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import scala.reflect.macros.whitebox.Context
object Macros {
def impl(c: Context) = {
import c.universe._
val Apply(fun, args) = c.enclosingImplicits(0).tree
val fileName = fun.pos.source.file.file.getName
val line = fun.pos.line
val charOffset = fun.pos.point
def literal[T](x: T) = c.Expr[T](Literal(Constant(x)))
c.universe.reify { SourceLocation(literal(fileName).splice, literal(line).splice, literal(charOffset).splice) }
}
implicit def sourceLocation: SourceLocation = macro impl
}
case class SourceLocation(
/** The name of the source file */
val fileName: String,
/** The line number */
val line: Int,
/** The character offset */
val charOffset: Int
)
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