1 #include "../Eigen/Core" 2 3 #ifdef EIGEN_SHOULD_FAIL_TO_BUILD 4 #define ROWS Dynamic 5 #define COLS Dynamic 6 #else 7 #define ROWS 3 8 #define COLS 1 9 #endif 10 11 using namespace Eigen; 12 main()13 int main() 14 { 15 Matrix<int, ROWS, COLS> {1, 2, 3}; 16 } 17