Make ResponseAs[T, S] covariant on T

[darl]

I wrote following combinator:

def fromStatus[T, S](mapping: (Int, ResponseAs[T, S])*): ResponseAs[T, S] = {
  fromMetadata { meta =>
    val statusCode = meta.code.code
    mapping.toMap.getOrElse(statusCode, sys.error(s"No parser for status $statusCode"))
  }
}

And want to use it in following way:

fromStatus(
  200 -> protoBody[MyModel].map(Right(_)),
  404 -> ignore.map(_ => Left(NotFound()))
)

But now i forced to explicitly provide all types explicitly:

fromStatus(
  200 -> protoBody[MyModel].map(Right(_): Either[NotFound, MyModel]),
  404 -> ignore.map(_ => Left(NotFound()): Either[NotFound, MyModel])
)

[adamw]

Why not! Can you maybe try modifying the source (creating a PR :) ) and checking if this causes any problems?

[darl]

Yes. I will try it!

[adamw]

Fixed in 2.0.0-RC11