;;;
;;;	Copyright (c) 1985 Massachusetts Institute of Technology
;;;
;;;	This material was developed by the Scheme project at the
;;;	Massachusetts Institute of Technology, Department of
;;;	Electrical Engineering and Computer Science.  Permission to
;;;	copy this software, to redistribute it, and to use it for any
;;;	purpose is granted, subject to the following restrictions and
;;;	understandings.
;;;
;;;	1. Any copy made of this software must include this copyright
;;;	notice in full.
;;;
;;;	2. Users of this software agree to make their best efforts (a)
;;;	to return to the MIT Scheme project any improvements or
;;;	extensions that they make, so that these may be included in
;;;	future releases; and (b) to inform MIT of noteworthy uses of
;;;	this software.
;;;
;;;	3.  All materials developed as a consequence of the use of
;;;	this software shall duly acknowledge such use, in accordance
;;;	with the usual standards of acknowledging credit in academic
;;;	research.
;;;
;;;	4. MIT has made no warrantee or representation that the
;;;	operation of this software will be error-free, and MIT is
;;;	under no obligation to provide any services, by way of
;;;	maintenance, update, or otherwise.
;;;
;;;	5.  In conjunction with products arising from the use of this
;;;	material, there shall be no use of the name of the
;;;	Massachusetts Institute of Technology nor of any adaptation
;;;	thereof in any advertising, promotional, or sales literature
;;;	without prior written consent from MIT in each case.
;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;;     Modified by Texas Instruments Inc 8/15/85
;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(macro define-initial-command-key
  (lambda (e)
    (let ((bvl (cadr e))
          (description (caddr e))
          (key-commands (cadddr e))
          (body (cddddr e)))
      (let ((name (car bvl))
            (arg-names (mapcar (lambda (arg) (if (pair? arg) (car arg) arg))
                               (cdr bvl)))
            (arg-inits (mapcar (lambda (arg)
                                 (if (pair? arg) (cadr arg) #!FALSE))
                               (cdr bvl))))
        (let ((procedure-name
                (string->symbol (string-append (canonicalize-name-string name)
                                               "-COMMAND"))))
          `(begin
             (let ()
               (define (procedure ,@arg-names)
                        ,@(map2 (lambda (arg-name arg-init)
                                  `(if (not ,arg-name)
                                       (set! ,arg-name ,arg-init)))
                                arg-names arg-inits)
                        ,@body)
               ,@key-commands)))))))