Promise Package Types

Promise

type Promise[T any] interface {
	Resolve(result T)
	Reject(err error)
	Then(func(T) interface{}) Promise[interface{}]
	Catch(func(error) interface{}) Promise[interface{}]
	Await() (T, error)
	AwaitWithContext(ctx context.Context) (T, error)
	AwaitWithTimeout(timeout time.Duration) (T, error) // Added method
	Cancel()
}

Promise represents an asynchronous operation that can be resolved or rejected.

promiseImpl

type promiseImpl[T any] struct {
    ctx        context.Context
    cancelFunc context.CancelFunc
    result     T
    err        error
    doneChan   chan struct{}
    once       sync.Once
}

promiseImpl is a concrete type implementing the Promise interface.

Last modified: 28 January 2025