class RuboCop::Cop::Style::NestedTernaryOperator

def on_if(node)
  loc = node.loc
  # discard non-ternary ops
  return unless loc.respond_to?(:question)
  node.each_descendant(:if) do |nested_if_node|
    if nested_if_node.loc.respond_to?(:question)
      add_offense(nested_if_node, :expression)
    end
  end
end