vetExternalProtocol should be a macro

[rkuhn]

• to avoid calling the actual method that creates the Operation
• to generate readable error output in case of a mismatch

[simerplaha]

Hi Roland

Can we use scala.meta for this ?

How would the macro be used, do we use annotation ?

For example -

@VetExternalProtocol(ProcessBased.getMoney)
object GetMoneyProtocol extends E.Protocol {
    ...
}

Cheers :)

[rkuhn]

I imagine the protocol definition to come from an external source, so the macro should not act on that one. Let’s start by just turning the vetExternalProtocol method into a def-macro. Then we can see whether we make it an annotation to be applied to the process definition (i.e. the getMoney method).