((argdesc1
(create <argument-descriptor> #\f #f
(lambda (((str-option-arg <string>)) <none> nonpure)
(set! b-flag #t))))
(argdesc2
(create <argument-descriptor> "flag" #f
(lambda (((str-option-arg <string>)) <none> nonpure)
(set! b-flag #t))))
(argdesc3
(create <argument-descriptor> #\o #t
(lambda (((str-option-arg <string>)) <none> nonpure)
(set! str-output-file str-option-arg))))
(argdesc4
(create <argument-descriptor> "output-file" #t
(lambda (((str-option-arg <string>)) <none> nonpure)
(set! str-output-file str-option-arg))))
(proc-handle-proper-args
(lambda (((l-proper-args (:uniform-list <string>)))
<none> nonpure)
(if (= (length l-proper-args) 1)
(set! str-input-file
(uniform-list-ref l-proper-args 0))
(console-display-line "Invalid number of input files."))))
(l-arg-descs
(list argdesc1 argdesc2 argdesc3 argdesc4))
(l-args1 (drop l-args 1)))
(parse-command-line l-args1 l-arg-descs proc-handle-proper-args))
(console-display "input file: ")
(console-display-line str-input-file)
(console-display "output file: ")
(console-display-line str-output-file)
(if b-flag
(console-display-line "flag set")
(console-display-line "flag unset")))))
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