Crystal lang : method_missing for class object?

Question

Something like this?

class A
    module ClassMethods
        macro method_missing(call)
            {% p call %}
        end
    end
    extend ClassMethods
end
A.a

Result of the code is Error : undefined method 'a' for A:Class. It seems method_missing doesn't work for class object.

The reason for the question is that I implemented a class with a current class method to get an instance for current context. For the simplification, I want some like forward_missing_to to replace MyClass.current.xxx with MyClass.xxx, so method_missing is required according forward_missing_to's implementation.

I also found, delegate works fine for class methods using above way. So actually my pratical problem has been solved, but I'm still interesting with the question : method_missing for class object, is it impossible?