can't wrap function in function - unknown symbol "this"

[skorfmann]

I tried this:

bring cloud;

let authenticatedMiddleware = (handler: inflight (cloud.ApiRequest): cloud.ApiResponse): inflight (cloud.ApiRequest): cloud.ApiResponse => {
  let middleware = inflight (req: cloud.ApiRequest): cloud.ApiResponse => {
    return handler(req);
  };

  return middleware;
};

see playground

This happened:

Failed to compile.

error: Unknown symbol "this"
  --> wing/main.w:1:1
  |
1 | bring cloud;
  | ^ Unknown symbol "this"

I expected this:

no error

Is there a workaround?

No response

Anything else?

Perhaps related to this, but I'm not sure #4993

Wing Version

0.50.6

Node.js Version

18.7

Platform(s)

MacOS

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[skorfmann]

Looks a bit similar to #3717 but this might be a coincidence

[github-actions]

Hi,

This issue hasn't seen activity in 60 days. Therefore, we are marking this issue as stale for now. It will be closed after 7 days.
Feel free to re-open this issue when there's an update or relevant information to be added.
Thanks!

[Chriscbr]

The example in the original issue compiles and works now.

However, the alternate case where you write the code as a static method (instead of a free-floating function) causes a runtime error:

bring cloud;

class A {
  pub static authenticatedMiddleware(handler: inflight (cloud.ApiRequest): cloud.ApiResponse): inflight (cloud.ApiRequest): cloud.ApiResponse {
    let middleware = inflight (req: cloud.ApiRequest): cloud.ApiResponse => {
      return handler(req);
    };
    
    return middleware;
  }
}

let api = new cloud.Api();
api.get("/hello", A.authenticatedMiddleware(inflight (req) => {
  return { status: 200 };
}));

[yoav-steinberg]

However, the alternate case where you write the code as a static method (instead of a free-floating function) causes a runtime error...

Fixed in #6040, closing.