invalid_annotation_target

The annotation '{0}' can only be used on {1}.

The analyzer produces this diagnostic when an annotation is applied to a kind of declaration that it doesn't support.

The following code produces this diagnostic because the optionalTypeArgs annotation isn't defined to be valid for top-level variables:

import 'package:meta/meta.dart';

@optionalTypeArgs
int x = 0;

除非另有说明，文档之所提及适用于 Dart 3.7.3 版本，本页面最后更新时间: 2025-05-08。 查看文档源码 或者 报告页面问题。