C++ keyword: xor_eq

#include <bitset>
#include <iostream>
 
using bin = std::bitset<8>;
 
void show(bin z, const char* s, int n)
{
    if (n == 0) std::cout << "┌────────────┬──────────┐\n";
    if (n <= 2) std::cout << "│ " <<s<<  " │ " <<z<<" │\n";
    if (n == 2) std::cout << "└────────────┴──────────┘\n";
}
 
int main()
{
    bin x{"01011010"}; show(x, "x         ", 0);
    bin y{"00111100"}; show(y, "y         ", 1);
    x xor_eq y;        show(x, "x xor_eq y", 2);
}