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=== tests/cases/compiler/doesNotNarrowUnionOfConstructorsWithInstanceof.ts ===
class A {
>A : A
length: 1
>length : 1
constructor() {
this.length = 1
>this.length = 1 : 1
>this.length : 1
>this : this
>length : 1
>1 : 1
}
}
class B {
>B : B
length: 2
>length : 2
constructor() {
this.length = 2
>this.length = 2 : 2
>this.length : 2
>this : this
>length : 2
>2 : 2
}
}
function getTypedArray(flag: boolean) {
>getTypedArray : (flag: boolean) => A | B
>flag : boolean
return flag ? new A() : new B();
>flag ? new A() : new B() : A | B
>flag : boolean
>new A() : A
>A : typeof A
>new B() : B
>B : typeof B
}
function getTypedArrayConstructor(flag: boolean) {
>getTypedArrayConstructor : (flag: boolean) => typeof A | typeof B
>flag : boolean
return flag ? A : B;
>flag ? A : B : typeof A | typeof B
>flag : boolean
>A : typeof A
>B : typeof B
}
const a = getTypedArray(true); // A | B
>a : A | B
>getTypedArray(true) : A | B
>getTypedArray : (flag: boolean) => A | B
>true : true
const b = getTypedArrayConstructor(false); // A constructor | B constructor
>b : typeof A | typeof B
>getTypedArrayConstructor(false) : typeof A | typeof B
>getTypedArrayConstructor : (flag: boolean) => typeof A | typeof B
>false : false
if (!(a instanceof b)) {
>!(a instanceof b) : boolean
>(a instanceof b) : boolean
>a instanceof b : boolean
>a : A | B
>b : typeof A | typeof B
console.log(a.length); // Used to be property 'length' does not exist on type 'never'.
>console.log(a.length) : void
>console.log : (...data: any[]) => void
>console : Console
>log : (...data: any[]) => void
>a.length : 1 | 2
>a : A | B
>length : 1 | 2
}
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