macros to get current file and line, inspired by ruby's __FILE__ and __LINE__

Macros.scala

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

object Macros {

  def LINE: Int = macro lineImpl

  def lineImpl(c: Context): c.Expr[Int] = {
    import c.universe._

    val line = Literal(Constant(c.enclosingPosition.line))

    c.Expr[Int](line)
  }

  def FILE: 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(base.relativize(absolute).getPath))

    c.Expr[String](path)
  }

}

Test.scala

object Test extends App {
  import Macros._

  println(s"Printing from line $LINE of file $FILE")
  // Printing from line 4 of file core/src/main/scala/Test.scala
}

This is great. But how can you get it as an implicit parameter?

https://github.com/scala/scala/blob/master/test/files/run/macro-sip19-revised/Impls_Macros_1.scala

your link didn't open but luckily macros seems to be compatible with implicit parameters:
DeliteEPFL/summer-of-lms-2014@e00f0d8