#define MEMBER_IMPL(selfClass) struct selfClass

MEMBER_IMPL(Invalid)
{
    float testFloat;
    int testInt;
};

struct Valid
{
    float testFloat;
    int testInt;
};

int main()
{
    Invalid i; // Issue 1
    i.testFloat = 9; // Issue 2
    Valid v;
    v.testFloat = 8;
    return 0;
}