Unconfuse IntelliJ

[i-am-the-slime]

I guess this is either not possible, not documented or I didn't find it in the documentation. Would love to hear some input on this. Is there a trick at least to suppress this? Compiling works fine.

[stanch]

Yeah, sometimes IDEA is not clever enough. You can suppress this by disabling “type-aware highlighting” — it’s a little [T] sign in the bottom right corner. I actually keep this switched off at all times, as most people dealing with Spray, Shapeless, Scalaz, etc, do. The reason lies in that IDEA uses its own custom presentation compiler (unlike Scala IDE, which just calls scalac) and they are still behind the spec.

Also I have to acknowledge that the for syntax is ugly. For now you can use

Ui.sequence(
  toast(...) <~ ... <~ fry,
  Ui(true)
)

But I’m working on reducing this further: https://github.com/macroid/macroid/issues/23.

[stanch]

Oops, Ui.sequence wouldn’t work here, I guess I meant

(toast(...) <~ ... <~ fry).map(_ ⇒ true)

[i-am-the-slime]

Great, thanks for the quick answer. One other question I have is how do you write the unicode signs like ⇒ without copy and paste?

[stanch]

I have put them on my keyboard :) If you are on Windows like me, you can use this tool from Microsoft. Scalariform, which is available as an sbt plugin, can be set up to replace => with ⇒ and <- with ← (but not -> with →) on each compilation. Finally, IDEA has something called “live templates”, which apparently allowed to type crazy Scalaz operators back in the days when crazy operators were in favor :) I have not tried it (have not tried anything on Mac/Linux either).

[stanch]

P.S. I once had ⇜ as an alias for <~, but quickly realized that even I myself am too lazy to type that (and it’s not rendered very well in most fonts).

[i-am-the-slime]

Okay, I made some live templates such that =>+TAB for example expands to ⇒. You might want to reconsider to change these to something simpler ==> (?) because, sadly not everybody will be completely convinced by a Peep Show reference - unlike me.

[stanch]

⇒ is in fact a Scala keyword! It is absolutely the same as =>. Sorry if that confused you.

Although I’m a Peep Show fan, I can’t seem to get the reference, perhaps I made it unconsciously?

[i-am-the-slime]

Oh I was just talking about this: http://static.bips.channel4.com/bips/orig/videos/2776180868001.jpg from your talk. Thanks for clarifying about the => !

[stanch]

I see; that’s what you get when trying to reduce the code density in the presentation :)