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Diffstat (limited to 'src/library/scala/collection/immutable/MapLike.scala')
| -rw-r--r-- | src/library/scala/collection/immutable/MapLike.scala | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/library/scala/collection/immutable/MapLike.scala b/src/library/scala/collection/immutable/MapLike.scala index 94a5b7929a..bd5b9c9faf 100644 --- a/src/library/scala/collection/immutable/MapLike.scala +++ b/src/library/scala/collection/immutable/MapLike.scala @@ -113,6 +113,11 @@ self => override def - (elem: A): immutable.Set[A] = if (this(elem)) immutable.Set[A]() ++ this - elem else this + + // ImmutableDefaultKeySet is only protected, so we won't warn on override. + // Someone could override in a way that makes widening not okay + // (e.g. by overriding +, though the version in this class is fine) + override def toSet[B >: A]: Set[B] = this.asInstanceOf[Set[B]] } /** This function transforms all the values of mappings contained |