First Draft: opUnwrapIfTrue

[Paul Backus]

On Thursday, 16 July 2026 at 02:24:18 UTC, jmh530 wrote:
> Option 2 would be that it gets lowered to something like
> ```d
> if (match(x)
>     {
>         Some(value) => true,
>     _     => false
>     }) {
>     use(value);
> }
> ```
>
> I would think that Option 2 would kind of be more in line with 
> how rust handles in.

The issue with Option 2 is that the identifier `value` would not 
be defined inside the body of the `if` statement.

> Once you start thinking about option 1, it gets harder to think 
> about if you have `else if` parts.

Remember, `else if` is actually shorthand for

```d
else {
     if (...) { ... }
}
```

So there's no need for a special rule to handle it--you just 
treat it the same way as any other `else` block.