Define instance method with "macro inherited" in Crystal 0.21.1 -

as understand type declaration works kind_of…

“so types aren't strictly type named rather act is_a? or kind_of?.” https://github.com/crystal-lang/crystal/issues/4232

so think part of code works.

but when use macro define instance method on inherited class error message complains method missing wrong object.

class base   macro inherited     def name       "joe smith"     end   end end  class context < base; end  class render   def initialize(@inner_context : base); end    def display     name   end    forward_missing_to inner_context    private property inner_context end  puts render.new(context.new).display 

and output is:

error in line 23: instantiating 'render#display()'  in line 15: instantiating 'name()'  in macro 'forward_missing_to' /usr/lib/crystal/object.cr:1132, line 1:  >  1.     macro method_missing(call)    2.       inner_context.{{call}}    3.     end    4.     expanding macro in macro 'method_missing' expanded macro: forward_missing_to:1, line 1:  >  1.       inner_context.name    2.       undefined method 'name' base (compile-time type base+) 

what missing here?

@inner_context of type base, doesn't define base method.

one solution mark base abstract: abstract class base.