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import scala.reflect.runtime.universe._
import scala.reflect.macros.blackbox.Context
object Impls {
def foo_targs[T, U: c.WeakTypeTag](c: Context = null)(x: c.Expr[Int] = null) = {
import c.{prefix => prefix}
import c.universe._
val U = implicitly[c.WeakTypeTag[U]]
c.Expr[Unit](q"""
println("invoking foo_targs...")
println("type of prefix is: " + ${prefix.staticType.toString})
println("type of prefix tree is: " + ${prefix.tree.tpe.toString})
println("U is: " + ${U.tpe.toString})
""")
}
}
class Macros[T] {
def foo_targs[U](x: Int) = macro Impls.foo_targs[T, U]
}
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