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GD0002: Missing partial modifier on declaration of type which contains nested classes that derive from GodotObject

==================================== ====================================== Value ==================================== ====================================== Rule ID GD0002 Category Usage Fix is breaking or non-breaking Non-breaking Enabled by default Yes ==================================== ======================================

Cause​

A type that derives from GodotObject is contained in a non-partial type declaration.

Rule description​

Godot source generators add generated code to user-defined types to implement the integration with the engine. Source generators can't add generated code to types that aren't declared partial.

public class InvalidParentType
{
    // MyNode is contained in a non-partial type so the source generators
    // can't enhance this type to work with Godot.
    public partial class MyNode : Node { }
}

public partial class ValidParentType
{
    // MyNode is contained in a partial type so the source generators
    // can enhance this type to work with Godot.
    public partial class MyNode : Node { }
}

How to fix violations​

To fix a violation of this rule, add the partial keyword to the type declaration.

When to suppress warnings​

Do not suppress a warning from this rule. Types that derive from GodotObject but aren't partial can't be enhanced by the source generators, resulting in unexpected runtime errors.