DispatchOperators.swift

// Dispatch
//
// Usage:
// Async dispatch to main queue
//     -->block
// Async dispatch to queue
//     queue --> block
// Sync dispatch to main queue
//     -->|block
// Sync dispatch to queue
//     queue -->| block
//

operator prefix --> {}
operator infix --> {}
operator prefix -->| {}
operator infix -->| {}

@prefix func --> (block:(Void->Void)?) {
    dispatch_get_main_queue() --> block
}

@infix func --> (queue:dispatch_queue_t, block:(Void->Void)?) {
    if block {
        dispatch_async(queue, block!)
    }
}

@prefix func -->| (block:(Void->Void)?) {
    dispatch_get_main_queue() -->| block
}

@infix func -->| (queue:dispatch_queue_t, block:(Void->Void)?) {
    if block {
        dispatch_sync(queue, block!)
    }
}