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import scala.reflect.makro.Context
object Macros {
def impl(c: Context) = {
import c.mirror._
val inscope = c.inferImplicitValue(staticClass("SourceLocation").asType)
val outer = Expr[SourceLocation](if (!inscope.isEmpty) inscope else Literal(Constant(null)))
val Apply(fun, args) = c.enclosingImplicits(0)._2
val fileName = fun.pos.fileInfo.getName
val line = fun.pos.line
val charOffset = fun.pos.point
c.reify { SourceLocation1(outer.eval, c.literal(fileName).eval, c.literal(line).eval, c.literal(charOffset).eval) }
}
implicit def sourceLocation: SourceLocation1 = macro impl
}
trait SourceLocation {
/** Source location of the outermost call */
val outer: SourceLocation
/** The name of the source file */
val fileName: String
/** The line number */
val line: Int
/** The character offset */
val charOffset: Int
}
case class SourceLocation1(val outer: SourceLocation, val fileName: String, val line: Int, val charOffset: Int) extends SourceLocation
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