Merge pull request scala/scala#10313 from lrytz/div-to-float

Author: SethTisue

library/src/scala/math/BigInt.scala

@@ -172,6 +172,7 @@ final class BigInt(val bigInteger: BigInteger)
     (shifted.signum != 0) && !(shifted equals BigInt.minusOne)
   }
 
+  @deprecated("isWhole on an integer type is always true", "2.12.15")
   def isWhole() = true
   def underlying = bigInteger
 

library/src/scala/runtime/RichInt.scala

@@ -31,6 +31,7 @@ final class RichInt(val self: Int) extends AnyVal with ScalaNumberProxy[Int] wit
   /** Returns `'''true'''` if this number has no decimal component.
     * Always `'''true'''` for `RichInt`.
     */
+  @deprecated("isWhole on an integer type is always true", "2.12.15")
   def isWhole() = true
 
   override def isValidInt   = true

library/src/scala/runtime/ScalaNumberProxy.scala

@@ -45,6 +45,7 @@ trait ScalaNumberProxy[T] extends Any with ScalaNumericAnyConversions with Typed
   def signum          = num.signum(self)
 }
 trait ScalaWholeNumberProxy[T] extends Any with ScalaNumberProxy[T] {
+  @deprecated("isWhole on an integer type is always true", "2.12.15")
   def isWhole() = true
 }
 trait IntegralProxy[T] extends Any with ScalaWholeNumberProxy[T] with RangedProxy[T] {