added CanBuild type alias in package object sca...

added CanBuild type alias in package object scala.collection.generic
added breakout to scala.collection test for breakout

2 files changed, 16 insertions, 0 deletions

diff --git a/src/library/scala/collection/generic/package.scala b/src/library/scala/collection/generic/package.scala
new file mode 100644
index 0000000000..0457fef227
--- /dev/null
+++ b/src/library/scala/collection/generic/package.scala
@@ -0,0 +1,6 @@
+package scala.collection
+import generic.CanBuildFrom
+
+package object generic {
+  type CanBuild[-Elem, +To] = CanBuildFrom[Nothing, Elem, To]
+}
\ No newline at end of file
diff --git a/src/library/scala/collection/package.scala b/src/library/scala/collection/package.scala
new file mode 100644
index 0000000000..d5161a0f1a
--- /dev/null
+++ b/src/library/scala/collection/package.scala
@@ -0,0 +1,10 @@
+package scala
+
+package object collection {
+  import scala.collection.generic.CanBuildFrom // can't refer to CanBuild here
+
+  def breakOut[From, T, To](implicit b : CanBuildFrom[Nothing, T, To]) =
+    new CanBuildFrom[From, T, To] {
+      def apply(from: From) = b.apply() ; def apply() = b.apply()
+    }
+}
\ No newline at end of file