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Diffstat (limited to 'src')
| -rw-r--r-- | src/library/scala/collection/immutable/Range.scala | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/library/scala/collection/immutable/Range.scala b/src/library/scala/collection/immutable/Range.scala index 47ce2f0341..3736096f36 100644 --- a/src/library/scala/collection/immutable/Range.scala +++ b/src/library/scala/collection/immutable/Range.scala @@ -211,6 +211,13 @@ extends collection.AbstractSeq[Int] final def contains(x: Int) = isWithinBoundaries(x) && ((x - start) % step == 0) + final override def sum[B >: Int](implicit num: Numeric[B]): Int = { + val len = length + if (len == 0) 0 + else if (len == 1) head + else (len.toLong * (head + last) / 2).toInt + } + override def toIterable = this override def toSeq = this |