How to make rsplit (like in Python) in D

[Uranuz via Digitalmars-d-learn]

On Saturday, 1 October 2016 at 18:33:02 UTC, TheFlyingFiddle 
wrote:
> On Saturday, 1 October 2016 at 16:45:11 UTC, Uranuz wrote:
>> [...]
>
> There are two reasons why this does not compile. The first has 
> to do with how retro() (and indeed most function in std.range) 
> work with utf-8 strings (eg the string type). When working on 
> strings as ranges, the ranges internally change the type of 
> ".front" from 'char' into 'dchar'. This is done to ensure that 
> algorithms working on strings do not violate utf-8.
>
> [...]

Thanks for clarification. It seems that once upon a time I'll 
write my own string wrapper that will return just slice of 
`string` pointing to source multibyte sequence as .front and will 
use it, and be happy. When I looking more at other languages 
(like Python) then I more convinced that working with UTF-8 
string as array of single bytes is not very good