How to apply an attribute to a method introduced by another aspect?

I have an aspect that has a dependency on another aspect. However, I'd like for downstream projects to be able to elect to apply either aspect without actually specifying both on the page. When applying the changes via a TypeAspect, how might I have it decorate the type with the attribute for another aspect?

Thank you!

WhitOP•7/26/23, 11:45 AM

Having just noticed this option, are there any examples of how to use builder.Advice.IntroduceAttributebuilder.Advice.IntroduceAttribute?

WhitOP•7/26/23, 11:52 AM

Further, can I augment a type to indicate that it implements an interface (after inserting all the methods for said interface on the type)?

Petr Onderka•7/26/23, 12:25 PM

If you want to apply another aspect to the target declaration, use builder.Outbound.AddAspect()builder.Outbound.AddAspect().
To implement an interface, use builder.Advice.ImplementInterfacebuilder.Advice.ImplementInterface, see https://doc.metalama.net/conceptual/aspects/advising/implementing-interfaces for information on how to use it.

WhitOP•7/26/23, 7:14 PM

It doesn't appear to like it if I apply both a [Template][Template] and [InterfaceMember][InterfaceMember] on a method template ("LAMA0261: Multiple template or advice attributes found on the same declaration"), but if I leave off [InterfaceMember][InterfaceMember] I get ("LAMA0510: The aspect 'XYZ' cannot impliciitly implement interface in the type because the aspect type does not contain a member marked with [InterfaceMember] attribute corresponding to the interface member")

How do I mark an advised method with [InterfaceMember] to indicate it's there for the interface implementation?

Gael Fraiteur•7/27/23, 5:27 PM

The same template cannot be used both as an interface member and as a normal template. You have to split/duplicate the templates in two. Each much have a different name. The final name of the introduced member or the interface member can be set by the NameName property of the Template or IntroduceTemplate attribute, or using the buildMethodbuildMethod delegate in the advice factory method (as is demonstrated in the Clone example in https://doc.metalama.net/conceptual/aspects/advising/implementing-interfaces)