34 lines
906 B
Scheme
34 lines
906 B
Scheme
;;; CTAK -- A version of the TAK procedure that uses continuations.
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(library (r6rs-benchmarks ctak)
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(export main)
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(import (r6rs) (r6rs-benchmarks))
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(define (ctak x y z)
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(call-with-current-continuation
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(lambda (k) (ctak-aux k x y z))))
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(define (ctak-aux k x y z)
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(if (not (< y x))
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(k z)
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(call-with-current-continuation
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(lambda (k)
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(ctak-aux
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k
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(call-with-current-continuation
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(lambda (k) (ctak-aux k (- x 1) y z)))
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(call-with-current-continuation
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(lambda (k) (ctak-aux k (- y 1) z x)))
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(call-with-current-continuation
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(lambda (k) (ctak-aux k (- z 1) x y))))))))
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(define (main . args)
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(run-benchmark
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"ctak"
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ctak-iters
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(lambda (result) (equal? result 7))
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(lambda (x y z) (lambda () (ctak x y z)))
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18
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12
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6)))
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