namespace std {
class slice {
public:
slice();
slice(size_t, size_t, size_t);
size_t start() const;
size_t size() const;
size_t stride() const;
};
}
The slice class represents a BLAS-like slice from an array. Such a slice is specified by a starting index, a length, and a stride.288
BLAS stands for Basic Linear Algebra Subprograms. C++ programs may instantiate this class. See, for example, Dongarra, Du Croz, Duff, and Hammerling: A set of Level 3 Basic Linear Algebra Subprograms; Technical Report MCS-P1-0888, Argonne National Laboratory (USA), Mathematics and Computer Science Division, August, 1988.
slice();
slice(size_t start, size_t length, size_t stride);
slice(const slice&);
The default constructor is equivalent to slice(0, 0, 0). A default constructor is provided only to permit the declaration of arrays of slices. The constructor with arguments for a slice takes a start, length, and stride parameter.
[ Example: slice(3, 8, 2) constructs a slice which selects elements 3, 5, 7, ... 17 from an array. — end example ]
size_t start() const;
size_t size() const;
size_t stride() const;
Returns: The start, length, or stride specified by a slice object.
Complexity: constant time.