Revert of [es6] Better support for built-ins subclassing.

test/mjsunit/es6/classes-subclass-builtins.js

-// Copyright 2015 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Flags: --allow-natives-syntax
-
-"use strict";
-
-
-function checkPrototypeChain(object, constructors) {
-  var proto = object.__proto__;
-  for (var i = 0; i < constructors.length; i++) {
-    assertEquals(constructors[i].prototype, proto);
-    assertEquals(constructors[i], proto.constructor);
-    proto = proto.__proto__;
-  }
-}
-
-
-(function() {
-  class A extends Boolean {
-    constructor(...args) {
-      assertTrue(%IsConstructCall());
-      super(...args);
-      this.a = 42;
-    }
-  }
-
-  var o = new A(true);
-  assertTrue(o instanceof Object);
-  assertTrue(o instanceof Boolean);
-  assertTrue(o instanceof A);
-  assertEquals("object", typeof o);
-  checkPrototypeChain(o, [A, Boolean]);
-  assertTrue(o.valueOf());
-  assertEquals(42, o.a);
-
-  var o1 = new A(false);
-  assertTrue(%HaveSameMap(o, o1));
-})();
-
-
-function TestErrorSubclassing(error) {
-  class A extends error {
-    constructor(...args) {
-      assertTrue(%IsConstructCall());
-      super(...args);
-      this.a = 42;
-    }
-  }
-
-  var o = new A("message");
-  assertTrue(o instanceof Object);
-  assertTrue(o instanceof error);
-  assertTrue(o instanceof Error);
-  assertTrue(o instanceof A);
-  assertEquals("object", typeof o);
-  if (error == Error) {
-    checkPrototypeChain(o, [A, Error, Object]);
-  } else {
-    checkPrototypeChain(o, [A, error, Error, Object]);
-  }
-  assertEquals("message", o.message);
-  assertEquals(error.name + ": message", o.toString());
-  assertEquals(42, o.a);
-
-  var o1 = new A("achtung!");
-  assertTrue(%HaveSameMap(o, o1));
-}
-
-
-(function() {
-  TestErrorSubclassing(Error);
-  TestErrorSubclassing(EvalError);
-  TestErrorSubclassing(RangeError);
-  TestErrorSubclassing(ReferenceError);
-  TestErrorSubclassing(SyntaxError);
-  TestErrorSubclassing(TypeError);
-  TestErrorSubclassing(URIError);
-})();
-
-
-(function() {
-  class A extends Number {
-    constructor(...args) {
-      assertTrue(%IsConstructCall());
-      super(...args);
-      this.a = 42;
-    }
-  }
-
-  var o = new A(153);
-  assertTrue(o instanceof Object);
-  assertTrue(o instanceof Number);
-  assertTrue(o instanceof A);
-  assertEquals("object", typeof o);
-  checkPrototypeChain(o, [A, Number, Object]);
-  assertEquals(153, o.valueOf());
-  assertEquals(42, o.a);
-
-  var o1 = new A(312);
-  assertTrue(%HaveSameMap(o, o1));
-})();
-
-
-(function() {
-  class A extends Date {
-    constructor(...args) {
-      assertTrue(%IsConstructCall());
-      super(...args);
-      this.a = 42;
-    }
-  }
-
-  var o = new A(1234567890);
-  assertTrue(o instanceof Object);
-  assertTrue(o instanceof Date);
-  assertTrue(o instanceof A);
-  assertEquals("object", typeof o);
-  checkPrototypeChain(o, [A, Date, Object]);
-  assertEquals(1234567890, o.getTime());
-  assertEquals(42, o.a);
-
-  var o1 = new A(2015, 10, 29);
-  assertEquals(2015, o1.getFullYear());
-  assertEquals(10, o1.getMonth());
-  assertEquals(29, o1.getDate());
-  assertTrue(%HaveSameMap(o, o1));
-})();
-
-
-(function() {
-  class A extends String {
-    constructor(...args) {
-      assertTrue(%IsConstructCall());
-      super(...args);
-      this.a = 42;
-    }
-  }
-
-  var o = new A("foo");
-  assertTrue(o instanceof Object);
-  assertTrue(o instanceof String);
-  assertTrue(o instanceof A);
-  assertEquals("object", typeof o);
-  checkPrototypeChain(o, [A, String, Object]);
-
-  assertEquals("foo", o.valueOf());
-  assertEquals(42, o.a);
-
-  var o1 = new A("bar");
-  assertTrue(%HaveSameMap(o, o1));
-})();
-
-
-(function() {
-  class A extends RegExp {
-    constructor(...args) {
-      assertTrue(%IsConstructCall());
-      super(...args);
-      this.a = 42;
-    }
-  }
-
-  var o = new A("o..h");
-  assertTrue(o instanceof Object);
-  assertTrue(o instanceof RegExp);
-  assertTrue(o instanceof A);
-  assertEquals("object", typeof o);
-  checkPrototypeChain(o, [A, RegExp, Object]);
-  assertTrue(o.test("ouch"));
-  assertEquals(42, o.a);
-
-  var o1 = new A(7);
-  assertTrue(%HaveSameMap(o, o1));
-})();
-
-
-function TestArraySubclassing(array) {
-  class A extends array {
-    constructor(...args) {
-      assertTrue(%IsConstructCall());
-      super(...args);
-      this.a = 42;
-    }
-  }
-
-  var o = new A(10);
-  assertTrue(o instanceof Object);
-  assertTrue(o instanceof array);
-  assertTrue(o instanceof A);
-  assertEquals("object", typeof o);
-  checkPrototypeChain(o, [A, array, Object]);
-  assertEquals(10, o.length);
-  assertEquals(42, o.a);
-
-  var o1 = new A(7);
-  assertTrue(%HaveSameMap(o, o1));
-}
-
-
-(function() {
-  TestArraySubclassing(Array);
-  TestArraySubclassing(Int8Array);
-  TestArraySubclassing(Uint8Array);
-  TestArraySubclassing(Uint8ClampedArray);
-  TestArraySubclassing(Int16Array);
-  TestArraySubclassing(Uint16Array);
-  TestArraySubclassing(Int32Array);
-  TestArraySubclassing(Uint32Array);
-  TestArraySubclassing(Float32Array);
-  TestArraySubclassing(Float64Array);
-})();
-
-
-(function() {
-  class A extends ArrayBuffer {
-    constructor(...args) {
-      assertTrue(%IsConstructCall());
-      super(...args);
-      this.a = 42;
-    }
-  }
-
-  var o = new A(16);
-  assertTrue(o instanceof Object);
-  assertTrue(o instanceof ArrayBuffer);
-  assertTrue(o instanceof A);
-  assertEquals("object", typeof o);
-  checkPrototypeChain(o, [A, ArrayBuffer, Object]);
-
-  assertEquals(16, o.byteLength);
-  assertEquals(42, o.a);
-
-  var o1 = new A("bar");
-  assertTrue(%HaveSameMap(o, o1));
-
-
-  class MyInt32Array extends Int32Array {
-    constructor(v, name) {
-      super(v);
-      this.name = name;
-    }
-  }
-
-  class MyUint32Array extends Uint32Array {
-    constructor(v, name) {
-      super(v);
-      this.name = name;
-    }
-  }
-
-  var int32view = new MyInt32Array(o, "cats");
-  var uint32view = new MyUint32Array(o, "dogs");
-
-  int32view[0] = -2;
-  uint32view[1] = 0xffffffff;
-
-  assertEquals("cats", int32view.name);
-  assertEquals("dogs", uint32view.name);
-  assertEquals(-2, int32view[0]);
-  assertEquals(-1, int32view[1]);
-  assertEquals(0xfffffffe, uint32view[0]);
-  assertEquals(0xffffffff, uint32view[1]);
-})();
-
-
-(function() {
-  class A extends DataView {
-    constructor(...args) {
-      assertTrue(%IsConstructCall());
-      super(...args);
-      this.a = 42;
-    }
-  }
-
-  var buffer = new ArrayBuffer(16);
-  var o = new A(buffer);
-  assertTrue(o instanceof Object);
-  assertTrue(o instanceof DataView);
-  assertTrue(o instanceof A);
-  assertEquals("object", typeof o);
-  checkPrototypeChain(o, [A, DataView, Object]);
-
-  o.setUint32(0, 0xcafebabe, false);
-  assertEquals(0xcafebabe, o.getUint32(0, false));
-  assertEquals(0xbebafeca, o.getUint32(0, true));
-  assertEquals(42, o.a);
-
-  var o1 = new A(buffer);
-  assertTrue(%HaveSameMap(o, o1));
-
-})();
-
-
-(function() {
-  class A extends Boolean {
-    constructor() {
-      assertTrue(%IsConstructCall());
-      super(true);
-      this.a00 = 0
-      this.a01 = 0
-      this.a02 = 0
-      this.a03 = 0
-      this.a04 = 0
-      this.a05 = 0
-      this.a06 = 0
-      this.a07 = 0
-      this.a08 = 0
-      this.a09 = 0
-      this.a10 = 0
-      this.a11 = 0
-      this.a12 = 0
-      this.a13 = 0
-      this.a14 = 0
-      this.a15 = 0
-      this.a16 = 0
-      this.a17 = 0
-      this.a18 = 0
-      this.a19 = 0
-    }
-  }
-
-  class B extends A {
-    constructor() {
-      assertTrue(%IsConstructCall());
-      super();
-      this.b00 = 0
-      this.b01 = 0
-      this.b02 = 0
-      this.b03 = 0
-      this.b04 = 0
-      this.b05 = 0
-      this.b06 = 0
-      this.b07 = 0
-      this.b08 = 0
-      this.b09 = 0
-      this.b10 = 0
-      this.b11 = 0
-      this.b12 = 0
-      this.b13 = 0
-      this.b14 = 0
-      this.b15 = 0
-      this.b16 = 0
-      this.b17 = 0
-      this.b18 = 0
-      this.b19 = 0
-    }
-  }
-
-  class C extends B {
-    constructor() {
-      assertTrue(%IsConstructCall());
-      super();
-      this.c00 = 0
-      this.c01 = 0
-      this.c02 = 0
-      this.c03 = 0
-      this.c04 = 0
-      this.c05 = 0
-      this.c06 = 0
-      this.c07 = 0
-      this.c08 = 0
-      this.c09 = 0
-      this.c10 = 0
-      this.c11 = 0
-      this.c12 = 0
-      this.c13 = 0
-      this.c14 = 0
-      this.c15 = 0
-      this.c16 = 0
-      this.c17 = 0
-      this.c18 = 0
-      this.c19 = 0
-    }
-  }
-
-  var o = new C();
-  assertTrue(o instanceof Object);
-  assertTrue(o instanceof Boolean);
-  assertTrue(o instanceof A);
-  assertTrue(o instanceof B);
-  assertTrue(o instanceof C);
-  assertEquals("object", typeof o);
-  checkPrototypeChain(o, [C, B, A, Boolean, Object]);
-})();
-
-
-(function() {
-  assertThrows("class A extends undefined {}");
-  assertThrows("class B extends NaN {}");
-  assertThrows("class C extends Infinity {}");
-})();
-
-
-(function() {
-  class A extends null {}
-  assertThrows("new A");
-})();
-
-
-(function() {
-  class A extends Symbol {}
-  assertThrows("new A");
-})();