Macro

import java.io.File
import language.experimental.macros
import scala.reflect.macros.Context

object Macros {
  // get current line in source code
  def L_ : Int = macro lineImpl
  def lineImpl( c: Context ): c.Expr[Int] = {
    import c.universe._
    val line = Literal( Constant( c.enclosingPosition.line ) )
    c.Expr[Int]( line )
  }

  // get current file from source code (relative path)
  def F_ : String = macro fileImpl
  def fileImpl( c: Context ): c.Expr[String] = {
    import c.universe._
    val absolute = c.enclosingPosition.source.file.file.toURI
    val base = new File( "." ).toURI
    val path = Literal( Constant( c.enclosingPosition.source.file.file.getName() ) )
    c.Expr[String]( path )
  }

  // get current class/object (a bit sketchy)
  def C_ : String = macro classImpl
  def classImpl( c: Context ): c.Expr[String] = {
    import c.universe._

    val class_ = Literal( Constant( c.enclosingClass.toString.split(" ")( 1 ) ) )
    c.Expr[String]( class_ )
  }

}