Scala2.11 awesome!

build.sbt

scalaVersion := "2.11.0-M7"

scalacOptions ++= Seq("-Xlint")

Main.scala

import scala.sys._

object Main{
  val a = b + "foo"
  val b = "b"

  def hoge(): Unit = {
    val x = 0
    println("bar $x")
  }
}

output

[warn] Main.scala:9: `$x` looks like an interpolated identifier! Did you forget the interpolator?
[warn]     println("bar $x")
[warn]             ^
[warn] Main.scala:1: Unused import
[warn] import scala.sys._
[warn]                  ^
[warn] Main.scala:8: local val in method hoge is never used
[warn]     val x = 0
[warn]         ^
[warn] Main.scala:4: Reference to uninitialized value b
[warn]   val a = b + "foo"
[warn]           ^
[warn] four warnings found