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
9using namespace Eigen;
10
11void foo(float *ptr){
12    Map<CV_QUALIFIER MatrixXf>(ptr, 1, 1).coeffRef(0,0) = 1.0f;
13}
14
15int main() {}
16