How to loop through characters of a string in D language?

[Ola Fosheim Grøstad]

On Sunday, 12 December 2021 at 08:58:29 UTC, Ola Fosheim Grøstad 
wrote:
>         this(string s)@trusted{
>             begin = s.ptr;
>             end = s.ptr + s.length;
>         }
> 	}

Bug, it fails if the string ends or starts with ';'.

Fix:

```
         this(string s)@trusted{
             begin = s.ptr;
             end = s.ptr + s.length;
             while(begin!=end && *begin==stripchar) begin++;
             while(begin!=end && *(end-1)==stripchar) end--;
         }
```