Interpreted absence of any objections in mailin...

Interpreted absence of any objections in mailing list thread
http://www.scala-lang.org/node/7398 as implicit encouragement to
proceed. Adds complementary implicits to Predef such that the eight
primitive types are both boxed and unboxed as the occasion demands.
Review by odersky.

1 files changed, 10 insertions, 1 deletions

diff --git a/src/library/scala/Predef.scala b/src/library/scala/Predef.scala
index 1e926ea07a..3c44a1f992 100644
--- a/src/library/scala/Predef.scala
+++ b/src/library/scala/Predef.scala
@@ -261,7 +261,7 @@ object Predef extends LowPriorityImplicits {
 
   implicit def float2double(x: Float): Double = x.toDouble
 
-  // "Autoboxing" --------------------------------------------------------------
+  // "Autoboxing" and "Autounboxing" ---------------------------------------------------
 
   implicit def byte2Byte(x: Byte)           = java.lang.Byte.valueOf(x)
   implicit def short2Short(x: Short)        = java.lang.Short.valueOf(x)
@@ -272,6 +272,15 @@ object Predef extends LowPriorityImplicits {
   implicit def double2Double(x: Double)     = java.lang.Double.valueOf(x)
   implicit def boolean2Boolean(x: Boolean)  = java.lang.Boolean.valueOf(x)
 
+  implicit def Byte2byte(x: java.lang.Byte): Byte             = x.byteValue
+  implicit def Short2short(x: java.lang.Short): Short         = x.shortValue
+  implicit def Character2char(x: java.lang.Character): Char   = x.charValue
+  implicit def Integer2int(x: java.lang.Integer): Int         = x.intValue
+  implicit def Long2long(x: java.lang.Long): Long             = x.longValue
+  implicit def Float2float(x: java.lang.Float): Float         = x.floatValue
+  implicit def Double2double(x: java.lang.Double): Double     = x.doubleValue
+  implicit def Boolean2boolean(x: java.lang.Boolean): Boolean = x.booleanValue
+
   // Strings and CharSequences --------------------------------------------------------------
 
   implicit def any2stringadd(x: Any) = new runtime.StringAdd(x)