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kotlinlang

What is the reason for classes not having a companion object by default?
Lately I have been very fond of using extension functions on the companion object in my tests to create convenient functions for creating test-data. I guess I could use context receivers but using the companion objects feels a lot cleaner in my opinion.

E.g.
```data class SomeComplexClass(…) ```
In test:
```fun SomeComplexClass.Companion.default(): SomeComplexClass = …
fun SomeComplexClass.Companion.random(): SomeComplexClass = …```
Today I have to explicit add an empty companion object for this to be possible:
```data class SomeComplexClass(..) {
    companion object
}```

I guess because that’s one instance of the class more on the heap that may often not be needed.

I guess it could have been possible to add optimization flags on the compiler :shrug:  but I guess you are right

There's a potential solution in the works for this. Lots of relevant links on this ticket: <https://youtrack.jetbrains.com/issue/KT-11968>