haXe 2

Time for action – Switching over enums with parameters

Switching over an enum that has parameters is done in the same way as switching over a basic enum. The only difference is that we will have to write the names of the parameters in order to get them.

Imagine that we have an enum representing a color either as RGB or RGBA and that we want to get the string representing this color.

1. First, let's write our enum:

   enum Color
   {
      rgb(r : Int, g : Int, b : Int);
      rgba(r : Int, g : Int, b : Int, a : Int);
   }

2. Now, let's write our switch:

      public static function fromColorToString(color :Color)
      {
         switch(color)
         {
            case rgb(r, g, b):
               return "RGB(" + r + "," + g + ", " + b + ")";
            case rgba(r, g, b, a):
               return "RGB(" + r + "," + g + ", " + b + "," + a + ")";
         }
      }

What ...