One area where D has the edge

[bachmeier via Digitalmars-d]

On Monday, 26 January 2015 at 20:55:14 UTC, Wyatt wrote:
> On Monday, 26 January 2015 at 20:19:09 UTC, Laeeth Isharc wrote:
>>
>> Does Rust have the productivity of D?  And it doesn't have the 
>> maturity, as I understand it.
>
> This brings up something that's been bugging me.  D has a pitch 
> for users of a lot of crappy languages, but what do we say when 
> the competition isn't a total slouch?
>
> This exchange (names changed) is what started this train of 
> thought:
> <chum> though i don't understand what the point of D is either 
> because once you've already accepted a gc there are better 
> languages you could use
> <chum> and if you refuse to accept one, then, well, you either 
> have c++11 or you wait for rust to be usable
> <otherguy> chum: what is better than D once youre willing to 
> have managed mem?
> <chum> it's functional, but the complaint all the gamedev folks 
> have about fp langs is that their implementations are usually 
> garbage collected and they can't accept gc pauses
> <chum> otherguy: f#, ocaml, haskell
>
> Particularly against F#, I'm not sure what to say (it's a 
> pretty interesting language, even if it's kind of ugly to look 
> at and CIL-ly).  Thoughts?
>
> -Wyatt

Which language today does something that's not done by any other 
language?