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Asked: 2026-05-26T16:11:17+00:00

Is it possible in Scala to make some mixin to class instance? Eg: I

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Is it possible in Scala to make some mixin to class instance?

Eg: I have some MyClass instance var x = new MyClass and I want to extend it on some method or trait without copying it.

[Edit:]
I’m looking the way to extend x after it has been instantiated.
So, for example in a function method, which gets x as a parameter.

[What is behind]
I’ve just wonder if there is some magic with implicit objects and Manifest to achieve the typeclass pattern without explicit call implicit object (like in Haskell).
But only for single object.

I know if is artificial, but I’ve just wonder if it’s possible because of lot of magic with mixing Scalas features.

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1 Answer

  1. Editorial Team

    It is not possible. You may look at using the Dynamic trait or Kevin Wright’s auto-proxy plugin, but, either way, you’ll create a new object that also answers to the original one’s method through proxying.

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