srand in D

[kdevel]

On Saturday, 8 January 2022 at 23:34:17 UTC, Ali Çehreli wrote:
[...]
> Apparently, the programmer wanted uniformly distributed 
> randomness that is reproducible. That's why they use a 
> generator that is seeded with 42 there.
>
> It does produce random results but the first Fruit happens to 
> be "mango" with that seed.


enum Fruit { apple, mango, pear }
version (X86_64)
writeln(uniform!Fruit);
```

This modified program delivers a fruit mix. Alas not in the 
online version, where one is supposed to have a preference for 
apples.

> TIL, I can use uniform with a type as in uniform!Fruit. Pretty 
> cool. :)

nice. But

    enum immutable (char) [] allowed_chars = [
       'c', 'f', 'g', 'h', 'j', 'k', 'l', 'm', 'n', 'p', 'r', 't', 
'v',
       'w', 'x', 'y', 'z', '1', '2', '3', '4', '5', '6', '7', '8', 
'9'
    ];

    char q = uniform!allowed_chars;
    writeln (q);

complains with

uni2.d(11): Error: template instance `uniform!(['c', 'f', 'g', 
'h', 'j', 'k', 'l', 'm', 'n', 'p', 'r', 't', 'v', 'w', 'x', 'y', 
'z', '1', '2', '3', '4', '5', '6', '7', '8', '9'])` has no value