.. SPDX-FileCopyrightText: 2019-2020 Intel Corporation .. .. SPDX-License-Identifier: CC-BY-4.0

========= Sequencer

[req.sequencer]

A type S satisfies Sequencer if it meets the following requirements:

Sequencer Requirements: Pseudo-Signature, Semantics

.. cpp:function:: S::S( const S& )

Copy constructor.

.. cpp:function:: S::~S()

Destructor.

.. cpp:function:: size_t S::operator()( const T &v )

**Requirements:** The type ``T`` must be the same as the template type argument ``T`` of the
``sequencer_node`` instance in which the ``S`` object is passed during construction.

Returns the sequence number for the provided message ``v``.

See also:

• :doc:sequencer_node class <../../flow_graph/sequencer_node_cls>