Derive Macro TaskGetters 

#[derive(TaskGetters)]

Derives try_get_*_task functions for enum variants containing task types.

This macro automatically generates getter functions for each variant in a TaskType enum, eliminating the need for repetitive boilerplate code. These functions retrieve tasks based on their index (encoded in the Label’s first field) and return the appropriate task type.

Examples

#[derive(TaskGetters)]
pub enum TaskType<C: Curve> {
    ScalarShareTask(Arc<dyn Task<Output = Arc<ScalarShare<C>>>>),
    BaseFieldShareTask(Arc<dyn Task<Output = Arc<BaseFieldShare<C>>>>),
    // ... more variants
}

This generates functions like:

• try_get_scalar_share_task
• try_get_base_field_share_task
• try_get_point_share_task

Each function has the signature:

pub fn try_get_<variant_name>_task<C: Curve>(
    label: Label,
    task_map: &[TaskType<C>],
) -> Result<Arc<dyn Task<Output = Arc<T>>>, ProtocolError>

Requirements

• The enum must have variants with the pattern *Task(Arc<dyn Task<Output = Arc<T>>>)
• The macro extracts the inner type T from Arc<dyn Task<Output = Arc<T>>>
• Each variant must have a corresponding try_as_* method (typically generated by EnumTryAsInner)