.. SPDX-FileCopyrightText: 2019-2020 Intel Corporation .. .. SPDX-License-Identifier: CC-BY-4.0 ============================= Concurrently unsafe modifiers ============================= All member functions in this section can only be performed serially. The behavior is undefined in case of concurrent execution of these methods with other (either concurrently safe) methods. clear ----- .. code:: cpp void clear(); Destroys all elements in ``*this``.