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Obtain an immutable array from a mutable one #8826

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Apr 28, 2020
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Obtain an immutable array from a mutable one #8826

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6 changes: 6 additions & 0 deletions library/src/scala/IArray.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -268,6 +268,12 @@ object IArray {
// A convenience to avoid having to cast everything by hand
private given [A] as Conversion[Array[A], IArray[A]] = identity[Sub[A]]

/** Convert an array into an immutable array without copying, the original array
* must _not_ be mutated after this or the guaranteed immutablity of IArray will
* be violated.
*/
def unsafeFromArray[T](s: Array[T]): IArray[T] = s

/** An immutable array of length 0. */
def empty[T: ClassTag]: IArray[T] = new Array[T](0)

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