21 lines
363 B
Scheme
21 lines
363 B
Scheme
(define-library (picrin control list)
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(import (scheme base)
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(picrin control))
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(define-syntax for
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(syntax-rules ()
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((_ expr)
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(reset (lambda () expr)))))
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(define (in m)
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(shift (lambda (k)
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(apply append (map k m)))))
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(define (yield x)
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(list x))
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(define (null . x)
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'())
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(export for in yield null))
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