| // PR c++/71875 |
| // { dg-do link { target c++14 } } |
| |
| template <typename T> |
| constexpr bool IsMatrix = false; |
| |
| template<typename TElem> |
| class Matrix {}; |
| |
| template <typename TElem> |
| constexpr bool IsMatrix<Matrix<TElem>> = true; |
| |
| template<typename TNestVec> |
| class RowVecExpMatrix; |
| |
| template <typename TNestVec> |
| constexpr bool IsMatrix<RowVecExpMatrix<TNestVec>> = true; |
| |
| int |
| main () |
| { |
| static_assert (IsMatrix<RowVecExpMatrix<Matrix<int>>>, "Matrix check error"); |
| static_assert (IsMatrix<Matrix<int>>, "Input type is not a matrix"); |
| } |
