Method allocSlot

src/ArduinoJson/Memory/MemoryPool.hpp:65–72

  }

  Slot<T> allocSlot() {
    if (!slots_)
      return {};
    if (usage_ >= capacity_)
      return {};
    auto index = usage_++;
    return {slots_ + index, SlotId(index)};
  }

  T* getSlot(SlotId id) const {
    ARDUINOJSON_ASSERT(id < usage_);