I have been scaling back my `data` usage recently ...

# language-proposals

[cedric]

I have been scaling back my data usage recently precisely because I want to avoid the syndrome to declare one just to get a toString(). My current criterion to make something a data class is: do I ever want to use instances of this class as a key to a map? (in other words, do I need hashCode/equals)? If the answer is no, I use a regular class and I override toString manually with my own toString implementation