0-1-8. Exception: empty interface function.

[Alex-R]

0-1-8:
The following are examples of external side effects:
• Reading or writing to a ile, stream, etc.;
• Changing the value of a non local variable;
• Changing the value of an argument having reference type;
• Using a volatile object;
• Raising an exception.


Situation:
There is some mouse interface: OnMouseUp, OnMouseDone, OnMouseMove... or some other manipulator interface... does not matter...
There are some objects that use this interface but not all objects need all functions, so it is possible:
void SomeObject::OnMouseMove ( uint32 x, uint32 y)
{
//do nothing
}