On Mon, Oct 19, 2015 at 11:04 AM, Konrad Malawski <
[email protected]> wrote:
>
> My main beef with the scaladsl for FlowGraph.Builder is that it both
> requires the builder to be implicit (as in { implicit builder => }) but
> also requires import FlowGraph.Implicits._, both of which are hard to
> discover if all you do is to work with the code (and not reading docs).
>
> The question is how this could be improved, one solution would be to make
> the implicits available from the builder itself, so when you write
> `builder.` you get `dsl`/`ops` and the scaladoc thereof explains that you
> import it and need to make the builder reference an implicit and then you
> can use this awesome DSL to wire your graph.
>
> Yes, I'd want to remove that implicits import a lot.
>
> We show the ~> syntax in most places, so it's basically "the" DSL and
> really "oh and by the way there's another one".
>
> I'd definitely lobby for and merge such change as part of the cleanups if
> you had a bit of time to try doing it.
>
If one puts `dsl` or `api` or whatnot as a member of Builder, then it get
dot-completion, if then also we annotate Builder with @ImplicitNotFound,
then we can guide the user to using `implicit builder =>` iso `builder =>`.
So:
val s = Sink.fromGraph( FlowGraph.create() { implicit b =>
import b.api._
… ~> …
} )
Another option would be to move the arrow-dsl into the scaladsl package
object to get it by default, then you'd only have to make the builder
implicit (which we can assist with the @ImplicitNotFound). That would
hamper discoverability of the api though, as there'd no longer be a dsl/api
member of Builder.
>
> --
> Cheers,
> Konrad 'ktoso’ Malawski
> Akka <http://akka.io> @ Typesafe <http://typesafe.com>
>
>
--
Cheers,
√
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