| 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 | 
 | { | 
 | ${snippet_source_code} | 
 | } | 
 |   return 0; | 
 | } |