The gradle scala plugin adds the compileScala task to the project. But sometimes the scala compiler might report something like the following: $ gradle compileScala :compileJava UP-TO-DATE :comp...

Other answers suggest using "-Xlog-implicits" option for debugging "diverging implicit expansion" errors. However, it also logs a lot of implicits in places unrelated to these errors. Is there some...

I have a very simple goal: to compile a Scala class, and then load it from within another Scala script. The problem is that Scala seems to cache (not sure where) the classes that I create, and does...

I've written a tiny bit of Scala object SquareNumbers extends App { val numbers = List(1,2,3,4,5) val squares = numbers map (i => i * i) println (squares) } And run it through scalac as so...

I have this little scala example: object Test { def add(x: Int, y: Int) = { val z = x - y x match { case 0 => 0 - y case 1 => 1 - y case _ => x - y } x + y } def main(args: Arra...

I'm trying to write a Scala compiler plugin that will allow extremely general code generation: something like the generality of the C preprocessor, but a bit more typesafe (I'm not sure if this is ...

As I've been learning Scala I'm often reminded of g++ compiler errors when reading the cryptic output from scalac. However, today I came across something I doubt would happen even in the g++ univer...

I'm currently making extensive use of the type class pattern in to be performance-relevant portions of my code. I made out at least two potential sources of inefficiency. The implicit parameters ...

I'd like to split my scalac plugin into multiple files. This sounds easy but I haven't managed to pull it off due to path-dependent type issues stemming from the import global._ line. Here's Lex S...

I am using a Scala compilation server. This is probably not related to my IDE IntelliJ IDEA, but I will just inform you that I start the Scala compilation server through a special run configuration...

I've been converting some code from java to scala lately trying to teach myself the language. Suppose we have this scala class: class Person() { var name:String = "joebob" } Now I want to acce...

Why doesn't scalac (the Scala compiler) optimize tail recursion? Code and compiler invocations that demonstrates this: > cat foo.scala class Foo { def ifak(n: Int, acc: Int):Int = { if (n ==...