GD0111: The exported tool button must be an expression-bodied property
| Value | |
|---|---|
| Rule ID | GD0111 |
| Category | Usage |
| Fix is breaking or non-breaking | Non-breaking |
| Enabled by default | Yes |
Cause
A property is annotated with the [ExportToolButton] attribute but it's not an expression-bodied property.
Rule description
When reloading the .NET assembly, Godot will attempt to serialize exported members to preserve their values. A field or a property with a backing field that stores a Callable may prevent the unloading of the assembly.
An expression-bodied property doesn't have a backing field and won't store the Callable, so Godot won't attempt to serialize it, which should result in the successful reloading of the .NET assembly.
csharp
[ExportToolButton("Click me!")]
public Callable ValidClickMeButton => Callable.From(ClickMe);
// Invalid because the Callable will be stored in the property's backing field.
[ExportToolButton("Click me!")]
public Callable InvalidClickMeButton { get; } = Callable.From(ClickMe);How to fix violations
To fix a violation of this rule, replace the property implementation with an expression-bodied property.
When to suppress warnings
Do not suppress a warning from this rule. Callable instances may prevent the .NET assembly from unloading.