Interpolated strings

[Martin Tschierschke via Digitalmars-d]

On Monday, 17 April 2017 at 19:41:14 UTC, Jonas Drewsen wrote:
> On Monday, 17 April 2017 at 19:12:37 UTC, Martin Tschierschke 
> wrote:
>> defining a new method exho! (derived from echo + mixin...:-)
>>
>>   auto exho(string x)(){
>>      return mixin("writeln("~interp!x~")");}
>>
>> You can just write:
>>
>>    exho!"The number ${num} doubled is ${num * 2}!"
>
> It requires 'num' to be available to the exho function 
> definition so will not
> work in the general case.
Thats a pity, so shouldn't we than try to find a way to define a 
alias like 'shortcut'
for something like

         mixin(compiletime_expresion!var)

so we can write just

         shortcut!var     ?

Or what about defining a new return type for functions allowing 
them to return a mixin  even if defined in a lib? (Because the 
code above is allowed but only working if exho is defined in the 
same scope as the var 'num'.)

Regards mt.