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author | Martijn Hoekstra <martijnhoekstra@gmail.com> | 2016-05-16 18:52:06 +0200 |
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committer | Martijn Hoekstra <martijnhoekstra@gmail.com> | 2016-05-21 09:48:24 +0200 |
commit | c89c36597f922fe29cbb3cec8095611f86ba4976 (patch) | |
tree | eeaef6bee4da5441da999727ff5ba97c4e2aa394 /src | |
parent | b3f8332cf399cd15067c879c8297c25598045883 (diff) | |
download | scala-c89c36597f922fe29cbb3cec8095611f86ba4976.tar.gz scala-c89c36597f922fe29cbb3cec8095611f86ba4976.tar.bz2 scala-c89c36597f922fe29cbb3cec8095611f86ba4976.zip |
SI-9766 - allow ++ on empty ConcatIterator
Diffstat (limited to 'src')
-rw-r--r-- | src/library/scala/collection/Iterator.scala | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/library/scala/collection/Iterator.scala b/src/library/scala/collection/Iterator.scala index 8d88b1c6b1..9ba16976bd 100644 --- a/src/library/scala/collection/Iterator.scala +++ b/src/library/scala/collection/Iterator.scala @@ -200,7 +200,8 @@ object Iterator { } else Iterator.empty.next() override def ++[B >: A](that: => GenTraversableOnce[B]): Iterator[B] = - new ConcatIterator(current, queue :+ (() => that.toIterator)) + if(current eq null) new JoinIterator(Iterator.empty, that) + else new ConcatIterator(current, queue :+ (() => that.toIterator)) } private[scala] final class JoinIterator[+A](lhs: Iterator[A], that: => GenTraversableOnce[A]) extends Iterator[A] { |