Scala type keyword: how best to use it across multiple classes

Question

Coming back to Scala after a spell writing Haskell, I\'ve started using the type keyword to make my class definitions a bit more readable, eg:

type RestfulParams         


        

Answer 1

I'm not sure what constitutes niceness in this case, but here are two options:

Using a trait: (Scala's Selfless Trait Pattern)

trait RestfulTypes {
  type Params = Map[String,String]
  //...
}

object MyRestService extends RestService with RestfulTypes { /* ... */ }

Or just import the object's members, effectively using it like a package:

import util.RestfulTypes._