class RuboCop::Cop::Style::OptionalArguments
Checks for optional arguments to methods that do not come at the end of the argument list.
@safety
This cop is unsafe because changing a method signature will implicitly change behavior.
@example
# bad def foo(a = 1, b, c) end # good def baz(a, b, c = 1) end def foobar(a = 1, b = 2, c = 3) end
Constants
- MSG
Public Instance Methods
Source
# File lib/rubocop/cop/style/optional_arguments.rb, line 27 def on_def(node) each_misplaced_optional_arg(node.arguments) { |argument| add_offense(argument) } end
Private Instance Methods
Source
# File lib/rubocop/cop/style/optional_arguments.rb, line 45 def argument_positions(arguments) optarg_positions = [] arg_positions = [] arguments.each_with_index do |argument, index| optarg_positions << index if argument.optarg_type? arg_positions << index if argument.arg_type? end [optarg_positions, arg_positions] end
Source
# File lib/rubocop/cop/style/optional_arguments.rb, line 33 def each_misplaced_optional_arg(arguments) optarg_positions, arg_positions = argument_positions(arguments) return if optarg_positions.empty? || arg_positions.empty? optarg_positions.each do |optarg_position| # there can only be one group of optional arguments break if optarg_position > arg_positions.max yield arguments[optarg_position] end end