class Vector
{
    vetor<int> p;
    class Range
    {
        int index;
        Range(int i) : index(i) {}
    }
    int& operator[] (int i)
    {
        if (i >= 0 && i < p.size()) return p[i];
        throw Range(i);
    }
}


//////////



try
{
    Vector vector;
    vector[p.size() + 10]// ОШИБКА 100%

}
catch (Vector::Range r)
{
    cout << "FAIL!!! NOT VALID ONDEX";
}