prefer_void_to_null

Don't use the Null type, unless you are positive that you don't want void.

此规则自 Dart 2.1 版本起可用。

此规则提供快速修复。

DON'T use the type Null where void would work.

BAD:

dartNull f() {}
Future<Null> f() {}
Stream<Null> f() {}
f(Null x) {}

GOOD:

dartvoid f() {}
Future<void> f() {}
Stream<void> f() {}
f(void x) {}

Some exceptions include formulating special function types:

dart

Null Function(Null, Null);

and for making empty literals which are safe to pass into read-only locations for any type of map or list:

dart<Null>[];
<int, Null>{};

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

analysis_options.yaml
yamllinter:
  rules:
    - prefer_void_to_null

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.

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