.. _reusable_promise: ================ reusable_promise ================ -------------------------- A ``reusable_promise`` allows a coroutine to return values to the caller multiple times. ``reusable_promise`` satisfies the ``Reoccurring`` concept. The coroutine key words available are ``co_yield (ARG)``, ``co_return (ARG)`` where T is constructible from ``ARG``, and ``co_yield (std::nullopt_t)``, ``co_return (std::nullopt_t)`` in the case the promise cannot be fulfilled. -------------------------- .. doxygenclass:: zab::reusable_promise :members: :protected-members: :undoc-members: