3 files changed, 32 insertions, 0 deletions
diff --git a/src/library/scala/runtime/RichDouble.scala b/src/library/scala/runtime/RichDouble.scala
index 0a9cda40ec..f702b9e3da 100644
--- a/src/library/scala/runtime/RichDouble.scala
+++ b/src/library/scala/runtime/RichDouble.scala
@@ -35,4 +35,16 @@ final class RichDouble(val self: Double) extends FractionalProxy[Double] {
   def isInfinity: Boolean = java.lang.Double.isInfinite(self)
   def isPosInfinity: Boolean = isInfinity && self > 0.0
   def isNegInfinity: Boolean = isInfinity && self < 0.0
+
+  override def isValidByte = self.toByte.toDouble == self
+  override def isValidShort = self.toShort.toDouble == self
+  override def isValidChar = self.toChar.toDouble == self
+  override def isValidInt = self.toInt.toDouble == self
+  // override def isValidLong = { val l = self.toLong; l.toDouble == self && l != Long.MaxValue }
+  // override def isValidFloat = self.toFloat.toDouble == self
+  // override def isValidDouble = !java.lang.Double.isNaN(self)
+  override def isWhole = {
+    val l = self.toLong
+    l.toDouble == self || l == Long.MaxValue && self < Double.PositiveInfinity || l == Long.MinValue && self > Double.NegativeInfinity
+  }
 }
diff --git a/src/library/scala/runtime/RichFloat.scala b/src/library/scala/runtime/RichFloat.scala
index c6478ec0c9..6b72a9dd55 100644
--- a/src/library/scala/runtime/RichFloat.scala
+++ b/src/library/scala/runtime/RichFloat.scala
@@ -36,4 +36,16 @@ final class RichFloat(val self: Float) extends FractionalProxy[Float] {
   def isInfinity: Boolean = java.lang.Float.isInfinite(self)
   def isPosInfinity: Boolean = isInfinity && self > 0.0f
   def isNegInfinity: Boolean = isInfinity && self < 0.0f
+
+  override def isValidByte = self.toByte.toFloat == self
+  override def isValidShort = self.toShort.toFloat == self
+  override def isValidChar = self.toChar.toFloat == self
+  override def isValidInt = { val i = self.toInt; i.toFloat == self && i != Int.MaxValue }
+  // override def isValidLong = { val l = self.toLong; l.toFloat == self && l != Long.MaxValue }
+  // override def isValidFloat = !java.lang.Float.isNaN(self)
+  // override def isValidDouble = !java.lang.Float.isNaN(self)
+  override def isWhole = {
+    val l = self.toLong
+    l.toFloat == self || l == Long.MaxValue && self < Float.PositiveInfinity || l == Long.MinValue && self > Float.NegativeInfinity
+  }
 }
diff --git a/src/library/scala/runtime/RichLong.scala b/src/library/scala/runtime/RichLong.scala
index f93d9459d1..5784934ffd 100644
--- a/src/library/scala/runtime/RichLong.scala
+++ b/src/library/scala/runtime/RichLong.scala
@@ -12,4 +12,12 @@ final class RichLong(val self: Long) extends IntegralProxy[Long] {
   def toBinaryString: String = java.lang.Long.toBinaryString(self)
   def toHexString: String = java.lang.Long.toHexString(self)
   def toOctalString: String = java.lang.Long.toOctalString(self)
+
+  override def isValidByte = self.toByte.toLong == self
+  override def isValidShort = self.toShort.toLong == self
+  override def isValidChar = self.toChar.toLong == self
+  override def isValidInt = self.toInt.toLong == self
+  // override def isValidLong = true
+  // override def isValidFloat = self.toFloat.toLong == self && self != Long.MaxValue
+  // override def isValidDouble = self.toDouble.toLong == self && self != Long.MaxValue
 }