mixin_instantiate

Mixins can't be instantiated.

The analyzer produces this diagnostic when a mixin is instantiated.

The following code produces this diagnostic because the mixin M is being instantiated:

mixin M {}

var m = M();

If you intend to use an instance of a class, then use the name of that class in place of the name of the mixin.

Unless stated otherwise, the documentation on this site reflects Dart 3.7.3. Page last updated on 2025-05-08. View source or report an issue.