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Allow vector-append to take zero arguments

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Makes vector-append behave more like append, sequence-append, etc.
This commit is contained in:
Justin Slepak 2012-05-25 21:00:45 -04:00 committed by Vincent St-Amour
parent 74844152bc
commit 2f23f1b6b3
1 changed files with 2 additions and 3 deletions
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5
collects/racket/vector.rkt
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@ -169,9 +169,8 @@
(values (vector-copy* v 0 (unsafe-fx- len n))
(vector-copy* v (unsafe-fx- len n) len))))
(define (vector-append v . vs)
(let* ([vs (cons v vs)]
[lens (for/list ([e (in-list vs)] [i (in-naturals)])
(define (vector-append . vs)
(let* ([lens (for/list ([e (in-list vs)] [i (in-naturals)])
(if (vector? e)
(unsafe-vector-length e)
(raise-argument-error 'vector-append "vector?" e i)))]