Issue with appoint parameter

[OlegDokuka]

Hi guys, I have gotten issue during compilation and have no idea how to fix it.

The argument type "typeof A" impossible appoint parameter type "{new (): any; new (... args: any []): any;}"

@someannotation
class A {
    constructor(a: string) {

    }
}

here someannotation function

export function someannotation(clazz: Class){

}

here Class definition

 export type Class = {
        new (): any;
        new (...args: any[]): any;
    };

Are there any way to declare new (something here):any that would be available for any kind of constructor include abstract class

[DanielRosenwasser]

This isn't one of our error messages. Are you using WebStorm?

[OlegDokuka]

nope, it is in russian language.

here is the original message :
TS2345 Аргумент типа "typeof A" нельзя назначить параметру типа "{ new (): any; new (...args: any[]): any; }". Typejector D:\WorkSpace\VisualStudio\Project\Typejector\Typejector\app.ts 2

[DanielRosenwasser]

Also, our language service seems to be fine with it.

[DanielRosenwasser]

Just tried it out with 1.6 beta, seeing it. The issue is that your type alias shouldn't have both new (...args: any[]): any; and new (): any; because it requires that A needs both constructor overloads. Try removing new (): any;.

[OlegDokuka]

oh, yep it work fine, but what about abstract class? Ara there any way to use Class for abstract classes

[OlegDokuka]

Here is an example of code

type Class = {
    new (...args: any[]): any;
};

function someannotation(clazz: Class) {

}

@someannotation
abstract class A {
    constructor(a: string) {

    }
}

[DanielRosenwasser]

I believe that for now, the only way to do that is to use Function instead of your Class type which what the decorator type declarations use right now. I've brought the issue here up in #4693.