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- <h1><img src="../../../../boost.png" align="middle" />Range and Slice Storage</h1>
- <div class="toc" id="toc"></div>
- <h2><a name="range"></a>Range<SizeType,DistanceType></h2>
- <h4>Description</h4>
- <p>The class <code>range</code> specifies a range of indicies. The range is a sequence of indices
- from a start value to stop value. The indices increase by one and exlude the stop value.
- <code>range</code> can therefore be used to specify ranges of elements from vectors and matrices.</p>
- <h4>Example</h4>
- <pre>
- #include <boost/numeric/ublas/storage.hpp>
- int main () {
- using namespace boost::numeric::ublas;
- range r (0, 3);
- for (unsigned i = 0; i < r.size (); ++ i) {
- std::cout << r (i) << std::endl;
- }
- }
- </pre>
- <h4>Definition</h4>
- <p>Defined in the header storage.hpp.</p>
- <h4>Model of</h4>
- <p>Reversible Container.</p>
- <h4>Type requirements</h4>
- <p>None, except for those imposed by the requirements of Reversible
- Container.</p>
- <h4>Public base classes</h4>
- <p>None.</p>
- <h4>Members</h4>
- <table border="1" summary="members">
- <tbody>
- <tr>
- <th>Member</th>
- <th>Description</th>
- </tr>
- <tr>
- <td><code>range (size_type start, size_type stop)</code></td>
- <td>Constructs a range of indicies from <code>start</code> to <code>stop (excluded)</code>
- .</td>
- </tr>
- <tr>
- <td><code>size_type start () const</code></td>
- <td>Returns the beginning of the <code>range</code>.</td>
- </tr>
- <tr>
- <td><code>size_type size () const</code></td>
- <td>Returns the size of the <code>range</code>.</td>
- </tr>
- <tr>
- <td><code>const_reference operator [] (size_type i)
- const</code></td>
- <td>Returns the value <code>start + i</code> of the <code>i</code>
- -th element.</td>
- </tr>
- <tr>
- <td><code>range compose (const range &r) const</code></td>
- <td>Returns the composite range from <code>start + r.start
- ()</code> to <code>start + r.start () + r.size ()</code>.</td>
- </tr>
- <tr>
- <td><code>bool operator == (const range &r) const</code></td>
- <td>Tests two ranges for equality.</td>
- </tr>
- <tr>
- <td><code>bool operator != (const range &r) const</code></td>
- <td>Tests two ranges for inequality.</td>
- </tr>
- <tr>
- <td><code>const_iterator begin () const</code></td>
- <td>Returns a <code>const_iterator</code> pointing to the beginning
- of the <code>range</code>.</td>
- </tr>
- <tr>
- <td><code>const_iterator end () const</code></td>
- <td>Returns a <code>const_iterator</code> pointing to the end of
- the <code>range</code>.</td>
- </tr>
- <tr>
- <td><code>const_reverse_iterator rbegin () const</code></td>
- <td>Returns a <code>const_reverse_iterator</code> pointing to the
- beginning of the reversed <code>range</code>.</td>
- </tr>
- <tr>
- <td><code>const_reverse_iterator rend () const</code></td>
- <td>Returns a <code>const_reverse_iterator</code> pointing to the
- end of the reversed <code>range</code>.</td>
- </tr>
- </tbody>
- </table>
- <h4>Preconditions</h4>
- <ul>
- <li><code>start () <= stop ()</code></li>
- </ul>
- <h2><a name="slice"></a>Slice<SizeType,DistanceType></h2>
- <h4>Description</h4>
- <p>The class <code>slice</code> specifies a 'slice' of indicies. Slices are more general
- then ranges, the stride allows the sequence of indicies to increase and decrease by the specified amount between element.
- <code>slice</code> can therefore be used to specify slices of element from vectors and matrices.</p>
- <h4>Example</h4>
- <pre>
- #include <boost/numeric/ublas/storage.hpp>
- int main () {
- using namespace boost::numeric::ublas;
- slice s (0, 1, 3);
- for (unsigned i = 0; i < s.size (); ++ i) {
- std::cout << s (i) << std::endl;
- }
- }
- </pre>
- <h4>Definition</h4>
- <p>Defined in the header storage.hpp.</p>
- <h4>Model of</h4>
- <p>Reversible Container.</p>
- <h4>Type requirements</h4>
- <p>None, except for those imposed by the requirements of Reversible
- Container.</p>
- <h4>Public base classes</h4>
- <p>None.</p>
- <h4>Members</h4>
- <table border="1" summary="members">
- <tbody>
- <tr>
- <th>Member</th>
- <th>Description</th>
- </tr>
- <tr>
- <td><code>slice (size_type start, size_type stride, size_type
- size)</code></td>
- <td>Constructs a slice <code>start,start+stride,start+2*stride...</code> with
- <code>size</code> elements.</td>
- </tr>
- <tr>
- <td><code>size_type start () const</code></td>
- <td>Returns the beginning of the <code>slice</code>.</td>
- </tr>
- <tr>
- <td><code>size_type stride () const</code></td>
- <td>Returns the stride of the <code>slice</code>.</td>
- </tr>
- <tr>
- <td><code>size_type size () const</code></td>
- <td>Returns the size of the <code>slice</code>.</td>
- </tr>
- <tr>
- <td><code>const_reference operator [] (size_type i)
- const</code></td>
- <td>Returns the value <code>start + i * stride</code> of the
- <code>i</code>-th element.</td>
- </tr>
- <tr>
- <td><code>slice compose (const range &r) const</code></td>
- <td>Returns the composite slice from <code>start + stride * r.start
- ()</code> to <code>start + stride * (r.start () + r.size ())</code>
- with stride <code>stride</code>.</td>
- </tr>
- <tr>
- <td><code>slice compose (const slice &s) const</code></td>
- <td>Returns the composite slice from <code>start + stride * s.start
- ()</code> to <code>start + stride * s.stride () * (s.start () +
- s.size ())</code> with stride <code>stride * s.stride ()</code>
- .</td>
- </tr>
- <tr>
- <td><code>bool operator == (const slice &s) const</code></td>
- <td>Tests two slices for equality.</td>
- </tr>
- <tr>
- <td><code>bool operator != (const slice &s) const</code></td>
- <td>Tests two slices for inequality.</td>
- </tr>
- <tr>
- <td><code>const_iterator begin () const</code></td>
- <td>Returns a <code>const_iterator</code> pointing to the beginning
- of the <code>slice</code>.</td>
- </tr>
- <tr>
- <td><code>const_iterator end () const</code></td>
- <td>Returns a <code>const_iterator</code> pointing to the end of
- the <code>slice</code>.</td>
- </tr>
- <tr>
- <td><code>const_reverse_iterator rbegin () const</code></td>
- <td>Returns a <code>const_reverse_iterator</code> pointing to the
- beginning of the reversed <code>slice</code>.</td>
- </tr>
- <tr>
- <td><code>const_reverse_iterator rend () const</code></td>
- <td>Returns a <code>const_reverse_iterator</code> pointing to the
- end of the reversed <code>slice</code>.</td>
- </tr>
- </tbody>
- </table>
- <h4>Preconditions</h4>
- <ul>
- <li>None all strides are vaild. However when an index is returned or an iterator is dereferenced its
- value must be representable as the size_type.</li>
- </ul>
- <hr/>
- <p>
- Copyright (©) 2000-2004 Michael Stevens, Mathias Koch,
- Joerg Walter, Gunter Winkler<br />
- Use, modification and distribution are subject to the
- Boost Software License, Version 1.0.
- (See accompanying file LICENSE_1_0.txt
- or copy at <a href="http://www.boost.org/LICENSE_1_0.txt">
- http://www.boost.org/LICENSE_1_0.txt
- </a>).
- </p>
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