Can a member of a class be named the same name as its type (another class)?

Question

Trying to compile the following code on different compilers gives me two different results:

struct S{};
struct T{S S;};
int main(){}

As you

Answer 1

@JesseGood provide a complete answer, but if you really want to do this without any error, you can use type's full name and it will work as follow:

struct S {};
struct T { ::S S; };
int main() {return 0;}

No there is no error, since S in your class is T::S and its type is ::S!