Implicit @Safe Resources

[Richard (Rikki) Andrew Cattermole]

On 04/09/2023 2:15 AM, Menshikov wrote:
> We have an unnecessary memory overhead. 2 bytes became 4 bytes.

A uint is 4 bytes. So it would be 4 to 8 on 32bits. On 64bit that would 
be 16 bytes due to alignment.

But it doesn't have to be wasteful.

```d
union {
	uint id;
	void* ptr;
}
```