Make Pair and Triple data classes

libraries/stdlib/src/kotlin/Tuples.kt

@@ -2,58 +2,17 @@ package kotlin
 
 import java.io.Serializable
 
-private fun Any?.safeHashCode() : Int = if (this == null) 0 else this.hashCode()
-
-// TODO: make it a data class
-public class Pair<out A, out B> (
+public data class Pair<out A, out B>(
         public val first: A,
         public val second: B
 ) : Serializable {
-    public fun component1(): A = first
-    public fun component2(): B = second
-
     override fun toString(): String = "($first, $second)"
-
-    override fun hashCode(): Int {
-        var result = first.safeHashCode()
-        result = 31 * result + second.safeHashCode()
-        return result;
-    }
-
-    override fun equals(o: Any?): Boolean {
-        if (this identityEquals o) return true;
-        if (o == null || this.javaClass != o.javaClass) return false;
-
-        val t = o as Pair<*, *>
-        return first == t.first && second == t.second;
-    }
 }
 
-public class Triple<A, B, C> (
+public data class Triple<out A, out B, out C>(
         public val first: A,
         public val second: B,
         public val third: C
 ) : Serializable {
-    public fun component1(): A = first
-    public fun component2(): B = second
-    public fun component3(): C = third
-
     override fun toString(): String = "($first, $second, $third)"
-
-    override fun hashCode(): Int {
-        var result = first.safeHashCode()
-        result = 31 * result + second.safeHashCode()
-        result = 31 * result + third.safeHashCode()
-        return result;
-    }
-
-    override fun equals(o: Any?): Boolean {
-        if (this identityEquals o) return true;
-        if (o == null || this.javaClass != o.javaClass) return false;
-
-        val t = o as Triple<*, *, *>
-        return first == t.first &&
-               second == t.second &&
-               third == t.third;
-    }
 }