class Rubocop::Cop::Style::DefWithoutParentheses

class/singleton methods are checked.
method, that takes arguments. Both instance and
This cop checks for missing parentheses in the definition of a

def autocorrect(node) 

def autocorrect(node)
  @corrections << lambda do |corrector|
    corrector.insert_before(node.loc.expression, '(')
    corrector.insert_after(node.loc.expression, ')')
  end
end

def on_def(node) 

def on_def(node)
  _, args = *node
  if args.children.size > 0 && args.loc.begin.nil?
    convention(args, :expression)
  end
end

def on_defs(node) 

def on_defs(node)
  _, _, args = *node
  if args.children.size > 0 && args.loc.begin.nil?
    convention(args, :expression)
  end
end