How C++ reference works

Question

After working 15 years in C++ I found that I don\'t understand references completely...

class TestClass
{
public:
    TestClass() : m_nData(0)
    {
    }

    T         


        

Answer 1

TestClass& c = TestClass(); // TestClass() temporary doesn't persist beyond this expression.
c.Dump();

TestClass() creates a temporary and you cannot take the reference of it.

const TestClass& c = TestClass();

const qualification extends the life time of the temporary being created until the scope of the object c.