Re: Structures not behaving as value types

Richard Kucia wrote:
> I have a VB.Net declaration of a structure strFieldMask. The intended
> purpose is to store a bunch of bits, like a bit vector. The structure also
> has operator declarations for =, <>, And, Or, Not and <<, plus some other
> methods for bit manipulation.
>
> The problem is that variables of type strFieldMask seem to behave as
> though there was a singleton strFieldMask and all instances shared it.
>
> Consider this:
>
> Dim Mask1 as strFieldMask
> Dim Mask2 as strFieldMask
>
> Mask1 = (formula for computing the next unused mask value)
> Debug.WriteLine(Mask1.ToString))
> Mask2 = (same formula)
> Debug.WriteLine(Mask1.ToString)) ' Yes, Mask1, not Mask2
>
> The result from the first WriteLine might be "0x10" and the result from
> the second WriteLine might be "0x20".
>
> I've successfully used structures before, but this is the first time I've
> tried overloading the operators. Has that caused the behavior I'm seeing?

It's hard to say without seeing the code - could you post a short but
complete example?

Jon

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