godot/doc/classes/FuncRef.xml

<?xml version="1.0" encoding="UTF-8" ?>
<class name="FuncRef" inherits="Reference" category="Core" version="3.2">
	<brief_description>
		Reference to a function in an object.
	</brief_description>
	<description>
		In GDScript, functions are not [i]first-class objects[/i]. This means it is impossible to store them directly as variables, return them from another function, or pass them as arguments.
		However, by creating a [FuncRef] using the [method @GDScript.funcref] function, a reference to a function in a given object can be created, passed around and called.
	</description>
	<tutorials>
	</tutorials>
	<methods>
		<method name="call_func" qualifiers="vararg">
			<return type="Variant">
			</return>
			<description>
				Calls the referenced function previously set by [method set_function] or [method @GDScript.funcref].
			</description>
		</method>
		<method name="call_funcv">
			<return type="Variant">
			</return>
			<argument index="0" name="arg_array" type="Array">
			</argument>
			<description>
				Calls the referenced function previously set by [method set_function] or [method @GDScript.funcref]. Contrarily to [method call_func], this method does not support a variable number of arguments but expects all parameters to be passed via a single [Array].
			</description>
		</method>
		<method name="is_valid" qualifiers="const">
			<return type="bool">
			</return>
			<description>
				Returns whether the object still exists and has the function assigned.
			</description>
		</method>
		<method name="set_function">
			<return type="void">
			</return>
			<argument index="0" name="name" type="String">
			</argument>
			<description>
				The name of the referenced function to call on the object, without parentheses or any parameters.
			</description>
		</method>
		<method name="set_instance">
			<return type="void">
			</return>
			<argument index="0" name="instance" type="Object">
			</argument>
			<description>
				The object containing the referenced function. This object must be of a type actually inheriting from [Object], not a built-in type such as [int], [Vector2] or [Dictionary].
			</description>
		</method>
	</methods>
	<constants>
	</constants>
</class>