Getting the string representing the enum value

[Ben Gardner]

I've done that "the hard way" in C.
Here's an example in D:

/////
import std.stdio;
import std.string;

enum X {
  Apple,
  Bat,
  Car,
}

char [][] X_names = [
   X.Apple : "Apple",
   X.Bat   : "Bat",
   X.Car   : "Car",
];

char [] get_X_name(X e)
{
   if ((e >= X.min) && (cast(int)e < X_names.length) &&
       (X_names[e] !is null)) {
      return X_names[e];
   }
   return ("invalid");
}

X get_X_id(char [] name)
{
   for (int idx = 0; idx < X_names.length; idx++) {
      if ((X_names[idx] !is null) && (icmp(X_names[idx], name) == 0))
         return cast(X)idx;
   }
   return cast(X)-1;
}

void main(char [][] args)
{
   for (int i = -1; i < 4; i++)
   {
      writef("%d = '%s'\n", i, get_X_name(cast(X)i));
   }

   char [] name = "bat";
   writef("id for '%s' is %d\n", name, cast(int)get_X_id(name));
}
////

Running this produces the output:
-1 = 'invalid'
0 = 'Apple'
1 = 'Bat'
2 = 'Car'
3 = 'invalid'
id for 'bat' is 1

Ben

Hasan Aljudy wrote:
> say I have an enum
> 
>     enum X
>     {
>      A,
>      B,
>      C
>     }
> 
> and I have
> 
>     void someFunc( X e )
>     {
>      //.. some code
>     }
> 
> I want to print the value of 'e' but I don't want to get a number!! I
> want to get a string that represents it. i.e. A or B or C
> 
> 
>     void someFunc( X e )
>     {
>        toString(e);
>        e.string;
>        e.value;
>        //or something like that ..
>     }
> 
> Is there any such thing in D?
>