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//// [instanceofWithStructurallyIdenticalTypes.ts]
// Repro from #7271
class C1 { item: string }
class C2 { item: string[] }
class C3 { item: string }
function foo1(x: C1 | C2 | C3): string {
if (x instanceof C1) {
return x.item;
}
else if (x instanceof C2) {
return x.item[0];
}
else if (x instanceof C3) {
return x.item;
}
return "error";
}
function isC1(c: C1 | C2 | C3): c is C1 { return c instanceof C1 }
function isC2(c: C1 | C2 | C3): c is C2 { return c instanceof C2 }
function isC3(c: C1 | C2 | C3): c is C3 { return c instanceof C3 }
function foo2(x: C1 | C2 | C3): string {
if (isC1(x)) {
return x.item;
}
else if (isC2(x)) {
return x.item[0];
}
else if (isC3(x)) {
return x.item;
}
return "error";
}
// More tests
class A { a: string }
class A1 extends A { }
class A2 { a: string }
class B extends A { b: string }
function goo(x: A) {
if (x instanceof A) {
x; // A
}
else {
x; // never
}
if (x instanceof A1) {
x; // A1
}
else {
x; // A
}
if (x instanceof A2) {
x; // A2
}
else {
x; // A
}
if (x instanceof B) {
x; // B
}
else {
x; // A
}
}
//// [instanceofWithStructurallyIdenticalTypes.js]
// Repro from #7271
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 (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
var C1 = /** @class */ (function () {
function C1() {
}
return C1;
}());
var C2 = /** @class */ (function () {
function C2() {
}
return C2;
}());
var C3 = /** @class */ (function () {
function C3() {
}
return C3;
}());
function foo1(x) {
if (x instanceof C1) {
return x.item;
}
else if (x instanceof C2) {
return x.item[0];
}
else if (x instanceof C3) {
return x.item;
}
return "error";
}
function isC1(c) { return c instanceof C1; }
function isC2(c) { return c instanceof C2; }
function isC3(c) { return c instanceof C3; }
function foo2(x) {
if (isC1(x)) {
return x.item;
}
else if (isC2(x)) {
return x.item[0];
}
else if (isC3(x)) {
return x.item;
}
return "error";
}
// More tests
var A = /** @class */ (function () {
function A() {
}
return A;
}());
var A1 = /** @class */ (function (_super) {
__extends(A1, _super);
function A1() {
return _super !== null && _super.apply(this, arguments) || this;
}
return A1;
}(A));
var A2 = /** @class */ (function () {
function A2() {
}
return A2;
}());
var B = /** @class */ (function (_super) {
__extends(B, _super);
function B() {
return _super !== null && _super.apply(this, arguments) || this;
}
return B;
}(A));
function goo(x) {
if (x instanceof A) {
x; // A
}
else {
x; // never
}
if (x instanceof A1) {
x; // A1
}
else {
x; // A
}
if (x instanceof A2) {
x; // A2
}
else {
x; // A
}
if (x instanceof B) {
x; // B
}
else {
x; // A
}
}
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