How can we make it easier to experiment with the compiler?

[Andrei Alexandrescu]

On 5/24/21 1:15 AM, Nicholas Wilson wrote:
> Indeed is fixes a different problem, but it makes fixing failure to 
> encapsulate much easier.

I think the best first step is to add `private` to the codebase. This is 
cheap to get into and informs any future refactoring. I find it 
confusing that people push for massive reorganization for years, but 
won't bother to create 50 line PRs that add `private` appropriately.