apokroy

Hello! Is there any way to overload operators for enumerations? I'm having fun trying to implement a Tri-State Boolean and Optional types, but I'm forced to use a record type for operators. Records look a bit ugly, have performance, RTTI and published properties issues ... Now, my code looks like this: TriBoolEnum = (Unknown, ExactFalse, ExactTrue); TriBoolSet = set of TriBoolEnum; TriBool = record private FValue: TriBoolEnum; public class operator Initialize(out Value: TriBool); class operator Implicit(const Value: Boolean): TriBool; static; inline; class operator Implicit(const Value: TriBool): Boolean; static; inline; class operator Implicit(const Value: TriBool): TriBoolEnum; static; inline; class operator Implicit(const Value: TriBoolEnum): TriBool; static; inline; class operator Equal(const L, R: TriBool): TriBool; static; inline; class operator Equal(const L: Boolean; R: TriBool): TriBool; static; inline; class operator Equal(const L: TriBool; R: Boolean): TriBool; static; inline; class operator LogicalOr(const L, R: TriBool): TriBool; static; inline; class operator LogicalOr(const L: Boolean; R: TriBool): TriBool; static; inline; class operator LogicalOr(const L: TriBool; R: Boolean): TriBool; static; inline; ... I want something like this: TriBool = (Unknown, ExactFalse, ExactTrue); TriBoolHelper = record helper for TriBool class operator ... It compiles, but overloading doesn't work. Thanks in advance.