Squashed 'third_party/lisp/alexandria/' content from commit fc2a2f5c

git-subtree-dir: third_party/lisp/alexandria
git-subtree-split: fc2a2f5c34147bb4e3e4a350b04220de0263710f

1 files changed, 18 insertions, 0 deletions

diff --git a/arrays.lisp b/arrays.lisp
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+++ b/arrays.lisp
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+(in-package :alexandria)
+
+(defun copy-array (array &key (element-type (array-element-type array))
+                              (fill-pointer (and (array-has-fill-pointer-p array)
+                                                 (fill-pointer array)))
+                              (adjustable (adjustable-array-p array)))
+  "Returns an undisplaced copy of ARRAY, with same fill-pointer and
+adjustability (if any) as the original, unless overridden by the keyword
+arguments."
+ (let* ((dimensions (array-dimensions array))
+        (new-array (make-array dimensions
+                               :element-type element-type
+                               :adjustable adjustable
+                               :fill-pointer fill-pointer)))
+   (dotimes (i (array-total-size array))
+     (setf (row-major-aref new-array i)
+           (row-major-aref array i)))
+   new-array))