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import scala.reflect.runtime.universe._
import scala.reflect.macros.{Context => Ctx}
object Impls {
def foo_targs[T, U: c.TypeTag](c: Ctx = null)(x: c.Expr[Int] = null) = {
import c.{prefix => prefix}
import c.universe._
val U = implicitly[c.TypeTag[U]]
val body = Block(
Apply(Select(Ident(definitions.PredefModule), newTermName("println")), List(Literal(Constant("invoking foo_targs...")))),
Apply(Select(Ident(definitions.PredefModule), newTermName("println")), List(Literal(Constant("type of prefix is: " + prefix.staticTpe)))),
Apply(Select(Ident(definitions.PredefModule), newTermName("println")), List(Literal(Constant("type of prefix tree is: " + prefix.tree.tpe)))),
Apply(Select(Ident(definitions.PredefModule), newTermName("println")), List(Literal(Constant("U is: " + U.tpe)))),
Literal(Constant(())))
c.Expr[Unit](body)
}
}
class Macros[T] {
def foo_targs[U](x: Int) = macro Impls.foo_targs[T, U]
}
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