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

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

Redot 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 Redot.
    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 Redot.
    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.