38 lines
945 B
Scheme
38 lines
945 B
Scheme
;;; CPSTAK -- A continuation-passing version of the TAK benchmark.
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;;; A good test of first class procedures and tail recursion.
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(library (r6rs-benchmarks cpstak)
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(export main)
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(import (r6rs) (r6rs-benchmarks))
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(define (cpstak x y z)
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(define (tak x y z k)
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(if (not (< y x))
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(k z)
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(tak (- x 1)
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y
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z
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(lambda (v1)
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(tak (- y 1)
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z
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x
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(lambda (v2)
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(tak (- z 1)
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x
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y
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(lambda (v3)
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(tak v1 v2 v3 k)))))))))
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(tak x y z (lambda (a) a)))
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(define (main . args)
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(run-benchmark
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"cpstak"
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cpstak-iters
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(lambda (result) (equal? result 7))
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(lambda (x y z) (lambda () (cpstak x y z)))
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18
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12
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6)))
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