From bb4935e92c26778a1d1096cd5cd66812a9122f66 Mon Sep 17 00:00:00 2001
From: Paul Phillips <paulp@improving.org>
Date: Wed, 4 Apr 2012 10:01:47 -0700
Subject: Added Option#fold.

---
 test/files/run/option-fold.check |  5 +++++
 test/files/run/option-fold.scala | 19 +++++++++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100644 test/files/run/option-fold.check
 create mode 100644 test/files/run/option-fold.scala

(limited to 'test/files')

diff --git a/test/files/run/option-fold.check b/test/files/run/option-fold.check
new file mode 100644
index 0000000000..4e3fe99f98
--- /dev/null
+++ b/test/files/run/option-fold.check
@@ -0,0 +1,5 @@
+List()
+List(5)
+-1
+0
+1
diff --git a/test/files/run/option-fold.scala b/test/files/run/option-fold.scala
new file mode 100644
index 0000000000..d554ba4f9b
--- /dev/null
+++ b/test/files/run/option-fold.scala
@@ -0,0 +1,19 @@
+object Test {
+  sealed class A
+  case object B extends A
+  case class C(x: Int) extends A
+  
+  def f[T](x: Option[T]) = x.fold(List.empty[T])(List(_))
+  def g(x: Option[A]) = x.fold(-1) {
+    case B    => 0
+    case C(x) => x
+  }
+
+  def main(args: Array[String]): Unit = {
+    println(f(None))
+    println(f(Some(5)))
+    println(g(None))
+    println(g(Some(B)))
+    println(g(Some(C(1))))
+  }
+}
-- 
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