class RuboCop::Cop::Lint::CircularArgumentReference

end
dry_ingredients.combine
def cook(dry_ingredients = self.dry_ingredients)
# good
@example
end
dry_ingredients.reduce(&:+)
def cook(dry_ingredients = dry_ingredients)
# bad
@example
end
pie.feed_to(user)
def bake(pie: self.pie)
# good
@example
end
pie.refrigerate
def bake(pie:)
# good
@example
end
pie.heat_up
def bake(pie: pie)
# bad
@example
This cop mirrors a warning produced by MRI since 2.2.
arguments and optional ordinal arguments.
This cop checks for circular argument references in optional keyword

def check_for_circular_argument_references(arg_name, arg_value) 

def check_for_circular_argument_references(arg_name, arg_value)
  case arg_value.type
  when :send
    # Ruby 2.0 will have type send every time, and "send nil" if it is
    # calling itself with a specified "self" receiver
    receiver, name = *arg_value
    return unless name == arg_name && receiver.nil?
  when :lvar
    # Ruby 2.2.2 will have type lvar if it is calling its own method
    # without a specified "self"
    return unless arg_value.to_a == [arg_name]
  else
    return
  end
  add_offense(arg_value, :expression, format(MSG, arg_name))
end

def on_kwoptarg(node) 

def on_kwoptarg(node)
  check_for_circular_argument_references(*node)
end

def on_optarg(node) 

def on_optarg(node)
  check_for_circular_argument_references(*node)
end