prefer_typing_uninitialized_variables

Prefer typing uninitialized variables and fields.

此规则自 Dart 2.0 版本起可用。

_规则集：core , recommended , flutter _

此规则提供 快速修复 。

PREFER specifying a type annotation for uninitialized variables and fields.

Forgoing type annotations for uninitialized variables is a bad practice because you may accidentally assign them to a type that you didn't originally intend to.

BAD:

class BadClass {
  static var bar; // LINT
  var foo; // LINT

  void method() {
    var bar; // LINT
    bar = 5;
    print(bar);
  }
}

BAD:

void aFunction() {
  var bar; // LINT
  bar = 5;
  ...
}

GOOD:

class GoodClass {
  static var bar = 7;
  var foo = 42;
  int baz; // OK

  void method() {
    int baz;
    var bar = 5;
    ...
  }
}

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

linter:
  rules:
    - prefer_typing_uninitialized_variables

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