std::remove_extent

// remove_extent
#include <iostream>
#include <type_traits>
int main() {
  typedef std::remove_extent<int>::type A;                // int
  typedef std::remove_extent<int[24]>::type B;            // int
  typedef std::remove_extent<int[24][60]>::type C;        // int[60]
  typedef std::remove_extent<int[][60]>::type D;          // int[60]
  std::cout << std::boolalpha;
  std::cout << "typedefs of int:" << std::endl;
  std::cout << "A: " << std::is_same<int,A>::value << std::endl;
  std::cout << "B: " << std::is_same<int,B>::value << std::endl;
  std::cout << "C: " << std::is_same<int,C>::value << std::endl;
  std::cout << "D: " << std::is_same<int,D>::value << std::endl;
  return 0;
}