If you could make any changes to D, what would they look like?

[Adam D Ruppe]

On Wednesday, 20 October 2021 at 17:28:30 UTC, Guillaume Piolat 
wrote:
> One of the problem C++ has with 
> objects-with-inheritance-as-value-type is "object slicing".

That's why:

void foo(Object o) {} // error: cannot declare variable of class 
value type; the rule is still they're always references

It still requires you to always use it by reference, you just 
have to write it out differently.