//// [classImplementsClass4.ts] class A { private x = 1; foo(): number { return 1; } } class C implements A { foo() { return 1; } } class C2 extends A {} var c: C; var c2: C2; c = c2; c2 = c; //// [classImplementsClass4.js] var __extends = (this && 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 A = (function () { function A() { this.x = 1; } A.prototype.foo = function () { return 1; }; return A; })(); var C = (function () { function C() { } C.prototype.foo = function () { return 1; }; return C; })(); var C2 = (function (_super) { __extends(C2, _super); function C2() { _super.apply(this, arguments); } return C2; })(A); var c; var c2; c = c2; c2 = c;