equals generation for data classes

compiler/testData/codegen/dataClasses/equals/genericarray.kt

@@ -0,0 +1,6 @@
+data class A(val v: Array<Int>)
+
+fun box() : String {
+  if(A(array(0,1,2)) != A(array(0,1,2))) return "fail"
+  return "OK"
+}

compiler/testData/codegen/dataClasses/equals/instanceof.kt

@@ -0,0 +1,13 @@
+class Dummy {
+  fun equals(other: Any?) = true
+}
+
+open data class A(val v: Any)
+
+class B(v: Any) : A(v)
+
+fun box() : String {
+  val a = A(Dummy())
+  val b = B(Dummy())
+  return if(b == a) "OK" else "fail"
+}

compiler/testData/codegen/dataClasses/equals/intarray.kt

@@ -0,0 +1,6 @@
+data class A(val v: IntArray)
+
+fun box() : String {
+  if(A(intArray(0,1,2)) != A(intArray(0,1,2))) return "fail"
+  return "OK"
+}

compiler/testData/codegen/dataClasses/equals/nullother.kt

@@ -0,0 +1,11 @@
+class Dummy {
+  fun equals(other: Any?) = true
+}
+
+data class A(val v: Any?)
+
+fun box() : String {
+  val a = A(Dummy())
+  val b: A? = null
+  return if(a != b && b != a) "OK" else "fail"
+}

compiler/testData/codegen/dataClasses/equals/sameinstance.kt

@@ -0,0 +1,7 @@
+data class A()
+
+fun box() : String {
+  val a = A()
+  val b = a
+  return if(b == a) "OK" else "fail"
+}