SI-6898 Document AnyVal box and unbox implemention by BoxesRunTime

  - Added @boxRunTimeDoc@ and @unboxRunTimeDoc@ tokens to AnyVals
  - Doc comments refer to BoxesRunTime.java in the Scala repo
  - No comment for Unit

1 files changed, 4 insertions, 0 deletions

diff --git a/src/library/scala/Double.scala b/src/library/scala/Double.scala
index 977ebd19d6..ce081bbec1 100644
--- a/src/library/scala/Double.scala
+++ b/src/library/scala/Double.scala
@@ -382,6 +382,8 @@ object Double extends AnyValCompanion {
 
   /** Transform a value type into a boxed reference type.
    *
+   *  Runtime implementation determined by `scala.runtime.BoxesRunTime.boxToDouble`. See [[https://github.com/scala/scala src/library/scala/runtime/BoxesRunTime.java]].
+   *
    *  @param  x   the Double to be boxed
    *  @return     a java.lang.Double offering `x` as its underlying value.
    */
@@ -391,6 +393,8 @@ object Double extends AnyValCompanion {
    *  method is not typesafe: it accepts any Object, but will throw
    *  an exception if the argument is not a java.lang.Double.
    *
+   *  Runtime implementation determined by `scala.runtime.BoxesRunTime.unboxToDouble`. See [[https://github.com/scala/scala src/library/scala/runtime/BoxesRunTime.java]].
+   *
    *  @param  x   the java.lang.Double to be unboxed.
    *  @throws     ClassCastException  if the argument is not a java.lang.Double
    *  @return     the Double resulting from calling doubleValue() on `x`