1 #include "../Eigen/Core" 2 3 #ifdef EIGEN_SHOULD_FAIL_TO_BUILD 4 #define ROWS Dynamic 5 #else 6 #define ROWS 3 7 #endif 8 9 using namespace Eigen; 10 main()11 int main() 12 { 13 Matrix<int, ROWS, 1> {1, 2, 3}; 14 } 15