[Info-vax] C limitations, was: Re: VMS process communication

[Arne Vajhøj]

On 3/27/2023 6:46 PM, Arne Vajhøj wrote:
> On 3/27/2023 6:16 PM, Johnny Billquist wrote:
>> On 2023-03-27 14:27, Simon Clubley wrote:
>>> enums are integers, not a type.
>>
>> Not sure I consider the enum thing to be much of a deal. Unless we 
>> compare to Ada, which is the only language I've seen which really do 
>> enums properly as its own type.
> 
> Java enums are also very much non-int.

And some languages require some "arm twisting"
to make enums work like integers.

VMS Pascal:

program enumchk(input,output);

type
    direction = (north, south, west, east);
    color = (red, green, blue, yellow);
    material = (wood, iron, concrete);

var
    d : direction;
    c : color;
    m : material;

begin
    d := west;
    c := green;
    m := (ord(d) div ord(c))::material;
    writeln(m);
end.

and C#:

using System;

namespace EnumChk
{
     enum Direction { North, South, West, East }
     enum Color { Red, Green, Blue, Yello }
     enum Material { Wood, Iron, Concrete }
     public class Program
     {
         public static void Main(string[] args)
         {
             Direction d = Direction.West;
             Color c = Color.Green;
             Material m = (Material)((int)d / (int)c);
             Console.WriteLine(m);
             Console.ReadKey();
         }
     }
}

both write concrete (different case), but one could
argue that the programmer asked for it.

Arne