Function cas

kv/memberlist/memberlist_client_test.go:229–231

(kv *Client, key string, updateFn func(*data) (*data, bool, error))

}

func cas(kv *Client, key string, updateFn func(*data) (*data, bool, error)) error {
	return casWithErr(context.Background(), kv, key, updateFn)
}

func casWithErr(ctx context.Context, kv *Client, key string, updateFn func(*data) (*data, bool, error)) error {
	fn := func(in interface{}) (out interface{}, retry bool, err error) {