class RuboCop::Cop::Lint::StringConversionInInterpolation

def autocorrect(node)
  @corrections << lambda do |corrector|
    receiver, _method_name, *_args = *node
    corrector.replace(
      node.loc.expression,
      if receiver
        receiver.loc.expression.source
      else
        'self'
      end
    )
  end
end

def on_dstr(node)
  node.children.select { |n| n.type == :begin }.each do |begin_node|
    final_node = begin_node.children.last
    next unless final_node && final_node.type == :send
    receiver, method_name, *args = *final_node
    next unless method_name == :to_s && args.empty?
    add_offense(
      final_node,
      :selector,
      receiver ? MSG_DEFAULT : MSG_SELF
    )
  end
end