macro-problems

Problem 1

I have a trait like this

trait Create[R, C] {

  def create(command: C, id: => Id)(implicit clock: Clock, account: Account): R
}

And two classes:

abstract class AbstractCreate[R, C] extends Create[R, C] {

  override def create(command: C, id: => Id)(implicit clock: Clock, account: Account): R = throw new UnsupportedOperationException()
}

class MacroCreate[R, C] extends AbstractCreate[R, C] {

  import scala.language.experimental.macros

  override def create(command: C, id: => Id)(implicit clock: Clock, account: Account): R = macro MutatorMacroImpl.createImpl[R, C]
}

As you can see in MacroCreate there's a macro implementation of method create. This is generally how I understand macro implementation of trait method should be accomplished since macros can't override abstract methods.

Now this code works:

val creator: MacroCreate[AddressRecord, CreateCompanyAddressCommand] = new MacroCreate[AddressRecord, CreateCompanyAddressCommand]

creator.create(command, 12L) should ===(expectedRecord)

But this:

  val creator: Create[AddressRecord, CreateCompanyAddressCommand] = new MacroCreate[AddressRecord, CreateCompanyAddressCommand]

  creator.create(command, 12L) should ===(expectedRecord)

and this:

  val creator: AbstractCreate[AddressRecord, CreateCompanyAddressCommand] = new MacroCreate[AddressRecord, CreateCompanyAddressCommand]

  creator.create(command, 12L) should ===(expectedRecord)

both throw UnsupportedOperationException.

Can't understand why :(