First Draft: Static Single Assignment

[jmh530]

On Tuesday, 18 November 2025 at 17:05:56 UTC, Tim wrote:
> On Tuesday, 18 November 2025 at 13:31:00 UTC, Quirin Schroll 
> wrote:
>> [...]
>
> For full C++ interop it would also be needed for the hidden 
> `this` parameter of methods, but `final` on methods already 
> means something different:
> ```
> extern(C++) class C
> {
>     void f() final; // Does final mean head const here?
> }
> ```
>
> The syntax could distinguish between `final` before and after 
> the declaration, but that could be confusing. It would be 
> better to use a different keyword for head const with C++ 
> compatibility.

Good point.