compile time check scala version

compile_time_check_scala_version.scala

Welcome to Scala version 2.10.3 (Java HotSpot(TM) 64-Bit Server VM, Java 1.7.0_45).
Type in expressions to have them evaluated.
Type :help for more information.

scala> import scala.language.experimental.macros
import scala.language.experimental.macros

scala> import scala.reflect.macros.Context
import scala.reflect.macros.Context

scala> def require2_10_4_impl(c: Context): c.Expr[Unit] = {
     |   import c.universe._
     |   if(scala.util.Properties.versionNumberString != "2.10.4"){
     |     c.abort(c.enclosingPosition, "ヽ(`Д´)ﾉ SI-6240")
     |   }
     |   c.Expr(Literal(Constant(())))
     | }
require2_10_4_impl: (c: scala.reflect.macros.Context)c.Expr[Unit]

scala> def require2_10_4: Unit = macro require2_10_4_impl
require2_10_4: Unit

scala> require2_10_4
<console>:12: error: ヽ(`Д´)ﾉ SI-6240
              require2_10_4
              ^