.. _`Empty`:

.. _`org.sysess.builtin.empty`:

Empty
`````

.. image:: empty.svg
   :width: 48


Generate empty data of inferred or specified type




Documentation
:::::::::::::

This node can only run successfully if it the output port has a concrete
type. This can be acheived either by connecting the output port to other
nodes so that the type becomes concrete or by specifying the type in the
configuration. For syntax and examples of how to specify port types in the
configuration, see :ref:`custom_ports`.


Definition
::::::::::


Output ports
............

    **<unnamed>**  <a>
        Output port containing empty data (must be connected or specified)




Configuration
.............

    **Datatype** (datatype)
        Define the datatype of the output port.







Examples
........

* :download:`BasicListOperations.syx </Examples/Sympathy/Generic/List/BasicListOperations.syx>`




Implementation
..............

.. automodule:: node_lambda
    :noindex:

.. class:: Empty
    :noindex: