39   Scalar* data_;  // not owned.
43   MatrixMap() : data_(nullptr), rows_(0), cols_(0), stride_(0) {}  in MatrixMap()
45       : data_(data), rows_(rows), cols_(cols), stride_(stride) {}  in MatrixMap()
47       : data_(other.data_),  in MatrixMap()
57   Scalar* data() const { return data_; }  in data()
59     return data_ + row * rows_stride() + col * cols_stride();  in data()
86   Scalar* data_;  // not owned.
90   VectorMap() : data_(nullptr), size_(0) {}  in VectorMap()
91   VectorMap(Scalar* data, int size) : data_(data), size_(size) {}  in VectorMap()
92   VectorMap(const VectorMap& other) : data_(other.data_), size_(other.size_) {}  in VectorMap()
95   Scalar* data() const { return data_; }  in data()
96   Scalar* data(int index) const { return data_ + index; }  in data()
108   Scalar data_;
112   VectorDup() : data_(0), size_(0) {}  in VectorDup()
113   VectorDup(Scalar data, int size) : data_(data), size_(size) {}  in VectorDup()
114   VectorDup(const VectorDup& other) : data_(other.data_), size_(other.size_) {}  in VectorDup()
117   Scalar& operator()(int index) const { return data_; }  in operator()