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
<abcz2.uprola@gmail.com>
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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