DIP 1027---String Interpolation---Format Assessment

[Walter Bright]

On 2/25/2020 9:44 AM, H. S. Teoh wrote:
> On Mon, Feb 24, 2020 at 10:54:34PM -0800, Walter Bright via Digitalmars-d-announce wrote:
> [...]
>> Writing that an implementation must refer to specific templates
>> implies that the behavior is customizable by the user via modifying
>> those templates.
> 
> I think this is where the misunderstanding is. The proposed template is
> defined by druntime, and is NOT customizable by the user.

Requiring the compiler to use a specific template that is not specified by the 
user has no place in a language specification (and therefore no place in a 
proposed language change).

The specification does NOT specify how it should be implemented.