有没有办法从 Scala 实例中删除 Trait?
我想知道是否有一个在运行时添加了特征的实例,是否可以从该实例中删除该特征,以便它可以像原来一样运行。
I would like to know if having an instance to which a trait has been added to in runtime, it is possible to remove the trait off the instance, so it can behave as originally.
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特征在编译时与类结合。因此不可能在运行时添加/删除特征。
对于您的特定情况,请考虑向您的类添加一个方法:
然后您可以调用
instance.original()
来获取不受任何特征影响的对象的副本。Traits are combined with classes at compile-time. So it is not possible to add/remove traits at run-time.
For your particular case, consider adding a method to your class:
Then you can call
instance.original()
to get back a copy of your object that is not affected by any traits.这是不可能的。该实例属于一个类,该特征的代码是该类的一部分。
如果 JVM 支持类似“class+traits”的东西,那么理论上就有可能恢复它。
It is not possible. That instance belongs to a class of which the trait's code is part of.
If JVM supported something like "class+traits", then it would be theoretically possible to revert that.