type_literal_in_constant_pattern

Don't use constant patterns with type literals.

此规则自 Dart 3.0 版本起可用。

_规则集：core , recommended , flutter _

此规则提供 快速修复 。

If you meant to test if the object has type Foo, instead write Foo _.

BAD:

void f(Object? x) {
  if (x case num) {
    print('int or double');
  }
}

GOOD:

void f(Object? x) {
  if (x case num _) {
    print('int or double');
  }
}

If you do mean to test that the matched value (which you expect to have the type Type) is equal to the type literal Foo, then this lint can be silenced using const (Foo).

BAD:

void f(Object? x) {
  if (x case int) {
    print('int');
  }
}

GOOD:

void f(Object? x) {
  if (x case const (int)) {
    print('int');
  }
}

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

linter:
  rules:
    - type_literal_in_constant_pattern

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.