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<h1 class="topictitle1">Access</h1>
<div>
<div class="section">
<div class="Note"><h3 class="NoteTipHead">
Caution</h3>
<p>The methods described in this section may be
concurrently invoked on the same vector as methods for concurrent growth.
However, the returned reference may be to an element that is being concurrently
constructed.
</p>
</div>
<div class="tablenoborder"><table cellpadding="4" summary="" frame="border" border="1" cellspacing="0" rules="all"><span class="tabledesc">The following table provides additional information on the
members of this template class.
</span><thead align="left">
<tr>
<th class="cellrowborder" valign="top" width="33.89830508474576%" id="d55360e42">Member
</th>
<th class="cellrowborder" valign="top" width="66.10169491525423%" id="d55360e45">Description
</th>
</tr>
</thead>
<tbody>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d55360e42 "><span class="keyword">reference operator[]( size_type
index )</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d55360e45 ">
<p><strong>Returns</strong>: Reference to element with
the specified index.
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d55360e42 "><span class="keyword"> const_refrence operator[](
size_type index ) const</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d55360e45 ">
<p><strong>Returns</strong>: Const reference to
element with the specified index.
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d55360e42 "><span class="keyword">reference at( size_type index
)</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d55360e45 ">
<p><strong>Returns</strong>: Reference to element at
specified index.
</p>
<p><strong>Throws</strong> :
<samp class="codeph">std::out_of_range
</samp>if
<samp class="codeph">index >= size()</samp>.
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d55360e42 "><span class="keyword"> const_reference at( size_type
index ) const</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d55360e45 ">
<p><strong>Returns</strong>: Const reference to
element at specified index.
</p>
<p><strong>Throws</strong>:
<samp class="codeph">std::out_of_range</samp> if
<samp class="codeph">index >= size()</samp> or
<samp class="codeph">index</samp> is for broken portion of vector.
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d55360e42 "><span class="keyword"> reference front()</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d55360e45 ">
<p><strong>Returns</strong>:
<samp class="codeph">(*this)[0]</samp>
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d55360e42 "><span class="keyword"> const_reference front()
const</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d55360e45 ">
<p><strong>Returns</strong>:
<samp class="codeph">(*this)[0]</samp>
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d55360e42 "><span class="keyword"> reference back()</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d55360e45 ">
<p><strong>Returns</strong>:
<samp class="codeph">(*this)[size()-1]</samp>
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d55360e42 "><span class="keyword">const_reference back()
const</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d55360e45 ">
<p><strong>Returns</strong>:
<samp class="codeph">(*this)[size()-1]</samp>
</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="../../../reference/containers_overview/concurrent_vector.htm">concurrent_vector</a></div>
</div>
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