Add the ability to Enumerate variables

[GeoffChisholm]

We often use integer type variables to represent a number of states. It would be a powerful feature if you could declare names for the different integer values. Similar to the Enum feature in C. As an example you may have an integer variable for the Day of the Week with values from 1 to 7 and throughout the program we check if the value is a particular value for a particular day. If we could assign names to integral constants, then use those names this would make a program easy to read and maintain.

[dnordenberg1]

Sounds a bit similar to how the "edit bit rank" feature of a DDT works on INT bits while this suggestion would apply the defined names/states to the INT as a whole instead of single bits...

[Bosswaffle]

I'd love to use a CASE statment in ST with strings instead of D/INTS, or at least be abel to name the case steps.