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//// [classExtendingOptionalChain.ts]
namespace A {
export class B {}
}
// ok
class C1 extends A?.B {}
// error
class C2 implements A?.B {}
//// [classExtendingOptionalChain.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;
(function (A) {
var B = /** @class */ (function () {
function B() {
}
return B;
}());
A.B = B;
})(A || (A = {}));
// ok
var C1 = /** @class */ (function (_super) {
__extends(C1, _super);
function C1() {
return _super !== null && _super.apply(this, arguments) || this;
}
return C1;
}((A === null || A === void 0 ? void 0 : A.B)));
// error
var C2 = /** @class */ (function () {
function C2() {
}
return C2;
}());
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