avoid_returning_null_for_void

Avoid returning null for void.

此规则自 Dart 2.1 版本起可用。

_规则集：recommended , flutter _

此规则提供 快速修复 。

AVOID returning null for void.

In a large variety of languages void as return type is used to indicate that a function doesn't return anything. Dart allows returning null in functions with void return type but it also allow using return; without specifying any value. To have a consistent way you should not return null and only use an empty return.

BAD:

void f1() {
  return null;
}
Future<void> f2() async {
  return null;
}

GOOD:

void f1() {
  return;
}
Future<void> f2() async {
  return;
}

要启用 avoid_returning_null_for_void 规则，请在你的 analysis_options.yaml 文件中，在 linter > rules 下添加 avoid_returning_null_for_void ：

linter:
  rules:
    - avoid_returning_null_for_void

除非另有说明，否则本网站上的文档反映的是 Dart 3.6.0。页面最后更新于 2025-02-05。 查看源代码 或 报告问题.