instantiate_enum

Enums can't be instantiated.

The analyzer produces this diagnostic when an enum is instantiated. It's invalid to create an instance of an enum by invoking a constructor; only the instances named in the declaration of the enum can exist.

The following code produces this diagnostic because the enum E is being instantiated:

// @dart = 2.16
enum E {a}

var e = E();

If you intend to use an instance of the enum, then reference one of the constants defined in the enum:

// @dart = 2.16
enum E {a}

var e = E.a;

除非另有说明，文档之所提及适用于 Dart 3.7.3 版本，本页面最后更新时间: 2025-05-08。 查看文档源码 或者 报告页面问题。