.. SPDX-FileCopyrightText: 2019-2021 Intel Corporation .. .. SPDX-License-Identifier: CC-BY-4.0

====== feeder

[algorithms.parallel_for_each.feeder]

Inlet into which additional work items for a parallel_for_each can be fed.

.. code:: cpp

// Defined in header <oneapi/tbb/parallel_for_each.h>

namespace oneapi {
    namespace tbb {

        template<typename Item>
        class feeder {
        public:
            void add( const Item& item );
            void add( Item&& item );
        };

    } // namespace tbb
} //namespace oneapi

Member functions

.. cpp:function:: void add( const Item& item )

Adds item to a collection of work items to be processed.

**Requirements**: The ``Item`` type must meet the `CopyConstructible` requirements from the [copyconstructible] section of the ISO C++ Standard.

.. cpp:function:: void add( Item&& item )

Same as the above but uses the move constructor of ``Item``, if available.

**Requirements**: The ``Item`` type must meet the `MoveConstructible` requirements from the [moveconstructible] section of the ISO C++ Standard.

.. caution::

Must be called from a ``Body::operator()`` created by the ``parallel_for_each`` function.
Otherwise, the termination semantics of method ``operator()`` are undefined.