| #include "../Eigen/Core" |
| |
| // Reproduces the "storage-order footgun" on !2336: get<I>() uses coeffRef(Index), |
| // which is linear in storage order, so a RowMajor matrix would silently flip |
| // decomposition order vs. the column-major default. We static_assert against |
| // RowMajor until the semantics are agreed upon — this failtest guards that. |
| #ifdef EIGEN_SHOULD_FAIL_TO_BUILD |
| #define STORAGE_ORDER Eigen::RowMajor |
| #else |
| #define STORAGE_ORDER Eigen::ColMajor |
| #endif |
| |
| int main() { |
| Eigen::Matrix<double, 2, 2, STORAGE_ORDER> m; |
| m << 1, 2, 3, 4; |
| (void)Eigen::get<0>(m); |
| return 0; // Test should pass. |
| } |
