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Atari Mega Archive 1
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Atari Mega Archive - Volume 1.iso
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xscheme.arc
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xscheme.ini
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1989-02-02
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915b
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37 lines
; xscheme.ini - initialization code for XScheme version 0.16
(load "macros.s")
(load "qquote.s")
; this version of EVAL knows about the optional enviroment parameter
(define (eval x #!optional env)
((if (default-object? env)
(compile x)
(compile x env))))
(define (autoload-from-file file syms #!optional env)
(map (lambda (sym) (put sym '%autoload file)) syms)
'())
(define (*unbound-handler* sym cont)
(let ((file (get sym '%autoload)))
(if file (load file))
(if (not (bound? sym))
(error "unbound variable" sym))
(cont '())))
(define head car)
(define (tail x) (force (cdr x)))
(define empty-stream? null?)
(define the-empty-stream '())
(macro cons-stream
(lambda (x)
(list 'cons (cadr x) (list 'delay (caddr x)))))
(macro make-environment
(lambda (x)
(append '(let ()) (cdr x) '((the-environment)))))
(define initial-user-environment (the-environment))