text: static bool eigen_did_assert = false;
  #define eigen_assert(X) if(!eigen_did_assert && !(X)){ std::cout << "### Assertion raised in " << __FILE__ << ":" << __LINE__ << ":\n" #X << "\n### The following would happen without assertions:\n"; eigen_did_assert = true;}
  
  #include <iostream>
  #include <Eigen/Eigen>
  
  #ifndef M_PI
  #define M_PI 3.1415926535897932384626433832795
  #endif
  
  
  using namespace Eigen;
  using namespace std;
  
  int main(int, char**)
  {
    cout.precision(3);
  // intentionally remove indentation of snippet
  {
  ArrayXd v = ArrayXd::LinSpaced(7,-2,2);
  cout << v << endl << endl;
  cout << round(v) << endl;
  
  }
    return 0;
  }
  