scala> def bar1(c: scala.reflect.macros.blackbox.Context) = ???
bar1: (c: scala.reflect.macros.blackbox.Context)Nothing

scala> def foo1 = macro bar1
defined term macro foo1: Nothing

scala> def bar2(c: scala.reflect.macros.whitebox.Context) = ???
bar2: (c: scala.reflect.macros.whitebox.Context)Nothing

scala> def foo2 = macro bar2
defined term macro foo2: Nothing

scala> :quit