conver BigInt to string

[Namal via Digitalmars-d-learn]

On Thursday, 5 November 2015 at 16:45:10 UTC, Meta wrote:
> On Thursday, 5 November 2015 at 16:29:30 UTC, Namal wrote:
>> Hello I am trying to convert BigInt to string like that while 
>> trying to sort it:
>>
>> string s1 = to!string(a).dup.sort;
>>
>> and get an error
>>
>> cannot implicitly convert expression (_adSortChar(dup(to(a)))) 
>> of type char[] to string
>>
>> what do I do wrong?
>
> Try this instead:
>
> string s1 = to!string(a).idup.sort()
>
If I try it like that i get:

Error: template std.algorithm.sorting.sort cannot deduce function 
from argument types !()(char[]), candidates are:

/../src/phobos/std/algorithm/sorting.d(996):