//// [classImplementsClass2.ts]
class A { foo(): number { return 1; } }
class C implements A {} // error

class C2 extends A {
    foo() {
        return 1;
    }
}

var c: C;
var c2: C2;
c = c2;
c2 = c;

//// [classImplementsClass2.js]
var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        if (typeof b !== "function" && b !== null)
            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
var A = /** @class */ (function () {
    function A() {
    }
    A.prototype.foo = function () { return 1; };
    return A;
}());
var C = /** @class */ (function () {
    function C() {
    }
    return C;
}()); // error
var C2 = /** @class */ (function (_super) {
    __extends(C2, _super);
    function C2() {
        return _super !== null && _super.apply(this, arguments) || this;
    }
    C2.prototype.foo = function () {
        return 1;
    };
    return C2;
}(A));
var c;
var c2;
c = c2;
c2 = c;
