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import scala.reflect.macros.Context
object Macros {
def impl[T](c: Context)(implicit T: c.WeakTypeTag[T]) = {
import c.universe._
import Flag._
import definitions._
val fields = T.tpe.declarations.toList.collect{ case x: TermSymbol if x.isVal && x.isCaseAccessor => x }
val Repr = appliedType(TupleClass(fields.length).asType.toType, fields.map(_.typeSignature))
c.Expr(Block(
List(ClassDef(
Modifiers(FINAL),
newTypeName("$anon"),
List(),
Template(
List(AppliedTypeTree(Ident(newTypeName("Generic")), List(TypeTree(T.tpe)))),
emptyValDef,
List(
DefDef(Modifiers(), nme.CONSTRUCTOR, List(), List(List()), TypeTree(), Block(List(Apply(Select(Super(This(tpnme.EMPTY), tpnme.EMPTY), nme.CONSTRUCTOR), List())), Literal(Constant(())))),
TypeDef(Modifiers(), newTypeName("Repr"), List(), TypeTree(Repr)))))),
Apply(Select(New(Ident(newTypeName("$anon"))), nme.CONSTRUCTOR), List())))
}
}
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