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Huge thanks to JohnVeness, AThousandShips, and Meorge for their great help rewording my broken English.
58 lines
1.9 KiB
Markdown
58 lines
1.9 KiB
Markdown
---
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type: entry
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section: scripting
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subsection: gdscript
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rank: 1
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importance: 3
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anchor: abstract-classes-and-methods
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title: Abstract classes and methods
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blockquote: U Can’t Touch This
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text: |
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You can now declare GDScript classes to be abstract. Declaring a class abstract means that the class is not meant to be instantiated directly. That means that you can prevent instances of a class, let’s say, ``@[Animal](usertype)``, that doesn’t have any purpose on its own other than to be extended by "concrete" classes like ``@[Cat](usertype)`` and ``@[Dog](usertype)``.
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Abstract classes can also have abstract methods. This means that the method must be implemented in any class that extends it.
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<figure class="file">
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<figcaption>animal.gd</figcaption>
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```manual
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@[@abstract](gdscript-annotation)
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@[class_name](keyword) Animal @[extends](keyword) @[Node](enginetype)
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@[@abstract](gdscript-annotation)
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@[func](keyword) @[cry](function)@[() ->](symbol) @[void](basetype)
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```
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</figure>
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<figure class="file">
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<figcaption>cat.gd</figcaption>
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```manual
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@[class_name](keyword) Cat @[extends](keyword) @[Animal](usertype)
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@[func](keyword) @[cry](function)@[() ->](symbol) @[void](basetype)
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@[# Must be implemented, otherwise an error will be thrown.](comment)
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@[print](function)@[(](symbol)@["Meow!"](string)@[)](symbol)
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```
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</figure>
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contributors:
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- name: Aaron Franke
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github: aaronfranke
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- name: Danil Alexeev
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github: dalexeev
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- name: Ryan Brue
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github: ryanabx
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read_more:
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https://github.com/godotengine/godot/pulls?q=is%3Apr+is%3Amerged+67777+106409+107717
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image_alt: "Image of the Add Node window displaying the dimmed out abstract Animal
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node, and its two extending classes Cat and Dog."
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image_src: /storage/releases/4.5/images/gdscript-abstract.webp
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image_src_2x: /storage/releases/4.5/images/gdscript-abstract-2x.webp
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media_position: top
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position: center-left
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---
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