Can I replace class variables with class instance variables in Simple Form gem?

Question

For stylistic reasons I would like to avoid using class variables and would like to replace them with class instance variables. So if I have:

module SimpleForm
  mattr_accessor :input_error_class
  @@input_error_class = 'error-field'
  ...
end

and I change it to:

module SimpleForm
  @input_error_class = 'error-field'
  class << self
    attr_accessor :input_error_class
  end
  ...
end

will this break Simple Form?

Answer 1

If there is a class that is a subclass or a superclass of SimpleForm that shared @@input_error_class, then by changing a class variable to a class instance variable, the variable will not be shared by the sub/superclass anymore, and that may break the code. Also, if there is an instance method that uses the class variable, that may break the code. Otherwise, it does not break.