godot/modules/gdscript/tests/scripts/analyzer/errors/abstract_methods.gd

@abstract class AbstractClass:
	@abstract func some_func()

class ImplementedClass extends AbstractClass:
	func some_func():
		pass

@abstract class AbstractClassAgain extends ImplementedClass:
	@abstract func some_func()

class Test1:
	@abstract func some_func()

class Test2 extends AbstractClass:
	pass

class Test3 extends AbstractClassAgain:
	pass

class Test4 extends AbstractClass:
	func some_func():
		super()

	func other_func():
		super.some_func()

@abstract class A:
	@abstract @abstract func abstract_dup()

	# An abstract function cannot have a body.
	@abstract func abstract_bodyful():
		pass

	# A static function cannot be marked as `@abstract`.
	@abstract static func abstract_stat()

@abstract @abstract class DuplicateAbstract:
	pass

func test():
	pass