First Draft: Static Single Assignment

[Walter Bright]

On 11/23/2025 6:44 AM, Richard (Rikki) Andrew Cattermole wrote:
> Explicitly stating that final will bind to the function declaration, not its 
> this pointer is required.
> 
> Really the only way to get out of this is to use different keywords.

We already disambiguate it for other attributes, which is why I think about 
making the `this` explicit.