class Opal::Rewriters::ReturnableLogic

def on_if(node)
  test, = *node.children
  check_control_flow!(test)
  # The if_test metadata signifies that we don't care about the return value except if it's
  # truthy or falsy. And those tests will be carried out by the respective $truthy helper calls.
  test.meta[:if_test] = true if test
  super
end