Constructor parameter decorator: "propertyKey" is undefined

[thomas-mindruptive]

TS 2.6.2
Runtime environment: node.js 8.9.0, current Browsers

I'm trying to decorate a constructor parameter with a decorator like this:

export function inject<T>(key?: string | ClassInterface<T> | undefined) {
    ...

    return function (target: Object, propertyKey: string | symbol, paramInx: number): any {
        ...
    }
}

Expected behaviour: "propertyKey" should be defined

Actual: It is undefined

I know that this is similar to #15904. The point there is that this feature depends on the ES property declaration proposal. But I would like to reiterate that:

• At the moment there is no way of attaining the parameter names of ctors.
• This would make various dependcy injection scenarios much easier.
• The transpiler is the only place to get ahold of this design time information. There are no good work-arounds.
• Even if it is not yet defined in the ES6 proposal: Isn't that what TS is about? Bringing new, useful features to the table and eventually - as ES supports them - transpile them to ES?

Thanks a lot

[mhegazy]

This is already covered in #8126 and #15904

[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.