A very confusing message when calling the "delegate" macro incorrectly

[dawkot]

When :to argument is skipped, this happens:

class C(T)
  
  delegate m, self.class
  
  def self.m
    T
  end
  
end

Error in line 3: instantiating 'm()'

in line 6: can't infer the type parameter T for the generic class C(T). Please provide it explicitly

[asterite]

Well, delegate doesn't match the macro so the compiler tries to solve it as a method. To solve a method first the arguments are typed. Then m fails.

I can't see a way of improving this error message.

[willhbr]

Could you just implement a second macro that doesn't take the to: argument, and raises a compile-time error with a clearer error message? (I'm happy to make a PR if this is a OK solution).