ref_5.cpp 238 Bytes

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#include "../Eigen/Core"
using namespace Eigen;

void call_ref(Ref<VectorXf> a) { }

int main()
{
  VectorXf a(10);
  DenseBase<VectorXf> &ac(a);
#ifdef EIGEN_SHOULD_FAIL_TO_BUILD
  call_ref(ac);
#else
  call_ref(ac.derived());
#endif
}