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author | Martin Odersky <odersky@gmail.com> | 2009-12-07 16:39:35 +0000 |
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committer | Martin Odersky <odersky@gmail.com> | 2009-12-07 16:39:35 +0000 |
commit | 147ecff4e59eb70c13bab1559cd52f1745735c5d (patch) | |
tree | f47e955a86a4c5344363b36718d1da1039ff552f /src | |
parent | ba33e9ba9975d17dc62ad6f4f65c0d5c5c0f280f (diff) | |
download | scala-147ecff4e59eb70c13bab1559cd52f1745735c5d.tar.gz scala-147ecff4e59eb70c13bab1559cd52f1745735c5d.tar.bz2 scala-147ecff4e59eb70c13bab1559cd52f1745735c5d.zip |
Added lift method to PartialFunction
Diffstat (limited to 'src')
-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 |