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import scala.language.experimental.macros
import scala.language.dynamics
import scala.reflect.macros.whitebox.Context
class DynMacro extends Dynamic {
def applyDynamic(s: String)(xs: Any*): DynMacro =
macro DynMacro.applyDynamicMacro
}
object DynMacro extends DynMacro {
def applyDynamicMacro(c: Context)(s: c.Expr[String])(xs: c.Expr[Any]*): c.Expr[DynMacro] = {
import c.universe._
val Literal(Constant(n: String)) = s.tree
val args = xs.map(_.tree.toString).mkString("(", ", ", ")")
c.Expr(q"println(${ n + args }); ${c.prefix.tree}")
}
}
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