unnecessary_statements

Avoid using unnecessary statements.

此规则自 Dart 2.0 版本起可用。

AVOID using unnecessary statements.

Statements which have no clear effect are usually unnecessary, or should be broken up.

For example,

BAD:

myvar;
list.clear;
1 + 2;
methodOne() + methodTwo();
foo ? bar : baz;

Though the added methods have a clear effect, the addition itself does not unless there is some magical overload of the + operator.

Usually code like this indicates an incomplete thought, and is a bug.

GOOD:

some.method();
const SomeClass();
methodOne();
methodTwo();
foo ? bar() : baz();
return myvar;

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

linter:
  rules:
    - unnecessary_statements

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.