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allow noop (index-rotate n n)

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Closes #965.
This commit is contained in:
Alex Shinn 2024-05-26 22:00:43 +09:00
parent c96b0123a0
commit 953f3ada23
2 changed files with 2 additions and 1 deletions
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2
lib/srfi/231/base.scm
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@ -24,7 +24,7 @@
(define (index-rotate n k)
(assert (and (exact-integer? n)
(exact-integer? k)
(< -1 k n)))
(<= 0 k n)))
(list->vector (append (iota (- n k) k) (iota k))))
(define (index-first n k)

1
lib/srfi/231/test.sld
View file

@ -926,6 +926,7 @@
(test-error (index-rotate 0 -2))
(test-error (index-rotate 3 5))
(test '#(3 4 0 1 2) (index-rotate 5 3))
(test '#(0 1 2 3 4) (index-rotate 5 5))
(test-error (index-swap 'a 3 0))
(test-error (index-swap 5 'a 0))