Re: slightly interresting derrived class problem
easy wrote:
I start off with an interface class that has no data members and a
handful of virtual functions.
First Question: is that allowed ?
Uh... Yes. Does your compiler tell you something you don't believe
it should?
I then derived from this class and it gets included into a couple of
other classes that need that interface. The derived class had a
number of data members including a struct that allow it to do its
dirty work.
OK...
When I directly access any data members (through pointers or through
public data members) in the derrived class hilarity ensues. I found
that the value returned is offset by 4 bytes( 32bits ).
for example, if I wanted:
class1.public_struct.int0
I would get
class1.public_struct.int1
That's bizarre.
more curiously this problem would only show up when i ran the release
version of the code. The debug version behaved correctly.
That sounds like an error in the compiler...
After an entire wasted morning I added an unused data member to the
very first interface class and all problems dissapeared like a fart in
the wind.
Main Question: Is this a compiler error or did I violate the standard?
To be able to tell you for sure, we'd need to see the code.
V
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