Reference to an unnamed temporary object (life time)

Question

After reading this answer from ildjarn, I wrote the following example, and it looks like an unnamed temporary object has the same life time as its reference!

• H

Answer 1

Lightness Races in Orbit is right. And I think this example would be more concise.

#include   //cout
#include 

int main ()
{
    using namespace std;
    int a = 123;
    int b = 123;
//  int       & a_b = a + b; // error!
    int const & a_b = a + b;
    cout<<"hello world!"<