In scala language, implicit resolution is often done in compile-time and sometimes throws obfuscating error information, one famous example of such error is when shapeless Generic throws error info...

How can I have the scala compiler automatically generate the case object? // Pizza class class Pizza (val crust_type: String) // companion object object Pizza { val crustType = "crust_type" } ...

Up until recently it was my understanding that two Scala statements below were interchangeable. expr.op(arg1, arg2,...) expr op (arg1, arg2,...) But I've playing around with scala meta, looked a...

I just updated to scala meta 2.0.0-M1 and with the latest scala 2.12.3 and now macros no longer compile. The only change i made was to change the meta version from 1.8.0 to 2.0.0-M1. ERROR: new-st...

I am writing a Scala plugin for an editor I use that would highlight all unused code paths (could be unused defs, vals, classes and implicits), and give the user an option to yank them out of the ....

I would like to write an annotation macro that adds an extends <sometype> to traits where <sometype> can be specified at compile time. How can a compile time parameter be passed to a m...

I want to generate aliases of methods using annotation macros in Scala 2.11+. I am not even sure that is even possible. If yes, how? Example - Given this below, I want the annotation macros to exp...