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Diffstat (limited to 'src/library/scala/collection/Map.scala')
| -rw-r--r-- | src/library/scala/collection/Map.scala | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/library/scala/collection/Map.scala b/src/library/scala/collection/Map.scala index 71b2e7fb1e..a72bb13b5d 100644 --- a/src/library/scala/collection/Map.scala +++ b/src/library/scala/collection/Map.scala @@ -48,10 +48,13 @@ object Map extends MapFactory[Map] { /** An abstract shell used by { mutable, immutable }.Map but not by collection.Map * because of variance issues. */ - abstract class WithDefault[A, +B](underlying: Map[A, B], d: A => B) extends Map[A, B] { + abstract class WithDefault[A, +B](underlying: Map[A, B], d: A => B) extends AbstractMap[A, B] with Map[A, B] { override def size = underlying.size def get(key: A) = underlying.get(key) // removed in 2.9: orElse Some(default(key)) def iterator = underlying.iterator override def default(key: A): B = d(key) } } + +/** Explicit instantiation of the `Map` trait to reduce class file size in subclasses. */ +private[scala] abstract class AbstractMap[A, +B] extends AbstractIterable[(A, B)] with Map[A, B] |