91         mBegin = other.mBegin;
95         other.mBegin = 0;
105     reference front() { return mBuffer[mBegin]; }  in front()
106     const_reference front() const { return mBuffer[mBegin]; }  in front()
121         value_type element = mBuffer[mBegin];  in popFront()
122         std::destroy_at(std::addressof(mBuffer[mBegin]));  in popFront()
123         mBegin = next(mBegin);  in popFront()
140         mBegin = previous(mBegin);  in pushFront()
142             mBuffer[mBegin] = std::forward<value_type>(element);  in pushFront()
146             new (std::addressof(mBuffer[mBegin])) value_type(std::forward<value_type>(element));  in pushFront()
155             mBuffer[mBegin] = std::forward<value_type>(element);  in pushBack()
156             mBegin = next(mBegin);  in pushBack()
174         swap(mBegin, other.mBegin);  in swap()
282         size_type index = mBegin + elementIndex;  in bufferIndex()
294     size_type mBegin = 0;    // Index of the first initialised element in mBuffer.  variable