Error while generate DNA with uniform()

[Salih Dincer]

On Saturday, 3 September 2022 at 14:25:48 UTC, Steven 
Schveighoffer wrote:
>  [...] what you need anyway is a `char`, so just return a 
> `char`. [...]

Clean-cut, thank you!

It's very clear to me...

```d
import std;
void main()
{
   alias fp = char function() @system;
   enum DNA : char
   {
       timin = 'T',
     sitozin = 'C',
      guanin = 'G',
      adenin = 'A'
   }
   fp getDNA = () => uniform!"[]"(DNA.min,
                                  DNA.max);
   enum n = 30;
   auto genes = generate!getDNA.take(n).array;
   auto unique = genes.uniq.array;
           // AAAACATCATGGTAGGCCTTTCATGCGCTA
   assert(unique.length < n, "no repeat");
   unique.writeln; // ACATCATGTAGCTCATGCGCTA
}
```
SDB at 79