//// [subtypingWithObjectMembers.ts] class Base { foo: string; } class Derived extends Base { bar: string; } class Derived2 extends Derived { baz: string; } // N and M have the same name, same accessibility, same optionality, and N is a subtype of M // foo properties are valid, bar properties cause errors in the derived class declarations class A { foo: Base; bar: Base; } class B extends A { foo: Derived; // ok bar: string; // error } class A2 { 1: Base; 2.0: Base; } class B2 extends A2 { 1: Derived; // ok 2: string; // error } class A3 { '1': Base; '2.0': Base; } class B3 extends A3 { '1': Derived; // ok '2.0': string; // error } module TwoLevels { class A { foo: Base; bar: Base; } class B extends A { foo: Derived2; // ok bar: string; // error } class A2 { 1: Base; 2.0: Base; } class B2 extends A2 { 1: Derived2; // ok 2: string; // error } class A3 { '1': Base; '2.0': Base; } class B3 extends A3 { '1': Derived2; // ok '2.0': string; // error } } //// [subtypingWithObjectMembers.js] var __extends = this.__extends || function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; function __() { this.constructor = d; } __.prototype = b.prototype; d.prototype = new __(); }; var Base = (function () { function Base() { } return Base; })(); var Derived = (function (_super) { __extends(Derived, _super); function Derived() { _super.apply(this, arguments); } return Derived; })(Base); var Derived2 = (function (_super) { __extends(Derived2, _super); function Derived2() { _super.apply(this, arguments); } return Derived2; })(Derived); // N and M have the same name, same accessibility, same optionality, and N is a subtype of M // foo properties are valid, bar properties cause errors in the derived class declarations var A = (function () { function A() { } return A; })(); var B = (function (_super) { __extends(B, _super); function B() { _super.apply(this, arguments); } return B; })(A); var A2 = (function () { function A2() { } return A2; })(); var B2 = (function (_super) { __extends(B2, _super); function B2() { _super.apply(this, arguments); } return B2; })(A2); var A3 = (function () { function A3() { } return A3; })(); var B3 = (function (_super) { __extends(B3, _super); function B3() { _super.apply(this, arguments); } return B3; })(A3); var TwoLevels; (function (TwoLevels) { var A = (function () { function A() { } return A; })(); var B = (function (_super) { __extends(B, _super); function B() { _super.apply(this, arguments); } return B; })(A); var A2 = (function () { function A2() { } return A2; })(); var B2 = (function (_super) { __extends(B2, _super); function B2() { _super.apply(this, arguments); } return B2; })(A2); var A3 = (function () { function A3() { } return A3; })(); var B3 = (function (_super) { __extends(B3, _super); function B3() { _super.apply(this, arguments); } return B3; })(A3); })(TwoLevels || (TwoLevels = {}));