ad.ministrator
New member
- Joined
- Dec 21, 2009
- Messages
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- Programming Experience
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I have a base class B and serveral derived classes D1, D2, D3 etc.
I created a template class T like this:
Public Class T(Of X)
Public Function GetDerived(Byref Base As B) as X
Return CType(Base, X)
End Function
End Class
I use the template class with D1 or D2 or, any other derived class of B, as X
I get an error because the computer doesn't know that X is derived from B: D1 or D2 or D3 or D4.
In C++ this is allowed. What do I have to do? I suppose the Type as parameter of CType cant be a template parameter. Am I right?
I created a template class T like this:
Public Class T(Of X)
Public Function GetDerived(Byref Base As B) as X
Return CType(Base, X)
End Function
End Class
I use the template class with D1 or D2 or, any other derived class of B, as X
I get an error because the computer doesn't know that X is derived from B: D1 or D2 or D3 or D4.
In C++ this is allowed. What do I have to do? I suppose the Type as parameter of CType cant be a template parameter. Am I right?
