Challenge: Make a data type for holding one of 8 directions allowing increment and overflow

[Salih Dincer]

On Wednesday, 13 March 2024 at 10:27:49 UTC, Basile B. wrote:
> The semantics of the operators are actually not as clear as 
> that. What if you define
>
> ```d
> enum Direction
> {
>     N = 1, NE, S = 45, SW
> }
> ```
>
> ?

Certainly! EnumMembers; can be used. The EnumMembers template 
from the std.traits module is used to retrieve all the members of 
an enumeration. It generates a tuple containing all the 
enumeration values, which can be iterated over using a foreach 
loop. In the D programming language, you can use EnumMembers to 
iterate over enum values at compile time, which is useful for 
generating code based on enum members.
Here’s a simple code example:

```d
  enum Days
  {
    Monday    = 1001,
    Tuesday   = 1010,
    Wednesday = 1011,
    Thursday  = 1100,
    Friday    = 1101,
    Saturday  = 1110,
    Sunday    = 1111
  }

  import std.traits : EnumMembers;
  foreach(day; EnumMembers!Days)
    day.writeln(":", cast(int)day);
```

SDB at 79