`alias x = v.x;` not working in struct bodies?

[Danilo]

On Saturday, 20 January 2024 at 09:00:22 UTC, Danilo wrote:
> ```d
> struct Vec2 {
>     int x, y;
> }
>
> struct Vec3 {
>     Vec2 v;
>     alias x = v.x;
>     alias y = v.y;
>     ...
> }
> ```
>
> Can't `alias` targets be used in method bodies?
>
> In the method/constructor parameters it's working as expected. 
> But not inside the bodies?
>
> Documentation:
> - https://dlang.org/spec/declaration.html#alias
> - https://dlang.org/spec/declaration.html#alias-variable
>
> According to the link `alias-variable` I would expect my 
> example to work.
> Aliasing a variable (struct member), it's a symbol.

We figured it out on Discord. `alias` works only with static 
variables and members:

```d
struct Vec2 {
     static int x, y;
}

struct Vec3 {
     static Vec2 v;
     ...
```

The documentation i mentioned above didn't explicitely say it's 
for use with `static` variables/members only.