Bug Report

🔎 Search Terms

instantiation expression nested class

🕗 Version & Regression Information

• This is the behavior in every version I tried

⏯ Playground Link

Playground link with relevant code

💻 Code

class A<T = number> {
    //static { type _<T extends A = A> = 0 }
    //^ will work when uncomment it?

    value!: T;
    child!: InstanceType<typeof A.B<A<T>>>

    static B = class B<T extends A = A> {
        parent!: T;
    } 
}

var a = new A
a.child.parent.value
//              ^?

🙁 Actual behavior

Shows an error 'child' is referenced directly or indirectly in its own type annotation..

However, when uncommenting // static {...} it will work only in playground.
In VSCode it still shows the error above.

🙂 Expected behavior

a.child.parent.value is number

Workaround

A workaround is remove the default type for class B<T>. The code below works well, also, only in playground. In my VSCode(5.0.0-dev.20230216) it still breaks unfortunately.

class A<T extends number = number> {
    value!: T;
    child!: InstanceType<typeof A.B<A<T>>>

    static B = class B<T extends A> {
        parent!: T;
    }  
}

var a = new A
a.child.parent.value
//                ^? number