I'm wondering if it's possible to append members to a C++ union in a subclass.
class A {
...
union { int a; int b; };
};
class B : public A {
...
int c; //<- Can this use the same storage as the union?
};
A more concrete example would be the idea of a tagged union, where you'd like to have a subclass that adds a type to the union.
You said,
I'm wondering if it's possible to append members to a C++ union in a subclass.
The language does not allow extending a union
. Appending members to a union
is not possible.
What's worse, unlike class
es and struct
s, which can be extended by creating sub-classes(structs), union
s cannot have base classes. They may not be used as base classes either.
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