220 lines
10 KiB
HTML
220 lines
10 KiB
HTML
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<title>Unbounded array</title>
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<body>
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<h1><img src="../../../../boost.png" align="middle" />Unbounded Array Storage</h1>
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<div class="toc" id="toc"></div>
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<h2><a name="unbounded_array"></a>Unbounded Array</h2>
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<h4>Description</h4>
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<p>The templated class <code>unbounded_array<T, ALLOC></code> implements a unbounded storage array using an allocator.
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The unbounded array is similar to a <code>std::vector</code> in that in can grow in size beyond any fixed bound.
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However <code>unbounded_array</code> is aimed at optimal performance. Therefore <code>unbounded_array</code> does not model a
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<code>Sequence</code> like <code>std::vector</code> does.
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<p>When resized <code>unbounded_array</code> will reallocate it's storage even if the new size requirement is smaller. It is therefore inefficient to resize a <code>unbounded_array</code></p>
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<h4>Example</h4>
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<pre>
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#include <boost/numeric/ublas/storage.hpp>
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int main () {
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using namespace boost::numeric::ublas;
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unbounded_array<double> a (3);
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for (unsigned i = 0; i < a.size (); ++ i) {
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a [i] = i;
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std::cout << a [i] << std::endl;
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}
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}
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</pre>
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<h4>Definition</h4>
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<p>Defined in the header storage.hpp.</p>
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<h4>Template parameters</h4>
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<table border="1" summary="parameters">
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<tbody>
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<tr>
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<th>Parameter</th>
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<th>Description</th>
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<th>Default</th>
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</tr>
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<tr>
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<td><code>T</code></td>
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<td>The type of object stored in the array.</td>
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<td></td>
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</tr>
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<tr>
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<td><code>ALLOC</code></td>
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<td>An STL Allocator</td>
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<td>std::allocator</td>
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</tr>
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</tbody>
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</table>
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<h4>Model of</h4>
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<p><a href="storage_concept.html">Storage</a></p>
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<h4>Type requirements</h4>
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<p>None, except for those imposed by the requirements of Storage.</p>
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<h4>Public base classes</h4>
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<p>None.</p>
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<h4>Members</h4>
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<ul>
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<li>The description does not describe what the member actually does, this can be looked up
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in the corresponding concept documentation, but instead contains a remark on the implementation of the
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member inside this model of the concept.</li>
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<li>Typography:
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<ul>
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<li>Members that are not part of the implemented concepts are <font color="blue">in blue</font>.</li>
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</ul>
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</li>
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</ul>
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<table border="1" summary="members">
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<tbody>
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<tr>
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<th>Member</th>
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<th>Where defined</th>
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<th>Description</th>
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</tr>
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<tr><td><code>value_type</code></td><td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td><td></tr>
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<tr><td><code>pointer</code></td><td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td><td>Defined as <code>value_type*</code></td></tr>
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<tr><td><code>const_pointer</code></td><td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td><td>Defined as <code>const value_type*</code></td></tr>
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<tr><td><code>reference</code></td><td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td><td>Defined as <code>value_type&</code></td></tr>
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<tr><td><code>const_reference</code></td><td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td><td>Defined as <code>const value_type&</code></td></tr>
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<tr><td><code>size_type</code></td><td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td><td>Defined as <code>Alloc::size_type</code></td></tr>
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<tr><td><code>difference_type</code></td><td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td><td>Defined as <code>Alloc::difference_type</code></td></tr>
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<tr><td><code>iterator</code></td><td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td><td>Defined as <code>pointer</code></td></tr>
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<tr><td><code>const_iterator</code></td><td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td><td>Defined as <code>const_pointer</code></td></tr>
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<tr><td><code>revere_iterator</code></td><td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td><td>Defined as <code>std::reverse_iterator<iterator></code></td></tr>
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<tr><td><code>const_revere_iterator</code></td><td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td><td>Defined as <code>std::reverse_iterator<const_iterator></code></td></tr>
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<tr><td><font color="blue">allocator_type</font></td><td></td><td>Defined as ALLOC</td></tr>
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<tr>
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<td><code><em>explicit</em> unbounded_array (<em>ALLOC &a = ALLOC()</em>)</code></td>
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<td><a href="storage_concept.html">Storage</a></td>
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<td>Creates an <code>unbounded_array</code> that holds zero elements, using a specified allocator.</td>
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</tr>
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<tr>
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<td><code><em>explicit</em> unbounded_array (size_type size<em>, ALLOC &a = ALLOC()</em>)</code></td>
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<td><a href="storage_concept.html">Storage</a></td>
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<td>Creates a uninitialized <code>unbounded_array</code> that holds <code>size</code> elements, using a specified allocator. All the elements are default constructed.</td>
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</tr>
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<tr>
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<td><code>unbounded_array (size_type size, const T& init<em>, ALLOC& a = ALLOC()</em>)</code></td>
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<td><a href="storage_concept.html">Storage</a></td>
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<td>Creates an initialized <code>unbounded_array</code> that holds <code>size</code> elements, using a specified allocator. All the elements are constructed from the <code>init</code> value.</td>
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</tr>
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<tr>
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<td><code>unbounded_array (const unbounded_array &a)</code></td>
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<td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td>
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<td>The copy constructor.</td>
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</tr>
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<tr>
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<td><code>~unbounded_array ()</code></td>
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<td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td>
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<td>Deallocates the <code>unbounded_array</code> itself.</td>
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</tr>
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<tr>
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<td><code>void resize (size_type n)</code></td>
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<td><a href="storage_concept.html">Storage</a></td>
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<td>Reallocates an <code>unbounded_array</code> to hold <code>n</code> elements. Values are uninitialised.</td>
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</tr>
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<tr>
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<td><code>void resize(size_type n, const T& t)</code></td>
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<td><a href="storage_concept.html">Storage</a></td>
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<td>Reallocates an <code>unbounded_array</code> to hold <code>n</code> elements. Values are copies of <code>t</code>
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</tr>
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<tr>
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<td><code>size_type size () const</code></td>
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<td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td>
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<td>Returns the size of the <code>unbounded_array</code>.</td>
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</tr>
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<tr>
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<td><code>const_reference operator [] (size_type i) const</code></td>
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<td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td>
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<td>Returns a <code>const</code> reference of the <code>i</code> -th element.</td>
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</tr>
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<tr>
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<td><code>reference operator [] (size_type i)</code></td>
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<td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td>
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<td>Returns a reference of the <code>i</code>-th element.</td>
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</tr>
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<tr>
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<td><code>unbounded_array &operator = (const unbounded_array &a)</code></td>
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<td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td>
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<td>The assignment operator.</td>
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</tr>
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<tr>
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<td><font color="blue"><code>unbounded_array &assign_temporary (unbounded_array &a)</code></font></td>
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<td></td>
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<td>Assigns a temporary. May change the array <code>a</code>.</td>
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</tr>
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<tr>
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<td><code>void swap (unbounded_array &a)</code></td>
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<td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td>
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<td>Swaps the contents of the arrays.</td>
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</tr>
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<tr>
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<td><code>const_iterator begin () const</code></td>
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<td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td>
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<td>Returns a <code>const_iterator</code> pointing to the beginning
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of the <code>unbounded_array</code>.</td>
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</tr>
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<tr>
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<td><code>const_iterator end () const</code></td>
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<td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td>
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<td>Returns a <code>const_iterator</code> pointing to the end of
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the <code>unbounded_array</code>.</td>
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</tr>
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<tr>
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<td><code>iterator begin ()</code></td>
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<td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td>
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<td>Returns a <code>iterator</code> pointing to the beginning of
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the <code>unbounded_array</code>.</td>
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</tr>
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<tr>
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<td><code>iterator end ()</code></td>
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<td><a href="http://www.sgi.com/tech/stl/Container.html">Container</a></td>
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<td>Returns a <code>iterator</code> pointing to the end of the
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<code>unbounded_array</code>.</td>
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</tr>
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<tr>
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<td><code>const_reverse_iterator rbegin () const</code></td>
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<td><a href="http://www.sgi.com/tech/stl/ReversibleContainer.html">Reversible Container</a></td>
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<td>Returns a <code>const_reverse_iterator</code> pointing to the beginning of the reversed <code>unbounded_array</code>.</td>
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</tr>
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<tr>
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<td><code>const_reverse_iterator rend () const</code></td>
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<td><a href="http://www.sgi.com/tech/stl/ReversibleContainer.html">Reversible Container</a></td>
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<td>Returns a <code>const_reverse_iterator</code> pointing to the end of the reversed <code>unbounded_array</code>.</td>
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</tr>
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<tr>
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<td><code>reverse_iterator rbegin ()</code></td>
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<td><a href="http://www.sgi.com/tech/stl/ReversibleContainer.html">Reversible Container</a></td>
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<td>Returns a <code>reverse_iterator</code> pointing to the beginning of the reversed <code>unbounded_array</code>.</td>
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</tr>
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<tr>
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<td><code>reverse_iterator rend ()</code></td>
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<td><a href="http://www.sgi.com/tech/stl/ReversibleContainer.html">Reversible Container</a></td>
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<td>Returns a <code>reverse_iterator</code> pointing to the end of the reversed <code>unbounded_array</code>.</td>
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</tr>
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</tbody>
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</table>
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<hr />
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<p>Copyright (©) 2000-2002 Joerg Walter, Mathias Koch<br />
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Use, modification and distribution are subject to the
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Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt
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or copy at <a href="http://www.boost.org/LICENSE_1_0.txt">
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http://www.boost.org/LICENSE_1_0.txt
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</a>).
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</p>
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