Associative Array, get value instead of poiter using `if (auto ..)`, possible?

[Nick Treleaven]

On Saturday, 31 August 2024 at 15:38:49 UTC, ryuukk_ wrote:
> Let's see how other languages do it:
>
> ```zig
>     map.put("hello", 42);
>
>     // get pointer
>     if (map.get("hello")) |*it| {
>         std.log.debug("{}", .{it});
>     }
>
>     // get value
>     if (map.get("hello")) |it| {
>         std.log.debug("{}", .{it});
>     }
> ```
> No imports, no templates, ONE LINER

We don't have `if` callback syntax, but essentially you can do 
that:
```d
void main()
{
     int[string] test;

     test["hello"] = 42;
     test.update("hello", () => noreturn.init, (ref int x) {
         x++;
     });
     assert(test["hello"] == 43);
}
```

Omit the `ref` if you want a copy of the value. Annoyingly, the 
`int` is required, though maybe just an IFTI bug.