Add toString() to Any, fix all tests

#KT-4517 Fixed

compiler/testData/codegen/box/classes/kt285.kt

@@ -1,6 +1,6 @@
 trait Trait {
     fun foo() = "O"
-    fun toString() = "K"
+    override fun toString() = "K"
 }
 
 class SimpleClass : Trait

compiler/testData/codegen/box/classes/kt633.kt

@@ -1,5 +1,5 @@
 class mInt(val i : Int) {
-    fun toString() : String = "mint: $i"
+    override fun toString() : String = "mint: $i"
     fun plus(i : Int) = mInt(this.i + i)
     fun inc() = mInt(i + 1)
 }

compiler/testData/codegen/box/finally/finallyAndFinally.kt

@@ -5,7 +5,7 @@ class MyString {
         return this
     }
 
-    fun toString(): String {
+    override fun toString(): String {
         return s
     }
 }

compiler/testData/codegen/box/finally/kt3894.kt

@@ -5,7 +5,7 @@ class MyString {
         return this
     }
 
-    fun toString(): String {
+    override fun toString(): String {
         return s
     }
 }

compiler/testData/codegen/box/finally/loopAndFinally.kt

@@ -7,7 +7,7 @@ class MyString {
         return this
     }
 
-    fun toString(): String {
+    override fun toString(): String {
         return s
     }
 }

compiler/testData/codegen/box/finally/tryLoopTry.kt

@@ -7,7 +7,7 @@ class MyString {
         return this
     }
 
-    fun toString(): String {
+    override fun toString(): String {
         return s
     }
 }

compiler/testData/codegen/box/localClasses/anonymousObjectInInitializer.kt

@@ -3,7 +3,7 @@ class A {
 
     {
         a = object {
-            fun toString(): String = "OK"
+            override fun toString(): String = "OK"
         }.toString()
     }
 }

compiler/testData/codegen/box/localClasses/anonymousObjectInParameterInitializer.kt

@@ -1,6 +1,6 @@
 class A(
         val a: String = object {
-            fun toString(): String = "OK"
+            override fun toString(): String = "OK"
         }.toString()
 )
 

compiler/testData/codegen/box/properties/kt1417.kt

@@ -3,7 +3,7 @@ package pack
 open class A(val value: String )
 
 class B(value: String) : A(value) {
-    fun toString() = "B($value)";
+    override fun toString() = "B($value)";
 }
 
 fun box() = if (B("4").toString() == "B(4)") "OK" else "fail"

compiler/testData/codegen/box/traits/kt2399.kt

@@ -7,7 +7,7 @@ class JsonArray {
 }
 
 class ProjectInfo {
-    public fun toString(): String = "OK"
+    override fun toString(): String = "OK"
 }
 
 public trait Parser<in IN: Any, out OUT: Any> {

compiler/testData/codegen/box/traits/withRequiredPropertyViaBridge.kt

@@ -4,7 +4,7 @@ trait Trait : Base {
     private val value : String
         get() = "OK"
         
-    fun toString() = object {
+    override fun toString() = object {
         fun foo() = value
     }.foo()
 }

compiler/testData/codegen/boxWithStdlib/dataClasses/tostring/alreadyDeclared.kt

@@ -1,5 +1,5 @@
 data class A(val x: Int) {
-  fun toString(): String = "!"
+  override fun toString(): String = "!"
 }
 
 fun box(): String {

compiler/testData/codegen/boxWithStdlib/dataClasses/tostring/alreadyInherited.kt

@@ -1,5 +1,5 @@
 trait SuperTrait {
-    public fun toString(): String = "!"
+  override fun toString(): String = "!"
 }
 
 data class A(val x: Int): SuperTrait {

compiler/testData/codegen/boxWithStdlib/regressions/kt1800.kt

@@ -6,7 +6,7 @@ import java.util.ArrayList
 public class User(val firstName: String,
                   val lastName: String,
                   val age: Int) {
-    fun toString() = "$firstName $lastName, age $age"
+    override fun toString() = "$firstName $lastName, age $age"
 }
 
 public fun <T: Comparable<T>> Collection<T>.testMin(): T? {

compiler/testData/codegen/regressions/kt1846.kt

@@ -1,4 +1,4 @@
 class A(private var v1: String) {
     private var v2 = v1
-    fun toString(): String { return "A[v1=$v1,v2=$v2]" }
+    override fun toString(): String { return "A[v1=$v1,v2=$v2]" }
 }

compiler/testData/diagnostics/tests/Builders.kt

@@ -52,7 +52,7 @@ fun main(args : Array<String>) {
 trait Element {
   fun render(builder : StringBuilder, indent : String)
 
-  fun toString() : String? {
+  override fun toString() : String {
     val builder = StringBuilder()
     render(builder, "")
     return builder.toString()

compiler/testData/diagnostics/tests/infos/Autocasts.kt

@@ -183,7 +183,7 @@ fun returnFunctionLiteral(a: Any?): Function0<Int> =
 fun mergeAutocasts(a: Any?) {
   if (a is String || a is Int) {
     a.<!UNRESOLVED_REFERENCE!>compareTo<!>("")
-    a.toString()
+    <!DEBUG_INFO_AUTOCAST!>a<!>.toString()
   }
   if (a is Int || a is String) {
     a.<!UNRESOLVED_REFERENCE!>compareTo<!>("")

compiler/testData/psi/recovery/MissingCommaInConstructorValueParameterList.kt

@@ -1,3 +1,3 @@
 class Test(private val a: Int b: Int private val c: Int) {
-    fun toString() = "$a $c"
+    override fun toString() = "$a $c"
 }

compiler/testData/psi/recovery/MissingCommaInConstructorValueParameterList.txt

@@ -53,6 +53,9 @@ JetFile: MissingCommaInConstructorValueParameterList.kt
       PsiElement(LBRACE)('{')
       PsiWhiteSpace('\n    ')
       FUN
+        MODIFIER_LIST
+          PsiElement(override)('override')
+        PsiWhiteSpace(' ')
         PsiElement(fun)('fun')
         PsiWhiteSpace(' ')
         PsiElement(IDENTIFIER)('toString')

compiler/testData/recursiveProcessor/declarations.txt

@@ -52,33 +52,44 @@ Trait:ClassDescriptorWithResolutionScopes
 a:ValueParameterDescriptor
 fake <class-object-for-Class>.equals:SimpleFunctionDescriptor
 fake <class-object-for-Class>.hashCode:SimpleFunctionDescriptor
+fake <class-object-for-Class>.toString:SimpleFunctionDescriptor
 fake <class-object-for-NestedClass>.equals:SimpleFunctionDescriptor
 fake <class-object-for-NestedClass>.hashCode:SimpleFunctionDescriptor
+fake <class-object-for-NestedClass>.toString:SimpleFunctionDescriptor
 fake <class-object-for-NestedObject>.equals:SimpleFunctionDescriptor
 fake <class-object-for-NestedObject>.hashCode:SimpleFunctionDescriptor
 fake <class-object-for-NestedObject>.nestedFunc:SimpleFunctionDescriptor
+fake <class-object-for-NestedObject>.toString:SimpleFunctionDescriptor
 fake <class-object-for-Object>.<get-objProp>:PropertyGetterDescriptor
 fake <class-object-for-Object>.equals:SimpleFunctionDescriptor
 fake <class-object-for-Object>.hashCode:SimpleFunctionDescriptor
 fake <class-object-for-Object>.objFunc:SimpleFunctionDescriptor
 fake <class-object-for-Object>.objProp:PropertyDescriptor
+fake <class-object-for-Object>.toString:SimpleFunctionDescriptor
 fake Class.<get-traitProp>:PropertyGetterDescriptor
 fake Class.equals:SimpleFunctionDescriptor
 fake Class.hashCode:SimpleFunctionDescriptor
+fake Class.toString:SimpleFunctionDescriptor
 fake Class.traitFunc:SimpleFunctionDescriptor
 fake Class.traitProp:PropertyDescriptor
 fake NestedClass.equals:SimpleFunctionDescriptor
 fake NestedClass.hashCode:SimpleFunctionDescriptor
+fake NestedClass.toString:SimpleFunctionDescriptor
 fake NestedObject.equals:SimpleFunctionDescriptor
 fake NestedObject.hashCode:SimpleFunctionDescriptor
+fake NestedObject.toString:SimpleFunctionDescriptor
 fake NestedTrait.equals:SimpleFunctionDescriptor
 fake NestedTrait.hashCode:SimpleFunctionDescriptor
+fake NestedTrait.toString:SimpleFunctionDescriptor
 fake Object.equals:SimpleFunctionDescriptor
 fake Object.hashCode:SimpleFunctionDescriptor
+fake Object.toString:SimpleFunctionDescriptor
 fake Outer.equals:SimpleFunctionDescriptor
 fake Outer.hashCode:SimpleFunctionDescriptor
+fake Outer.toString:SimpleFunctionDescriptor
 fake Trait.equals:SimpleFunctionDescriptor
 fake Trait.hashCode:SimpleFunctionDescriptor
+fake Trait.toString:SimpleFunctionDescriptor
 func.this:ReceiverParameterDescriptor
 innerTest.<get-prop>:PropertyGetterDescriptor
 innerTest.<get-propVar>:PropertyGetterDescriptor