+
+ template<typename T, typename TOUT>
+ class UMeshGenIterator : public std::iterator< std::input_iterator_tag, const TOUT *, mcIdType, const TOUT **, const TOUT *>
+ {
+ std::size_t _num = 0;
+ std::vector<const MEDCouplingUMesh *> *_data = nullptr;
+ using my_reference = typename std::iterator< std::input_iterator_tag, const TOUT *, mcIdType, const TOUT **, const TOUT *>::reference;
+ public:
+ explicit UMeshGenIterator(std::size_t num , std::vector<const MEDCouplingUMesh *> *data) : _num(num),_data(data) {}
+ UMeshGenIterator<T,TOUT>& operator++() { ++_num; return *this; }
+ bool operator==(const UMeshGenIterator& other) const { return _num == other._num; }
+ bool operator!=(const UMeshGenIterator& other) const { return !(*this == other); }
+ my_reference operator*() const { T tt; return tt((*_data)[_num]); }
+ };
+
+ struct UMeshIndexConnectivityFunctor { const DataArrayIdType *operator()(const MEDCouplingUMesh *um) { return um->getNodalConnectivityIndex(); } };
+
+ using UMeshConnectivityIndexIterator = UMeshGenIterator<UMeshIndexConnectivityFunctor,DataArrayIdType>;
+
+ struct UMeshConnectivityFunctor { const DataArrayIdType *operator()(const MEDCouplingUMesh *um) { return um->getNodalConnectivity(); } };
+
+ using UMeshConnectivityIterator = UMeshGenIterator<UMeshConnectivityFunctor,DataArrayIdType>;
+
+ struct UMeshCoordsFunctor { const DataArrayDouble *operator()(const MEDCouplingUMesh *um) { return um->getCoords(); } };
+
+ using UMeshCoordsIterator = UMeshGenIterator<UMeshCoordsFunctor,DataArrayDouble>;