Drop identityEquals from builtins, compiler and tests.

2016-01-21 19:40:46 +03:00
parent f5f5a2dcc1
commit 4d5ec9be3f
44 changed files with 66 additions and 185 deletions
@@ -1,52 +0,0 @@
-/*
- * Copyright 2010-2015 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.jetbrains.kotlin.codegen.intrinsics
-
-import org.jetbrains.kotlin.codegen.Callable
-import org.jetbrains.kotlin.codegen.CallableMethod
-import org.jetbrains.kotlin.codegen.ExpressionCodegen
-import org.jetbrains.kotlin.codegen.StackValue
-import org.jetbrains.kotlin.lexer.KtTokens
-import org.jetbrains.kotlin.psi.KtBinaryExpression
-import org.jetbrains.kotlin.psi.KtCallExpression
-import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
-import org.jetbrains.kotlin.resolve.jvm.AsmTypes.OBJECT_TYPE
-
-class IdentityEquals : IntrinsicMethod() {
-    override fun toCallable(method: CallableMethod): Callable =
-            object : IntrinsicCallable(method) {
-                override fun invokeMethodWithArguments(
-                        resolvedCall: ResolvedCall<*>,
-                        receiver: StackValue,
-                        codegen: ExpressionCodegen
-                ): StackValue {
-                    val element = resolvedCall.call.callElement
-                    val left: StackValue
-                    val right: StackValue
-                    if (element is KtCallExpression) {
-                        left = StackValue.receiver(resolvedCall, receiver, codegen, this)
-                        right = codegen.gen(resolvedCall.valueArgumentsByIndex!!.single().arguments.single().getArgumentExpression())
-                    }
-                    else {
-                        element as KtBinaryExpression
-                        left = codegen.gen(element.left)
-                        right = codegen.gen(element.right)
-                    }
-                    return StackValue.cmp(KtTokens.EQEQEQ, OBJECT_TYPE, left, right)
-                }
-            }
-}
@@ -51,7 +51,6 @@ public class IntrinsicMethods {

    private static final IntrinsicMethod ARRAY_SIZE = new ArraySize();
    private static final Equals EQUALS = new Equals();
-    private static final IdentityEquals IDENTITY_EQUALS = new IdentityEquals();
    private static final IteratorNext ITERATOR_NEXT = new IteratorNext();
    private static final ArraySet ARRAY_SET = new ArraySet();
    private static final ArrayGet ARRAY_GET = new ArrayGet();
@@ -127,7 +126,6 @@ public class IntrinsicMethods {
        declareIntrinsicFunction(FQ_NAMES.cloneable, "clone", 0, CLONE);

        intrinsicsMap.registerIntrinsic(BUILT_INS_PACKAGE_FQ_NAME, KotlinBuiltIns.FQ_NAMES.any, "toString", 0, TO_STRING);
-        intrinsicsMap.registerIntrinsic(BUILT_INS_PACKAGE_FQ_NAME, KotlinBuiltIns.FQ_NAMES.any, "identityEquals", 1, IDENTITY_EQUALS);
        intrinsicsMap.registerIntrinsic(BUILT_INS_PACKAGE_FQ_NAME, KotlinBuiltIns.FQ_NAMES.string, "plus", 1, STRING_PLUS);
        intrinsicsMap.registerIntrinsic(BUILT_INS_PACKAGE_FQ_NAME, null, "arrayOfNulls", 1, new NewArray());

@@ -1109,7 +1109,6 @@ public class BasicExpressionTypingVisitor extends ExpressionTypingVisitor {
            result = visitEquality(expression, context, operationSign, left, right);
        }
        else if (OperatorConventions.IDENTITY_EQUALS_OPERATIONS.contains(operationType)) {
-            context.trace.record(REFERENCE_TARGET, operationSign, components.builtIns.getIdentityEquals());
            ensureNonemptyIntersectionOfOperandTypes(expression, context);
            // TODO : Check comparison pointlessness
            result = TypeInfoFactoryKt.createTypeInfo(components.builtIns.getBooleanType(), context);
@@ -2,7 +2,6 @@ class Test {
    fun check(a: Any?): String {
        if (this === a) return "Fail 1"
        if (!(this !== a)) return "Fail 2"
-        if (this.identityEquals(a)) return "Fail 3"
        return "OK"
    }
 }
@@ -4,5 +4,5 @@ fun box(): String {
 	val r = object : Runnable {
 		override fun run() {}
 	}
-	return if (foo(r).identityEquals(r)) "OK" else "Fail"
+	return if (foo(r) === r) "OK" else "Fail"
 }
@@ -4,5 +4,5 @@ fun box(): String {
 	val r = object : Runnable {
 		override fun run() {}
 	}
-	return if (foo(r).identityEquals(r)) "OK" else "Fail"
+	return if (foo(r) === r) "OK" else "Fail"
 }
@@ -7,10 +7,10 @@ class Foo {
 fun box() : String {
  val a = Foo()
  val b = Foo()
-  if (!a.identityEquals(a)) return "fail 1"
-  if (!b.identityEquals(b)) return "fail 2"
-  if (b.identityEquals(a)) return "fail 3"
-  if (a.identityEquals(b)) return "fail 4"
+  if (a !== a) return "fail 1"
+  if (b !== b) return "fail 2"
+  if (b === a) return "fail 3"
+  if (a === b) return "fail 4"
  if( a !=b ) return "fail5"
  return "OK"
 }
@@ -6,6 +6,6 @@ fun box(): String {
    val a = A(42)
    val b = a.clone()
    if (b != a) return "Fail equals"
-    if (b.identityEquals(a)) return "Fail identity"
+    if (b === a) return "Fail identity"
    return "OK"
 }
@@ -6,6 +6,6 @@ fun box(): String {
    val a = A(42)
    val b = a.clone()
    if (a != b) return "Fail equals"
-    if (a.identityEquals(b)) return "Fail identity"
+    if (a === b) return "Fail identity"
    return "OK"
 }
@@ -10,7 +10,7 @@ fun box(): String {
    val a = A(42)
    val b = a.clone()
    if (a == b) return "Fail: $a == $b"
-    if (a.identityEquals(b)) return "Fail: $a identityEquals $b"
+    if (a === b) return "Fail: $a === $b"
    if (b.x != 239) return "Fail: b.x = ${b.x}"
    return "OK"
 }
@@ -7,6 +7,6 @@ fun box(): String {
    a.add("prosper")
    val b = a.clone()
    if (a != b) return "Fail equals"
-    if (a.identityEquals(b)) return "Fail identity"
+    if (a === b) return "Fail identity"
    return "OK"
 }
@@ -25,8 +25,8 @@ fun box(): String {

    if (c.s != d.s) return "Fail s: ${d.s}"
    if (c.l != d.l) return "Fail l: ${d.l}"
-    if (c.l.identityEquals(d.l)) return "Fail list identity"
-    if (c.identityEquals(d)) return "Fail identity"
+    if (c.l === d.l) return "Fail list identity"
+    if (c === d) return "Fail identity"

    return "OK"
 }
@@ -6,6 +6,6 @@ fun box(): String {
    val a = A("OK")
    val b = a.externalClone()
    if (a != b) return "Fail equals"
-    if (a.identityEquals(b)) return "Fail identity"
+    if (a === b) return "Fail identity"
    return b.s
 }
@@ -13,23 +13,23 @@ fun box(): String {
  val a = original

  a += 1
-  if (!(a.identityEquals(original))) return "Fail 1: $a !== $original"
+  if (a !== original) return "Fail 1: $a !== $original"
  if (a.x != 1) return "Fail 2: ${a.x} != 1"

  a -= 2
-  if (!(a.identityEquals(original))) return "Fail 3: $a !== $original"
+  if (a !== original) return "Fail 3: $a !== $original"
  if (a.x != -1) return "Fail 4: ${a.x} != -1"

  a *= -10
-  if (!(a.identityEquals(original))) return "Fail 5: $a !== $original"
+  if (a !== original) return "Fail 5: $a !== $original"
  if (a.x != 10) return "Fail 6: ${a.x} != 10"

  a /= 3
-  if (!(a.identityEquals(original))) return "Fail 7: $a !== $original"
+  if (a !== original) return "Fail 7: $a !== $original"
  if (a.x != 3) return "Fail 8: ${a.x} != 3"

  a %= 2
-  if (!(a.identityEquals(original))) return "Fail 9: $a !== $original"
+  if (a !== original) return "Fail 9: $a !== $original"
  if (a.x != 1) return "Fail 10: ${a.x} != 1"

  return "OK"
@@ -9,12 +9,5 @@ fun box(): String {
    val x2 = l[0] === l[0]
    if (!x2) return "Fail 2: $x"

-    val y = l[0].identityEquals(1000)
-    if (y) return "Fail (y): $y"
-    val y1 = l[0].identityEquals(1)
-    if (y1) return "Fail (y1): $y"
-    val y2 = l[0].identityEquals(l[0])
-    if (!y2) return "Fail (y2): $y"
-
    return "OK"
 }
@@ -1,6 +1,6 @@
 fun box() : String {
    val a = "lala"
-    if(!a.identityEquals(a)) return "fail 1"
-    if(a.identityEquals(a)) return "OK"
+    if(a !== a) return "fail 1"
+    if(a === a) return "OK"
    return "fail 2"
 }
@@ -1,7 +1,7 @@
 val f : (Any) -> String = { it.toString() }

 fun box() : String {
-    if(!(f.identityEquals(f))) return "fail 1"
+    if(!(f === f)) return "fail 1"
    if(!(f == f)) return "fail 2"
    if(!(f.equals(f))) return "fail 3"
    return "OK"
@@ -1,5 +1,5 @@
 package test

 inline fun <T> doSmth(a: T) : Boolean {
-    return a.identityEquals(a)
+    return a === a
 }
@@ -4,12 +4,12 @@ fun box(): String {
    val s = arrayOf("live", "long")
    val t: Array<String> = s.clone()
    if (!equals(s, t)) return "Fail string"
-    if (s.identityEquals(t)) return "Fail string identity"
+    if (s === t) return "Fail string identity"

    val ss = arrayOf(s, s)
    val tt: Array<Array<String>> = ss.clone()
    if (!equals(ss, tt)) return "Fail string[]"
-    if (ss.identityEquals(tt)) return "Fail string[] identity"
+    if (ss === tt) return "Fail string[] identity"

    return "OK"
 }
@@ -3,35 +3,35 @@ import java.util.Arrays.equals
 fun box(): String {
    val i = intArrayOf(1, 2)
    if (!equals(i, i.clone())) return "Fail int"
-    if (i.clone().identityEquals(i)) return "Fail int identity"
+    if (i.clone() === i) return "Fail int identity"

    val j = longArrayOf(1L, 2L)
    if (!equals(j, j.clone())) return "Fail long"
-    if (j.clone().identityEquals(j)) return "Fail long identity"
+    if (j.clone() === j) return "Fail long identity"

    val s = shortArrayOf(1.toShort(), 2.toShort())
    if (!equals(s, s.clone())) return "Fail short"
-    if (s.clone().identityEquals(s)) return "Fail short identity"
+    if (s.clone() === s) return "Fail short identity"

    val b = byteArrayOf(1.toByte(), 2.toByte())
    if (!equals(b, b.clone())) return "Fail byte"
-    if (b.clone().identityEquals(b)) return "Fail byte identity"
+    if (b.clone() === b) return "Fail byte identity"

    val c = charArrayOf('a', 'b')
    if (!equals(c, c.clone())) return "Fail char"
-    if (c.clone().identityEquals(c)) return "Fail char identity"
+    if (c.clone() === c) return "Fail char identity"

    val d = doubleArrayOf(1.0, -1.0)
    if (!equals(d, d.clone())) return "Fail double"
-    if (d.clone().identityEquals(d)) return "Fail double identity"
+    if (d.clone() === d) return "Fail double identity"

    val f = floatArrayOf(1f, -1f)
    if (!equals(f, f.clone())) return "Fail float"
-    if (f.clone().identityEquals(f)) return "Fail float identity"
+    if (f.clone() === f) return "Fail float identity"

    val z = booleanArrayOf(true, false)
    if (!equals(z, z.clone())) return "Fail boolean"
-    if (z.clone().identityEquals(z)) return "Fail boolean identity"
+    if (z.clone() === z) return "Fail boolean identity"

    return "OK"
 }
@@ -23,7 +23,7 @@ fun box() : String {

    val y: Int? = 1000
    val z: Int? = 1000
-    val res = y.identityEquals(z)
+    val res = y === z

    val c1: Any = if (1 == 1) 0 else "abc"
    val c2: Any = if (1 != 1) 0 else "abc"
@@ -8,7 +8,7 @@ fun box(): String {
        }
    }
    catch (caught: Throwable) {
-        if (!(caught.identityEquals(e))) return "Fail: $caught"
+        if (caught !== e) return "Fail: $caught"
    }

    return "OK"
@@ -8,7 +8,7 @@ fun box(): String {
        }
    }
    catch (caught: Throwable) {
-        if (!(caught.identityEquals(e))) return "Fail: $caught"
+        if (caught !== e) return "Fail: $caught"
        // If monitorexit didn't happen (a finally block failed), this assertion would fail
        assertThatThreadDoesNotOwnMonitor(obj)
    }
@@ -18,7 +18,7 @@ fun foo() {

    val y: Int? = 7
    val z: Int? = 8
-    val res = y.identityEquals(z)
+    val res = y === z

    val c1: Any = if (1 == 1) 0 else "abc"
    val c2: Any = if (1 != 1) 0 else "abc"
@@ -1,6 +1,9 @@
 // No supertype at all
+
+fun Any.extension(<!UNUSED_PARAMETER!>arg<!>: Any?) {}
+
 class A1 {
    fun test() {
-        <!SUPER_CANT_BE_EXTENSION_RECEIVER!>super<!>.<!DEPRECATION!>identityEquals<!>(null) // Call to an extension function
+        <!SUPER_CANT_BE_EXTENSION_RECEIVER!>super<!>.extension(null) // Call to an extension function
    }
 }
@@ -1,5 +1,7 @@
 package

+public fun kotlin.Any.extension(/*0*/ arg: kotlin.Any?): kotlin.Unit
+
 public final class A1 {
    public constructor A1()
    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
@@ -16,13 +16,6 @@

 package kotlin

-/**
- * Returns true if the receiver and the [other] object are the same object instance, or if they
- * are both null.
- */
-@Deprecated("This function is deprecated, use === instead", ReplaceWith("this === other"))
-public fun Any?.identityEquals(other: Any?): Boolean // = this === other
-
 /**
 * Returns a string representation of the object. Can be called with a null receiver, in which case
 * it returns the string "null".
@@ -1176,15 +1176,5 @@ public abstract class KotlinBuiltIns {
        return getNullableAnyType();
    }

-    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

-    // GET FUNCTION
-
-    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-
-    @NotNull
-    public FunctionDescriptor getIdentityEquals() {
-        return first(getBuiltInsPackageFragment().getMemberScope().getContributedFunctions(Name.identifier("identityEquals"),
-                                                                                           NoLookupLocation.FROM_BUILTINS));
-    }
 }
@@ -23,7 +23,6 @@ object OperatorNameConventions {
    @JvmField val SET_VALUE = Name.identifier("setValue")

    @JvmField val EQUALS = Name.identifier("equals")
-    @JvmField val IDENTITY_EQUALS = Name.identifier("identityEquals")
    @JvmField val COMPARE_TO = Name.identifier("compareTo")
    @JvmField val CONTAINS = Name.identifier("contains")
    @JvmField val INVOKE = Name.identifier("invoke")
@@ -32,7 +32,6 @@ val ALL_SEARCHABLE_OPERATIONS: ImmutableSet<KtToken> = ImmutableSet
        .addAll(ASSIGNMENT_OPERATIONS.keys)
        .addAll(COMPARISON_OPERATIONS)
        .addAll(EQUALS_OPERATIONS)
-        .addAll(IDENTITY_EQUALS_OPERATIONS)
        .addAll(IN_OPERATIONS)
        .add(KtTokens.LBRACKET)
        .add(KtTokens.BY_KEYWORD)
@@ -50,7 +49,6 @@ fun Name.getOperationSymbolsToSearch(): Set<KtToken> {
    when (this) {
        OperatorNameConventions.COMPARE_TO -> return COMPARISON_OPERATIONS_TO_SEARCH
        OperatorNameConventions.EQUALS -> return EQUALS_OPERATIONS
-        OperatorNameConventions.IDENTITY_EQUALS -> return IDENTITY_EQUALS_OPERATIONS
        OperatorNameConventions.CONTAINS -> return IN_OPERATIONS_TO_SEARCH
        OperatorNameConventions.ITERATOR -> return IN_OPERATIONS_TO_SEARCH
        in INDEXING_OPERATION_NAMES -> return setOf(KtTokens.LBRACKET)
@@ -32,7 +32,7 @@ class SwapBinaryExpressionIntention : SelfTargetingIntention<KtBinaryExpression>
        private val SUPPORTED_OPERATIONS = setOf(PLUS, MUL, OROR, ANDAND, EQEQ, EXCLEQ, EQEQEQ, EXCLEQEQEQ, GT, LT, GTEQ, LTEQ)

        private val SUPPORTED_OPERATION_NAMES = SUPPORTED_OPERATIONS.mapNotNull { OperatorConventions.BINARY_OPERATION_NAMES[it]?.asString() }.toSet() +
-                                        setOf("xor", "or", "and", "equals", "identityEquals")
+                                        setOf("xor", "or", "and", "equals")
    }

    override fun isApplicableTo(element: KtBinaryExpression, caretOffset: Int): Boolean {
@@ -1,16 +0,0 @@
-// PSI_ELEMENT: org.jetbrains.kotlin.psi.KtNamedFunction
-// OPTIONS: usages
-// FIND_BY_REF
-
-class A(val n: Int) {
-    override fun equals(other: Any?): Boolean = other is A && other.n == n
-}
-
-fun test() {
-    A(0) == A(1)
-    A(0) != A(1)
-    A(0) equals A(1)
-    A(0) <caret>identityEquals A(1)
-    A(0) === A(1)
-    A(0) !== A(1)
-}
@@ -1,3 +0,0 @@
-Function call (13: 10) A(0) identityEquals A(1)
-Function call (14: 10) A(0) === A(1)
-Function call (15: 10) A(0) !== A(1)
@@ -16,8 +16,6 @@ fun foo() {
    oldFun1(oldFun2(10))

    oldFun2()
-
-    1.identityEquals(2)
 }

 fun unnecessarySafeCall(x: String) {
@@ -15,8 +15,6 @@ fun foo() {
    bar(bar(10 + 2) + 1)

    oldFun2()
-
-    1 === 2
 }

 fun unnecessarySafeCall(x: String) {
@@ -126,12 +126,6 @@ public class FindUsagesTestGenerated extends AbstractFindUsagesTest {
                doTest(fileName);
            }

-            @TestMetadata("identityEquals.0.kt")
-            public void testIdentityEquals() throws Exception {
-                String fileName = KotlinTestUtils.navigationMetadata("idea/testData/findUsages/kotlin/conventions/identityEquals.0.kt");
-                doTest(fileName);
-            }
-
            @TestMetadata("inc.0.kt")
            public void testInc() throws Exception {
                String fileName = KotlinTestUtils.navigationMetadata("idea/testData/findUsages/kotlin/conventions/inc.0.kt");
@@ -52,17 +52,6 @@ public final class TopLevelFIF extends CompositeFIF {
    public static final DescriptorPredicate EQUALS_IN_ANY = pattern("kotlin", "Any", "equals");
    @NotNull
    public static final KotlinFunctionIntrinsic KOTLIN_EQUALS = new KotlinFunctionIntrinsic("equals");
-    @NotNull
-    public static final FunctionIntrinsic IDENTITY_EQUALS = new FunctionIntrinsic() {
-        @NotNull
-        @Override
-        public JsExpression apply(
-                @Nullable JsExpression receiver, @NotNull List<JsExpression> arguments, @NotNull TranslationContext context
-        ) {
-            assert arguments.size() == 1 : "Unexpected argument size for kotlin.identityEquals: " + arguments.size();
-            return new JsBinaryOperation(JsBinaryOperator.REF_EQ, receiver, arguments.get(0));
-        }
-    };

    @NotNull
    public static final DescriptorPredicate HASH_CODE_IN_ANY = pattern("kotlin", "Any", "hashCode");
@@ -141,7 +130,6 @@ public final class TopLevelFIF extends CompositeFIF {
        add(EQUALS_IN_ANY, KOTLIN_EQUALS);
        add(pattern("kotlin", "toString").isExtensionOf(FQ_NAMES.any.asString()), TO_STRING);
        add(pattern("kotlin", "equals").isExtensionOf(FQ_NAMES.any.asString()), KOTLIN_EQUALS);
-        add(pattern("kotlin", "identityEquals").isExtensionOf("kotlin.Any"), IDENTITY_EQUALS);
        add(HASH_CODE_IN_ANY, KOTLIN_HASH_CODE);
        add(pattern(NamePredicate.PRIMITIVE_NUMBERS, "equals"), KOTLIN_EQUALS);
        add(pattern("String|Boolean|Char|Number.equals"), KOTLIN_EQUALS);
@@ -24,7 +24,7 @@ fun box(): String {
    val ok2 = Simple.valueOf("OK")
    if (!ok2.equals(ok)) return "ok2 not equal ok"
    if (ok2.hashCode() != ok.hashCode()) return "hash(ok2) not equal hash(ok)"
-    if (!ok2.identityEquals(ok)) return "ok2 not identity equal ok"
+    if (ok2 !== ok) return "ok2 not identity equal ok"


    if (EmptyEnum.values().size != 0) return "EmptyEnum.values().size != 0"
@@ -5,13 +5,13 @@ public fun hashCode(): Int = 0
 public fun toString(): String = ""

 public class PublicClass {
-    override fun equals(a: Any?): Boolean = this.identityEquals(a)
+    override fun equals(a: Any?): Boolean = this === a
    override fun hashCode(): Int = 0
    override fun toString(): String = "PublicClass"
 }

 internal class InternalClass {
-    override fun equals(a: Any?): Boolean = this.identityEquals(a)
+    override fun equals(a: Any?): Boolean = this === a
    override fun hashCode(): Int = 1
    override fun toString(): String = "InternalClass"

@@ -22,7 +22,7 @@ internal class InternalClass {
 }

 private class PrivateClass {
-    override fun equals(a: Any?): Boolean = this.identityEquals(a)
+    override fun equals(a: Any?): Boolean = this === a
    override fun hashCode(): Int = 2
    override fun toString(): String = "InternalClass"

@@ -5,17 +5,17 @@ class X
 fun box(): String {
    val a = X()
    val b = X()
-    if (!a.identityEquals(a)) return "a !== a"
-    if (a.identityEquals(b)) return "X() === X()"
+    if (a !== a) return "a !== a"
+    if (a === b) return "X() === X()"
    val c = a
-    if (!c.identityEquals(a)) return "c = a; c !== a"
+    if (c !== a) return "c = a; c !== a"

-    if (X().identityEquals(a)) return "X() identityEquals a"
+    if (X() === a) return "X() === a"

-    val t = !(X().identityEquals(a))
-    if (!t) return "t = !(X() identityEquals a); t == false"
+    val t = !(X() === a)
+    if (!t) return "t = !(X() === a); t == false"

-    val f = !!(X().identityEquals(a))
-    if (f) return "f = !!(X() identityEquals null); f == true"
+    val f = !!(X() === a)
+    if (f) return "f = !!(X() === null); f == true"
    return "OK";
 }
@@ -1,13 +1,13 @@
 package foo

 fun box(): String {
-    if (!null.identityEquals(null)) return "null !== null"
-    if (!("ab".identityEquals("ab"))) return "ab !== ab"
-    if (("ab".identityEquals("a"))) return "ab === a"
+    if (null !== null) return "null !== null"
+    if (!("ab" === "ab")) return "ab !== ab"
+    if ("ab" === "a") return "ab === a"

-    if ("0".identityEquals(0)) return "'0' === 0"
-    if (!(0.identityEquals(0))) return "0 !== 0"
-    if (0.identityEquals(1)) return "0 === 1"
+    if ("0" as Any === 0) return "'0' === 0"
+    if (!(0 === 0)) return "0 !== 0"
+    if (0 === 1) return "0 === 1"


    return "OK";
@@ -17,7 +17,7 @@ fun String.myHashCode(): Int {
 class Foo(val name: String) {
    override fun equals(other: Any?): Boolean {
        if (other is Foo) return name == other.name
-        return this.identityEquals(other)
+        return this === other
    }
    override fun hashCode(): Int = name.myHashCode()
    override fun toString(): String = "Foo($name)"
@@ -3,11 +3,11 @@ package foo
 class A

 inline fun compare1(a: A): Boolean {
-    return a.identityEquals(a)
+    return a === a
 }

 inline fun compare2(a1: A, a2: A): Boolean {
-    return a1.identityEquals(a2)
+    return a1 === a2
 }

 fun box(): String {
@@ -76,8 +76,8 @@ For `in` and `!in` the procedure is the same, but the order of arguments is reve

 | Expression | Translated to |
 |------------|---------------|
-| `a == b` | `a?.equals(b) ?: b.identityEquals(null)` |
-| `a != b` | `!(a?.equals(b) ?: b.identityEquals(null))` |
+| `a == b` | `a?.equals(b) ?: b === null` |
+| `a != b` | `!(a?.equals(b) ?: b === null)` |

 *Note*: `===` and `!==` (identity checks) are not overloadable, so no conventions exist for them