Improve type inferrance for bindCallback

[benlesh]

bindCallback has never really had great type safety. Ideally we'd be able to infer the types from the callbacks. Something like this seems like it should work in TS 2.7:

bindCallback(fn: (a: A, b: B, callback: (err: any, c: C, d: D) => void)): (a: A, b: B) => Observable<[C, D]>

[benlesh]

We have a PR for this here #3480... but TypeScript doesn't appear to handle solid type inference, so it's blocked by this issue: microsoft/TypeScript#22952

[benlesh]

#3480 closed this.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.