Comment by hhandoko

I believe these are referred to Railway-Oriented Programming. I've seen several other examples for Elixir (incl. ones using macros), but by far this is the 'cleanest' syntax :)

Here's a similar construct in Scala:

    (for {
      user   <- currentUser(...)
      group  <- groups.fetchForUser(...)
      friend <- friendships.fetchFriend(...)
      member <- groups.addMember(...)
    } yield {
      render(...)
    }).recover {
      case e: Exception -> ...
    }