Introduces "Origins" for all your superhero bac...

Introduces "Origins" for all your superhero backstory needs. It logs
where all the calls are coming from: that's all for the moment. It's
explained in the comments and test case, so I'm sure you don't need it
all repeated here. No review.

2 files changed, 27 insertions, 0 deletions

diff --git a/test/files/run/origins.check b/test/files/run/origins.check
new file mode 100644
index 0000000000..c088ea05c2
--- /dev/null
+++ b/test/files/run/origins.check
@@ -0,0 +1,6 @@
+
+>> Origins goxbox.Socks.boop logged 65 calls from 3 distinguished sources.
+
+     50   Test$$anonfun$f3$1.apply$mcII$sp(origins.scala:16)
+     10   Test$$anonfun$f2$1.apply$mcII$sp(origins.scala:15)
+      5   Test$$anonfun$f1$1.apply$mcII$sp(origins.scala:14)
diff --git a/test/files/run/origins.scala b/test/files/run/origins.scala
new file mode 100644
index 0000000000..4c98e7a66c
--- /dev/null
+++ b/test/files/run/origins.scala
@@ -0,0 +1,21 @@
+import scala.tools.nsc.util.Origins
+
+package goxbox {
+  object Socks {
+    val origins = Origins[Socks.type]("boop")
+
+    def boop(x: Int): Int = origins { 5 }
+  }
+}
+
+object Test {
+  import goxbox.Socks.boop
+
+  def f1() = 1 to 5 map boop
+  def f2() = 1 to 10 map boop
+  def f3() = 1 to 50 map boop
+
+  def main(args: Array[String]): Unit = {
+    f1() ; f2() ; f3()
+  }
+}