25 lines
708 B
Scheme
25 lines
708 B
Scheme
;; Copyright 2002, 2003 Andreas Bernauer
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(define (make-callback function)
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(call-with-current-continuation
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(lambda (exit)
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(let* ((req (send/suspend (lambda (new-url)
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(exit new-url)))))
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(function req)))))
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(define (make-annotated-callback function)
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(let* ((annotated-address (make-annotated-address))
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(dispatch
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(lambda (req)
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(let ((bindings (get-bindings req)))
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(cond
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((returned-via annotated-address bindings) =>
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(lambda (args)
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(apply function (cons req args))))
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(else
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(error "annotated-callback:
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unexpected return values from website"))))))
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(callback (make-callback dispatch)))
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(lambda args
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(annotated-address callback args)))) |