This project is no longer under development. If you need to write macros today use scala-reflect, the macro system that is included with the Scala compiler, is used by most major libraries and is documented here https://docs.scala-lang.org/overviews/macros/overview.html. Stay tuned for updates on macro support in Dotty, http://www.scala-lang.org/blog/2018/04/19/scala-3.html.