String Interpolation

[Patrick Schluter]

On Saturday, 21 October 2023 at 12:38:52 UTC, Commander Zot wrote:
> can we please just have ```i"whatever ${var}"``` to return a 
> fully interpolated string, not a tuple, not a template or 
> anything.
> because the common use case is ```auto s = i"whatever 
> ${var}";```,
> so maybe just lower it into ```format("whatever %s", var)```.
>
> Then also introduce ```t"whatever ${var}"``` for a 
> tuple/template returned object as a completely seperate 
> proposal and you discuss whatever proposal is better for it 
> YADIP or 1037 or whatever.
>
> this way it's also a lot simpler to understand what is 
> happening for the users.

Interpolated strings, even if they look like it, are NOT strings. 
They are a obfuscated or better said, conveniently laid out 
source code.

They contain inside of them, between the {} program code even if 
it is just a variable name. Strings are strictly just data. 
Interpolated string is a mix of CODE and data.

By the very nature of what interpolated strings are it is not 
possible to treat them as strings.