File: Impls_1.scala

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import scala.reflect.runtime.universe._
import scala.reflect.macros.blackbox.Context

object Impls {
  def foo[U: c.WeakTypeTag](c: Context) = {
    import c.universe._
    val U = implicitly[c.WeakTypeTag[U]]
    val body = Apply(Select(Ident(definitions.PredefModule), TermName("println")), List(Literal(Constant(U.toString))))
    c.Expr[Unit](body)
  }
}