#define TRIQS_ARRAYS_ENFORCE_BOUNDCHECK
#include <triqs/arrays.hpp>
using triqs::arrays::array;
int main() {
 try {
  array<double, 2> A(2, 2);
  A() = 3;
  std::cout << A(0, 3) << std::endl;
 }
 // catch (triqs::arrays::key_error & e) { std::cout<< e.what()<< std::endl;}
 catch (std::exception& e) {
  std::cout << e.what() << std::endl;
 } // or like this : triqs::arrays::key_error derives from std::exception
}