Multiple Inheritance and Casting

[Eggman002]

I have a circumstance where multiple inheritance is required. I have a class layout something like the following.

class Mode
{

}

class ModeType1 : Mode
{
}

class ModeType2 : Mode
{
}

class SpecialModeCommon
{
}


class SpecialModeType1 : ModeType1, SpecialModeCommon
{
}

class SpecialModeType2 : ModeType2, SpecialModeCommon
{
}

class ModeManager
{
  static Mode* GetMode();
}

Now, I need to use GetMode() to access the mode but I need to cast it to SpecialModeCommon in order to access some of the special methods/objects. At the point where I am doing this I can be sure that the Mode is also of type SpecialModeCommon.

The following will not compile since SpecialModeCommon does not extend Mode.

SpecialModeCommon* mode = static_cast<SpecialModeCommon*>(ModeManager::GetMode());

I can do a C style cast to get it to compile but that results in data being written to odd places and things not working.

For some reason not understood by me, dynamic_cast does not work in the environment I am working in. I don't understand why but assume I don't have dynamic_cast available (would that even solve this problem?)

Any assistance would be appreciated.