1 #include "../Eigen/Core" 2 3 #ifdef EIGEN_SHOULD_FAIL_TO_BUILD 4 #define CV_QUALIFIER const 5 #else 6 #define CV_QUALIFIER 7 #endif 8 9 using namespace Eigen; 10 11 void foo(float *ptr){ 12 Map<CV_QUALIFIER Vector3f>(ptr).coeffRef(0) = 1.0f; 13 } 14 15 int main() {} 16