diff options
| -rw-r--r-- | src/library/scala/PartialFunction.scala | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/library/scala/PartialFunction.scala b/src/library/scala/PartialFunction.scala index 238ab2a588..1543673015 100644 --- a/src/library/scala/PartialFunction.scala +++ b/src/library/scala/PartialFunction.scala @@ -41,6 +41,8 @@ trait PartialFunction[-A, +B] extends AnyRef with (A => B) { def isDefinedAt(x: A): Boolean = PartialFunction.this.isDefinedAt(x) def apply(x: A): C = k(PartialFunction.this.apply(x)) } + + def lift: A => Option[B] = { x => if (isDefinedAt(x)) Some(this(x)) else None } } /** A few handy operations which leverage the extra bit of information |