Support enumeration list

[arakov]

Enumeration list (set of named constants) should be supported.

The proposed syntax:

enum Color : enumeration(Red = 1, Blue = 2, Green = 3);

public program()
{
    Color color := Color.Red; 
}

[arakov]

A special template might be introduced - enum
So for example the following C code

enum { RED, GREEN, /*...*/ WHITE } 

will look in ELENA:

public const struct Color : enum<int>(Red = 1,Green = 2,Blue = 3);

public program()
{
   Color red := Color.Red;
   Color green := Color.Green;
}

[arakov]

Implemented in ELENA 6.2.1