93 lines
1.3 KiB
TypeScript
93 lines
1.3 KiB
TypeScript
// @strict: true
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// Repro from #8383
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class A {
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prop!: { a: string; };
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}
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class B {
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prop!: { b: string; }
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}
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function isA(x: any): x is A {
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return x instanceof A;
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}
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function isB(x: any): x is B {
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return x instanceof B;
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}
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function f1(x: A | B) {
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while (true) {
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if (x instanceof A) {
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x.prop.a;
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}
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else if (x instanceof B) {
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x.prop.b;
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}
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}
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}
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function f2(x: A | B) {
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while (true) {
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if (isA(x)) {
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x.prop.a;
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}
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else if (isB(x)) {
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x.prop.b;
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}
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}
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}
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// Repro from #28100
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class Foo1
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{
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x: number; // Error
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constructor() {
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if (this instanceof Boolean) {
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}
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}
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}
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class Foo2
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{
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x: number; // Error
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constructor() {
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}
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}
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// Repro from #29513
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class AInfo {
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a_count: number = 1;
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}
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class BInfo {
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b_count: number = 1;
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}
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class Base {
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id: number = 0;
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}
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class A2 extends Base {
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info!: AInfo;
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}
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class B2 extends Base {
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info!: BInfo;
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}
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let target: Base = null as any;
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while (target) {
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if (target instanceof A2) {
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target.info.a_count = 3;
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}
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else if (target instanceof B2) {
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const j: BInfo = target.info;
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}
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}
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