feat: change result of AllOf from struct{} to []T

Signed-off-by: jizhuozhi <jizhuozhi.george@gmail.com>

api.go

@@ -108,28 +108,31 @@ func ToAny[T any](f *Future[T]) *Future[any] {
 	})
 }
 
-func AllOf[T any](fs ...*Future[T]) *Future[struct{}] {
+func AllOf[T any](fs ...*Future[T]) *Future[[]T] {
 	if len(fs) == 0 {
-		return Done(struct{}{})
+		return Done[[]T](nil)
 	}
 
 	var done uint32
-	s := &state[struct{}]{}
+	s := &state[[]T]{}
 	c := int32(len(fs))
-	for _, f := range fs {
+	results := make([]T, len(fs))
+	for i, f := range fs {
+		i := i
 		f.state.subscribe(func(val T, err error) {
 			if err != nil {
 				if atomic.CompareAndSwapUint32(&done, 0, 1) {
-					s.set(struct{}{}, err)
+					s.set(nil, err)
 				}
 			} else {
+				results[i] = val
 				if atomic.AddInt32(&c, -1) == 0 {
-					s.set(struct{}{}, nil)
+					s.set(results, nil)
 				}
 			}
 		})
 	}
-	return &Future[struct{}]{state: s}
+	return &Future[[]T]{state: s}
 }
 
 func Timeout[T any](f *Future[T], d time.Duration) *Future[T] {

api_test.go

@@ -327,9 +327,9 @@ func TestAllOf(t *testing.T) {
 	}
 
 	f := AllOf(fs...)
-	_, err := f.Get()
+	results, err := f.Get()
+	assert.Equal(t, vals, results)
 	assert.NoError(t, err)
-
 	for i := 0; i < 10; i++ {
 		ff := fs[i]
 		val, err := ff.Get()
@@ -342,7 +342,7 @@ func TestAllOfEmpty(t *testing.T) {
 	fs := make([]*Future[int], 0)
 	f := AllOf(fs...)
 	r, err := f.Get()
-	assert.Equal(t, struct{}{}, r)
+	assert.Equal(t, []int(nil), r)
 	assert.NoError(t, err)
 }