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.. DO NOT EDIT THIS FILE, but the doc/base/classes.xml source instead.

.. _class_GDFunctionState:

GDFunctionState
===============

**Inherits:** :ref:`Reference<class_reference>` **<** :ref:`Object<class_object>`

**Category:** Core

Brief Description
-----------------

State of a function call after yielding.

Member Functions
----------------

+--------------------------------+------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`        | :ref:`is_valid<class_GDFunctionState_is_valid>`  **(** :ref:`bool<class_bool>` extended_check=false  **)** const |
+--------------------------------+------------------------------------------------------------------------------------------------------------------+
| :ref:`Variant<class_variant>`  | :ref:`resume<class_GDFunctionState_resume>`  **(** :ref:`Variant<class_variant>` arg=NULL  **)**                 |
+--------------------------------+------------------------------------------------------------------------------------------------------------------+

Description
-----------

Calling :ref:`@GDScript.yield<class_@GDScript_yield>` within a function will cause that function to yield and return its current state as an object of this type. The yielded function call can then be resumed later by calling :ref:`resume<class_GDFunctionState_resume>` on this state object.

Member Function Description
---------------------------

.. _class_GDFunctionState_is_valid:

- :ref:`bool<class_bool>`  **is_valid**  **(** :ref:`bool<class_bool>` extended_check=false  **)** const

Check whether the function call may be resumed. This is not the case if the function state was already resumed.

If ``extended_check`` is enabled, it also checks if the associated script and object still exist. The extended check is done in debug mode as part of :ref:`GDFunctionState.resume<class_GDFunctionState_resume>`, but you can use this if you know you may be trying to resume without knowing for sure the object and/or script have survived up to that point.

.. _class_GDFunctionState_resume:

- :ref:`Variant<class_variant>`  **resume**  **(** :ref:`Variant<class_variant>` arg=null  **)**

Resume execution of the yielded function call.

If handed an argument, return the argument from the :ref:`@GDScript.yield<class_@GDScript_yield>` call in the yielded function call. You can pass e.g. an :ref:`Array<class_array>` to hand multiple arguments.

This function returns what the resumed function call returns, possibly another function state if yielded again.