class RuboCop::Cop::Style::Attr


attr_reader :one, :two, :three
attr_accessor :something
# good
attr :one, :two, :three # behaves as attr_reader
attr :something, true
# bad - creates a single attribute accessor (deprecated in Ruby 1.9)
@example
This cop checks for uses of Module#attr.

def autocorrect(node) 

def autocorrect(node)
  attr_name, setter = *node.arguments
  node_expr = node.source_range
  attr_expr = attr_name.source_range
  if setter && (setter.true_type? || setter.false_type?)
    remove = range_between(attr_expr.end_pos, node_expr.end_pos)
  end
  lambda do |corrector|
    corrector.replace(node.loc.selector, replacement_method(node))
    corrector.remove(remove) if remove
  end
end

def message(node) 

def message(node)
  format(MSG, replacement: replacement_method(node))
end

def on_send(node) 

def on_send(node)
  return unless node.command?(:attr) && node.arguments?
  add_offense(node, location: :selector)
end

def replacement_method(node) 

def replacement_method(node)
  setter = node.last_argument
  if setter && (setter.true_type? || setter.false_type?)
    setter.true_type? ? 'attr_accessor' : 'attr_reader'
  else
    'attr_reader'
  end
end