Method PopAndPush

eval/eval/evaluator_stack.h:225–230

                std::conjunction_v<std::is_convertible<V, cel::Value>,
                                   std::is_convertible<A, AttributeTrail>>>>
  void PopAndPush(V&& value, A&& attribute) {
    ABSL_DCHECK(!empty());

    *(values_ - 1) = std::forward<V>(value);
    *(attributes_ - 1) = std::forward<A>(attribute);
  }

  // Equivalent to `PopAndPush(1, ...)`.
  template <typename V,