Why is Scala's Addable deprecated?

Question

I noticed that Addable is deprecated, while Subtractable is not. What\'s wrong with Addable, and why is Subtractable different?

Answer 1

The problem is that + is overloaded to concatenate String to non-strings. So, whenever you use the + method on a type that doesn't have it, you'll get an error message that is not related to the real problem: that the type you have isn't the one you expected.

There's +: and :+ to replace it.