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15 lines
231 B
C++

#include "../Eigen/Core"
using namespace Eigen;
#ifdef EIGEN_SHOULD_FAIL_TO_BUILD
void call_ref(Ref<VectorXf> a) {}
#else
void call_ref(const Ref<const VectorXf> &a) {}
#endif
int main() {
VectorXf a(10);
call_ref(a + a);
}