Performing bit-mask operations is possible via the Data.Bits operations (on
elements of type Word8 or Word16, etc.). But I must say, it doesn't seem
very `natural` in Haskell, nor even in other languages. It crosses lines,
binding abstraction to representation in order to improve efficiency.
The natural way in Haskell to model model `CREATURE_OR_GAMEOBJECT` would
simply be as a function (e.g. of type Object -> Bool, or ObjectType ->
Bool).
Regards,
Dave
2012/1/22 Данило Глинський
What is natural Haskell representation of such enum?
enum TypeMask { UNIT, GAMEOBJECT,
CREATURE_OR_GAMEOBJECT = UNIT | GAMEOBJECT };
More sophisticated question is: and what data structures must be used when converting this naturally one to Haskell?
// 1-byte flaged enum enum TypeMask { // ... UNIT = 0x0004, GAMEOBJECT = 0x0008, // ...
CREATURE_OR_GAMEOBJECT = UNIT | GAMEOBJECT WORLDOBJECT = UNIT | PLAYER | GAMEOBJECT | DYNAMICOBJECT | CORPSE // ... even more enum combos ... };
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