cannot sort an array of char

[via Digitalmars-d-learn]

On Wednesday, 5 November 2014 at 12:54:03 UTC, Ivan Kazmenko 
wrote:
> Hi!
>
> This gives an error (cannot deduce template function from 
> argument types):
>
> -----
> import std.algorithm;
> void main () {
> 	char [] c;
> 	sort (c);
> }
> -----
>
> Why is "char []" so special that it can't be sorted?
>
> For example, if I know the array contains only ASCII 
> characters, sorting it sounds no different to sorting an "int 
> []".

Hmm... this doesn't work either:

     import std.algorithm;
     import std.utf;
     void main () {
         char [] c;
         sort (c.byCodeUnit);
     }

But IMO it should.