Interpolation struct names and location

[Dukc]

On Wednesday, 14 February 2024 at 05:30:47 UTC, Steven 
Schveighoffer wrote:
> This is the time to debate, before it's released!
>
> -Steve

One idea. For consistency with [named character 
entities](https://dlang.org/spec/entity.html) maybe it'd be 
better if these were escape sequences too? \$identifier or 
\$(an.expression), with "i" omitted from the beginning.

Don't hesistate to stratch this idea though if you're even 
slightly against it. Since Walter already approved the present 
syntax I don't think we should spend time debating the syntax 
further.