example6_prvalues_vs_glvalues.cpp

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
#include <iostream>

int main() {
    int a = 10;          // 'a' is an lvalue
    int b = a + 20;      // 'a + 20' is a prvalue

    int&& r = a + 30;    // 'a + 30' is a prvalue, but 'r' is an xvalue

    std::cout << "r: " << r << std::endl;

    return 0;
}