use typeof on return type with T

[bluelovers]

TypeScript Version: 2.7.0-dev.201xxxxx

Search Terms:

Code

can we use typeof on return type with T

// @ts-ignore
export function getStatic<T>(target: T): typeof T
{
	// @ts-ignore
	return target.__proto__.constructor;
}

but at real case i have write

// @ts-ignore
export function getStatic<T>(target): T
{
	// @ts-ignore
	return target.__proto__.constructor;
}

export class A
{
	static b()
	{
		console.log('this is static b');
	}

	b()
	{
		console.log('this is b');
	}
}

export let a = new A();
export const c = getStatic<typeof A>(a);

c.b();
a.b();

Expected behavior:

export declare function getStatic<T>(target: T): typeof T;

Actual behavior:

export declare function getStatic<T>(target: T): T;

Playground Link:

Related Issues:

typeof x expects to get the type of a variable x. You can't get the typeof a type.
You can accomplish what you want like so:

class C {
	readonly "constructor"!: typeof C;
	static m() {}
}

new C().constructor.m();

[bluelovers]

Andy (Andrewkraft) (@Andy-MS) what is !: mean?

It's a definite assignment assertion (#20166)

[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.