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//// [typeGuardOfFormInstanceOf.ts]
// A type guard of the form x instanceof C, where C is of a subtype of the global type 'Function'
// and C has a property named 'prototype'
// - when true, narrows the type of x to the type of the 'prototype' property in C provided
// it is a subtype of the type of x, or
// - when false, has no effect on the type of x.
class C1 {
p1: string;
}
class C2 {
p2: number;
}
class D1 extends C1 {
p3: number;
}
class C3 {
p4: number;
}
var str: string;
var num: number;
var strOrNum: string | number;
var ctor1: C1 | C2;
str = ctor1 instanceof C1 && ctor1.p1; // C1
num = ctor1 instanceof C2 && ctor1.p2; // C2
str = ctor1 instanceof D1 && ctor1.p1; // D1
num = ctor1 instanceof D1 && ctor1.p3; // D1
var ctor2: C2 | D1;
num = ctor2 instanceof C2 && ctor2.p2; // C2
num = ctor2 instanceof D1 && ctor2.p3; // D1
str = ctor2 instanceof D1 && ctor2.p1; // D1
var r2: D1 | C2 = ctor2 instanceof C1 && ctor2; // C2 | D1
var ctor3: C1 | C2;
if (ctor3 instanceof C1) {
ctor3.p1; // C1
}
else {
ctor3.p2; // C2
}
var ctor4: C1 | C2 | C3;
if (ctor4 instanceof C1) {
ctor4.p1; // C1
}
else if (ctor4 instanceof C2) {
ctor4.p2; // C2
}
else {
ctor4.p4; // C3
}
var ctor5: C1 | D1 | C2;
if (ctor5 instanceof C1) {
ctor5.p1; // C1
}
else {
ctor5.p2; // C2
}
var ctor6: C1 | C2 | C3;
if (ctor6 instanceof C1 || ctor6 instanceof C2) {
}
else {
ctor6.p4; // C3
}
//// [typeGuardOfFormInstanceOf.js]
// A type guard of the form x instanceof C, where C is of a subtype of the global type 'Function'
// and C has a property named 'prototype'
// - when true, narrows the type of x to the type of the 'prototype' property in C provided
// it is a subtype of the type of x, or
// - when false, has no effect on the type of x.
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 D1 = /** @class */ (function (_super) {
__extends(D1, _super);
function D1() {
return _super !== null && _super.apply(this, arguments) || this;
}
return D1;
}(C1));
var C3 = /** @class */ (function () {
function C3() {
}
return C3;
}());
var str;
var num;
var strOrNum;
var ctor1;
str = ctor1 instanceof C1 && ctor1.p1; // C1
num = ctor1 instanceof C2 && ctor1.p2; // C2
str = ctor1 instanceof D1 && ctor1.p1; // D1
num = ctor1 instanceof D1 && ctor1.p3; // D1
var ctor2;
num = ctor2 instanceof C2 && ctor2.p2; // C2
num = ctor2 instanceof D1 && ctor2.p3; // D1
str = ctor2 instanceof D1 && ctor2.p1; // D1
var r2 = ctor2 instanceof C1 && ctor2; // C2 | D1
var ctor3;
if (ctor3 instanceof C1) {
ctor3.p1; // C1
}
else {
ctor3.p2; // C2
}
var ctor4;
if (ctor4 instanceof C1) {
ctor4.p1; // C1
}
else if (ctor4 instanceof C2) {
ctor4.p2; // C2
}
else {
ctor4.p4; // C3
}
var ctor5;
if (ctor5 instanceof C1) {
ctor5.p1; // C1
}
else {
ctor5.p2; // C2
}
var ctor6;
if (ctor6 instanceof C1 || ctor6 instanceof C2) {
}
else {
ctor6.p4; // C3
}
|
