lib/rubocop/cop/style/def_with_parentheses.rb


# frozen_string_literal: true

module RuboCop
  module Cop
    module Style
      # This cop checks for parentheses in the definition of a method,
      # that does not take any arguments. Both instance and
      # class/singleton methods are checked.
      class DefWithParentheses < Cop
        include OnMethodDef

        MSG = "Omit the parentheses in defs when the method doesn't accept " \
              'any arguments.'.freeze

        def on_method_def(node, _method_name, args, _body)
          return if node.single_line?
          return unless args.children.empty? && args.loc.begin

          add_offense(args, :begin)
        end

        def autocorrect(node)
          lambda do |corrector|
            corrector.remove(node.loc.begin)
            corrector.remove(node.loc.end)
          end
        end
      end
    end
  end
end