Macro rain_task::register_task

macro_rules! register_task {
    ($executor: expr, $name: expr, [$($params: tt)*], $taskfn: expr) => { ... };
}

Register a given task function with complex arguments with the executor.

The task function should take individual input and output parameters as specified by $params. On call, the supplied input and output lists are unpacked, both not enough and too many of each parameter kinds is raised as a task error.

$params are surrounded with [] and may contain:

• I - a single &Datainstance.
• Is - all the remaining inputs as &[Datainstance].
• O - a single &mut Output.
• Os - all the remaining outputs as &mut [Output].

Examples

// Simple task with 2 inputs and 1 output (notice the freedom in arg order).
fn task_hello(_ctx: &mut Context, in1: &DataInstance, out: &mut Output, in2: &DataInstance) -> TaskResult<()> { ... }
// Register with:
register_task!(s, "hello", [I O I], task_hello);

// Task with one input, then arbitrarily many remaining inputs and one output
fn task_concat(_ctx: &mut Context, separator: &DataInstance, ins: &[DataInstance], out: &mut Output) -> TaskResult<()> { ... }
// Register with:
register_task!(s, "hello", [I Is O], task_hello);