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Allow scm_XXX_writable_elements on empty vectors, even if immutable

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* libguile/array-handle.c (initialize_vector_handle): Set both element
  pointers to NULL if the vector is empty.
* libguile/array-map.c (racp): Ignore immutability if destination is
  empty.
* test-suite/tests/sort.test: Check empty/mutable/immutable vectors with
  sort!.
* test-suite/tests/array-map.test: Check array-copy! with
  empty/immutable destination.
This commit is contained in:
Daniel Llorens 2017-09-15 12:36:57 +02:00
parent 1008ea3154
commit 4212f29655
4 changed files with 30 additions and 12 deletions
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24
test-suite/tests/sort.test
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@ -74,7 +74,9 @@
(let* ((a (make-typed-array 'f64 0 99 3))
(v (make-shared-array a (lambda (i) (list (- 98 i) 0)) 99)))
(randomize-vector! v 99)
(sorted? (sort! v <) <)))
(sorted? (sort! v <) <))))
(with-test-prefix "stable-sort!"
(pass-if "stable-sort!"
(let ((v (randomize-vector! (make-vector 1000) 1000)))
@ -92,11 +94,6 @@
(randomize-vector! v 1000)
(sorted? (stable-sort! v <) <))))
;;;
;;; stable-sort
;;;
(with-test-prefix "stable-sort"
;; in guile 1.8.0 and 1.8.1 this test failed, an empty list provoked a
@ -108,3 +105,18 @@
;; behavior (integer underflow) leading to crashes.
(pass-if "empty vector"
(equal? '#() (stable-sort '#() <))))
(with-test-prefix "mutable/immutable arguments"
(with-test-prefix/c&e "immutable arguments"
(pass-if "sort! of empty vector"
(equal? #() (sort! (vector) <)))
(pass-if "sort of immutable vector"
(equal? #(0 1) (sort #(1 0) <))))
(pass-if-exception "sort! of mutable vector (compile)"
exception:wrong-type-arg
(compile '(sort! #(0) <) #:to 'value #:env (current-module))))