This cops checks for parentheses around the arguments in method definitions. Both instance and class/singleton methods are checked.
# File lib/rubocop/cop/style/method_def_parentheses.rb, line 32 def autocorrect(node) @corrections << lambda do |corrector| if style == :require_parentheses args_expr = args_node(node).loc.expression args_with_space = range_with_surrounding_space(args_expr, :left) just_space = Parser::Source::Range.new(args_expr.source_buffer, args_with_space.begin_pos, args_expr.begin_pos) corrector.replace(just_space, '(') corrector.insert_after(args_expr, ')') elsif style == :require_no_parentheses corrector.replace(node.loc.begin, ' ') corrector.remove(node.loc.end) end end end
# File lib/rubocop/cop/style/method_def_parentheses.rb, line 11 def check(node, _method_name, args, _body) if style == :require_parentheses if arguments?(args) && !parentheses?(args) add_offense(node, args.loc.expression, 'Use def with parentheses when there are ' 'parameters.') do opposite_style_detected end else correct_style_detected end elsif parentheses?(args) add_offense(args, :expression, 'Use def without parentheses.') do opposite_style_detected end else correct_style_detected end end
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