class RuboCop::Cop::Lint::StructNewOverride
Checks unexpected overrides of the `Struct` built-in methods via `Struct.new`.
@example
# bad Bad = Struct.new(:members, :clone, :count) b = Bad.new([], true, 1) b.members #=> [] (overriding `Struct#members`) b.clone #=> true (overriding `Object#clone`) b.count #=> 1 (overriding `Enumerable#count`) # good Good = Struct.new(:id, :name) g = Good.new(1, "foo") g.members #=> [:id, :name] g.clone #=> #<struct Good id=1, name="foo"> g.count #=> 2
Constants
- MSG
- RESTRICT_ON_SEND
- STRUCT_MEMBER_NAME_TYPES
- STRUCT_METHOD_NAMES
Public Instance Methods
on_send(node)
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# File lib/rubocop/cop/lint/struct_new_override.rb, line 38 def on_send(node) return unless struct_new(node) do node.arguments.each_with_index do |arg, index| # Ignore if the first argument is a class name next if index.zero? && arg.str_type? # Ignore if the argument is not a member name next unless STRUCT_MEMBER_NAME_TYPES.include?(arg.type) member_name = arg.value next unless STRUCT_METHOD_NAMES.include?(member_name.to_sym) message = format(MSG, member_name: member_name.inspect, method_name: member_name.to_s) add_offense(arg, message: message) end end end