The state of string interpolation

[Mike Franklin]

On Thursday, 6 December 2018 at 20:00:02 UTC, H. S. Teoh wrote:
> Now, I'm also thinking about how to minimize the "surface area" 
> of language change in order to make this proposal more likely 
> to be accepted by W&A.

IMO the one thing that will likely get this across the finish 
line is to generalize it:

1) What is the fundamental missing language feature that is 
preventing us from implementing interpolated strings in the 
library?

2) What other use cases besides string interpolation would be 
enabled by adding such a feature?

If a compelling language feature that has more uses beyond string 
interpolation can be engineered and/or discovered, I think it 
will have a much better chance of being accepted.

Mike