no_runtimeType_toString

Avoid calling toString() on runtimeType.

此规则自 Dart 2.8 版本起可用。

Calling toString on a runtime type is a non-trivial operation that can negatively impact performance. It's better to avoid it.

BAD:

class A {
  String toString() => '$runtimeType()';
}

GOOD:

class A {
  String toString() => 'A()';
}

This lint has some exceptions where performance is not a problem or where real type information is more important than performance:

• in an assertion
• in a throw expression
• in a catch clause
• in a mixin declaration
• in an abstract class declaration

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

linter:
  rules:
    - no_runtimeType_toString

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.