std::is_compound

template<class T>
struct is_compound : std::integral_constant <bool,!is_fundamental<T>::value> {};

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

int main() {
  std::cout << std::boolalpha;
  std::cout << "is_compound:" << std::endl;
  std::cout << "long int: " << std::is_compound<long int>::value << std::endl;
  std::cout << "float: " << std::is_compound<float>::value << std::endl;
  std::cout << "float*: " << std::is_compound<float*>::value << std::endl;
  std::cout << "float&: " << std::is_compound<float&>::value << std::endl;
  std::cout << "decltype(nullptr): " << std::is_compound<decltype(nullptr)>::value << std::endl;
  return 0;
}