Type like this not assignable to this type.

[Griffork]

TypeScript Version:
Version 2.8.0-dev.20180302

Search Terms:
type, this

Simplest Code

class Thing<T> {
    doot: this;
    dothing(newthing: Thing<T>) {
        this.doot = newthing;
    }
}

Expected behavior:
No error
Actual behavior:
Error Type 'Thing' is not assignable to type 'this'.

Note
Since there is no 'typeof this' operator that I can use, I need to use this to represent types that have the same type as this.

Playground Link

Slimmed down real world example

Related Issues:
8164

[ghost]

You just need to consistently use this in both places.

doot: this;
dothing(newthing: this) {
    this.doot = newthing;
}

The requirement is to prevent this.doot from referring to a Thing even when we're in a subclass and this should refer to the subclass.

class Thing {
    doot!: this;
    dothing(newthing: this) {
        this.doot = newthing as any; // There's a reason the cast is needed!
    }
}

class SubThing extends Thing {
    constructor(readonly foot: number) {};
}

const s = new SubThing();
s.dothing(new Thing());
console.log(typeof s.doot.foot === "number"); // Expected this to always be true!

[typescript-bot]

Automatically closing this issue for housekeeping purposes. The issue labels indicate that it is unactionable at the moment or has already been addressed.