std::is_volatile

// is_volatile example
#include <iostream>
#include <type_traits>

int main() {
  std::cout << std::boolalpha;
  std::cout << "is_volatile:" << std::endl;
  std::cout << "int: " << std::is_volatile<int>::value << std::endl;
  std::cout << "volatile int: " << std::is_volatile<volatile int>::value << std::endl;
  std::cout << "volatile int*: " << std::is_volatile<volatile int*>::value << std::endl;
  std::cout << "int* volatile: " << std::is_volatile<int* volatile>::value << std::endl;
  return 0;
}