Union of same type in C++

Question

Whenever I see examples of union, they are always different types. For example, from MSDN:

// declaring_a_union.cpp
union DATATYPE    // Declare union type
{         


        

Answer 1

No, this won't cause any issues. The reason you don't see it more often is that it's pointless - both names refer to the same value of the same type.