class RuboCop::Cop::Style::Attr

This cop checks for uses of Module#attr.

@example

# bad - creates a single attribute accessor (deprecated in Ruby 1.9)
attr :something, true
attr :one, :two, :three # behaves as attr_reader

# good
attr_accessor :something
attr_reader :one, :two, :three

Constants

MSG

Public Instance Methods

autocorrect(node) click to toggle source
# File lib/rubocop/cop/style/attr.rb, line 28
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
on_send(node) click to toggle source
# File lib/rubocop/cop/style/attr.rb, line 22
def on_send(node)
  return unless node.command?(:attr) && node.arguments?

  add_offense(node, location: :selector)
end

Private Instance Methods

message(node) click to toggle source
# File lib/rubocop/cop/style/attr.rb, line 46
def message(node)
  format(MSG, replacement: replacement_method(node))
end
replacement_method(node) click to toggle source
# File lib/rubocop/cop/style/attr.rb, line 50
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