Intrinsic default objects implementation

core/builtins/native/kotlin/Enum.kt

@@ -22,6 +22,8 @@ package kotlin
  * information on enum classes.
  */
 public abstract class Enum<E : Enum<E>>(name: String, ordinal: Int): Comparable<E> {
+    class object {}
+
     /**
      * Returns the name of this enum constant, exactly as declared in its enum declaration.
      */

core/builtins/native/kotlin/Numbers.kt

@@ -61,6 +61,8 @@ public abstract class Number {
  * values of this type are represented as values of the primitive type `double`.
  */
 public class Double private () : Number, Comparable<Double> {
+    class object : FloatingPointConstants<Double> {}
+
     public override fun compareTo(other: Double): Int
     public fun compareTo(other: Float): Int
     public fun compareTo(other: Long) : Int
@@ -135,6 +137,8 @@ public class Double private () : Number, Comparable<Double> {
  * values of this type are represented as values of the primitive type `float`.
  */
 public class Float private () : Number, Comparable<Float> {
+    class object : FloatingPointConstants<Float> {}
+
     public fun compareTo(other: Double): Int
     public override fun compareTo(other: Float): Int
     public fun compareTo(other: Long)  : Int
@@ -210,6 +214,8 @@ public class Float private () : Number, Comparable<Float> {
  * as values of the primitive type `long`.
  */
 public class Long private () : Number, Comparable<Long> {
+    class object {}
+
     public fun compareTo(other: Double): Int
     public fun compareTo(other: Float) : Int
     public override fun compareTo(other: Long): Int
@@ -293,6 +299,8 @@ public class Long private () : Number, Comparable<Long> {
  * as values of the primitive type `int`.
  */
 public class Int private () : Number, Comparable<Int> {
+    class object {}
+
     public fun compareTo(other: Double): Int
     public fun compareTo(other: Float) : Int
     public fun compareTo(other: Long)  : Int
@@ -376,6 +384,8 @@ public class Int private () : Number, Comparable<Int> {
  * as values of the primitive type `short`.
  */
 public class Short private () : Number, Comparable<Short> {
+    class object {}
+
     public fun compareTo(other: Double): Int
     public fun compareTo(other: Float) : Int
     public fun compareTo(other: Long)  : Int
@@ -451,6 +461,8 @@ public class Short private () : Number, Comparable<Short> {
  * as values of the primitive type `byte`.
  */
 public class Byte private () : Number, Comparable<Byte> {
+    class object {}
+
     public fun compareTo(other: Double): Int
     public fun compareTo(other: Float) : Int
     public fun compareTo(other: Long)  : Int

core/builtins/native/kotlin/String.kt

@@ -21,6 +21,8 @@ package kotlin
  * implemented as instances of this class.
  */
 public class String : Comparable<String>, CharSequence {
+    class object {}
+    
     /**
      * Returns a string obtained by concatenating this string with the string representation of the given [other] object.
      */