65 lines
2.8 KiB
Scheme
65 lines
2.8 KiB
Scheme
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;;;
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;;; Copyright (c) 1985 Massachusetts Institute of Technology
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;;;
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;;; This material was developed by the Scheme project at the
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;;; Massachusetts Institute of Technology, Department of
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;;; Electrical Engineering and Computer Science. Permission to
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;;; copy this software, to redistribute it, and to use it for any
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;;; purpose is granted, subject to the following restrictions and
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;;; understandings.
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;;;
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;;; 1. Any copy made of this software must include this copyright
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;;; notice in full.
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;;;
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;;; 2. Users of this software agree to make their best efforts (a)
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;;; to return to the MIT Scheme project any improvements or
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;;; extensions that they make, so that these may be included in
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;;; future releases; and (b) to inform MIT of noteworthy uses of
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;;; this software.
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;;;
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;;; 3. All materials developed as a consequence of the use of
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;;; this software shall duly acknowledge such use, in accordance
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;;; with the usual standards of acknowledging credit in academic
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;;; research.
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;;;
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;;; 4. MIT has made no warrantee or representation that the
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;;; operation of this software will be error-free, and MIT is
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;;; under no obligation to provide any services, by way of
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;;; maintenance, update, or otherwise.
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;;;
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;;; 5. In conjunction with products arising from the use of this
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;;; material, there shall be no use of the name of the
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;;; Massachusetts Institute of Technology nor of any adaptation
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;;; thereof in any advertising, promotional, or sales literature
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;;; without prior written consent from MIT in each case.
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;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;
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;;; Modified by Texas Instruments Inc 8/15/85
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;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(macro define-initial-command-key
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(lambda (e)
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(let ((bvl (cadr e))
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(description (caddr e))
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(key-commands (cadddr e))
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(body (cddddr e)))
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(let ((name (car bvl))
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(arg-names (mapcar (lambda (arg) (if (pair? arg) (car arg) arg))
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(cdr bvl)))
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(arg-inits (mapcar (lambda (arg)
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(if (pair? arg) (cadr arg) #!FALSE))
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(cdr bvl))))
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(let ((procedure-name
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(string->symbol (string-append (canonicalize-name-string name)
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"-COMMAND"))))
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`(begin
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(let ()
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(define (procedure ,@arg-names)
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,@(map2 (lambda (arg-name arg-init)
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`(if (not ,arg-name)
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(set! ,arg-name ,arg-init)))
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arg-names arg-inits)
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,@body)
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,@key-commands)))))))
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