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;;; examples/box-dynamic-module/box-mixed.scm -- Scheme module using some
;;; functionality from the shared library libbox-module, but do not
;;; export procedures from the module.
;;; Commentary:
;;; This is the Scheme module box-mixed. It uses some functionality
;;; from the shared library libbox-module, but does not export it.
;;; Code:
;;; Author: Thomas Wawrzinek
;;; Date: 2001-06-08
;;; Changed: 2001-06-14 by martin, some commenting, cleanup and integration.
(define-module (box-mixed))
;; First, load the library.
;;
(load-extension "libbox-module" "scm_init_box")
;; Create a list of boxes, each containing one element from ARGS.
;;
(define (make-box-list . args)
(map (lambda (el)
(let ((b (make-box)))
(box-set! b el) b))
args))
;; Map the procedure FUNC over all elements of LST, which must be a
;; list of boxes. The result is a list of freshly allocated boxes,
;; each containing the result of an application of FUNC.
(define (box-map func lst)
(map (lambda (el)
(let ((b (make-box)))
(box-set! b (func (box-ref el)))
b))
lst))
;; Export the procedures, so that they can be used by others.
;;
(export make-box-list box-map)
;;; End of file.
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