String Interpolation

[Arafel]

On 21/10/23 19:10, Walter Bright wrote:
> For DIP1027,
> 
> |int var = 67; auto s = format(i"whatever $var"); |
> 
> would be equivalent to:
> 
> |auto s = "whatever 67";|

At which point it's barely an improvement overs what we can already do:

```
int var = 67; auto s = mixin(i!"whatever $var");
```

I'm not saving even one keypress, and readability isn't that much better 
either.

And we'll end up with multiple string literals, like `r"` and `q"`, and 
then something called "interpolated string" that uses a very similar 
token `i"` but that can't be used as a string, not even in the most 
straightforward cases.

Don't you think this will be unnecessarily confusing for users?

That's why I prefer DIP1036 over DIP1027, or even YAIDIP.

I understand that you don't want to make it implicitly convertible to 
strings. Fair enough, I'm sure there are solid reasons for that. But 
please, in that case, don't call it a "string", and also don't give it a 
string-like syntax.

Perhaps "interpolated sequence" with a clearly differentiated syntax? 
That would describe the feature much better.