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<div class="title">__gnu_cxx::__alloc_traits&lt; _Alloc &gt; Struct Template Reference<div class="ingroups"><a class="el" href="a01431.html">Utilities</a> &raquo; <a class="el" href="a01424.html">Memory</a> &raquo; <a class="el" href="a01443.html">Allocators</a></div></div>  </div>
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Inheritance diagram for __gnu_cxx::__alloc_traits&lt; _Alloc &gt;:</div>
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Public Types</h2></td></tr>
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typedef <a class="el" href="a04085.html">std::allocator_traits</a>&lt; _Alloc &gt;&#160;</td><td class="memItemRight" valign="bottom"><b>_Base_type</b></td></tr>
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typedef _Alloc&#160;</td><td class="memItemRight" valign="bottom"><b>allocator_type</b></td></tr>
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typedef <a class="el" href="a04085.html#a9f5af8cc851146c64ea7a846477c2c46">_Base_type::const_pointer</a>&#160;</td><td class="memItemRight" valign="bottom"><b>const_pointer</b></td></tr>
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typedef const <a class="el" href="a04085.html#aa51dca0f6ab162918c10679e8feb57df">value_type</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>const_reference</b></td></tr>
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typedef <a class="el" href="a04085.html#a3e7a121977c8b44d247526a3f8d655f8">_Base_type::difference_type</a>&#160;</td><td class="memItemRight" valign="bottom"><b>difference_type</b></td></tr>
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typedef <a class="el" href="a04085.html#a8fa48f2bd3c8a0c32836872689b2ca62">_Base_type::pointer</a>&#160;</td><td class="memItemRight" valign="bottom"><b>pointer</b></td></tr>
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template&lt;typename _Tp &gt; </td></tr>
<tr class="memitem:a797b3c598e0d37018cb71b24637c7992"><td class="memTemplItemLeft" align="right" valign="top">using&#160;</td><td class="memTemplItemRight" valign="bottom"><b>rebind_alloc</b> = typename __alloctr_rebind&lt; _Alloc, _Tp &gt;::__type</td></tr>
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template&lt;typename _Tp &gt; </td></tr>
<tr class="memitem:a04a8dd851f0d8effccc0a7c0f2e60f3e"><td class="memTemplItemLeft" align="right" valign="top">using&#160;</td><td class="memTemplItemRight" valign="bottom"><b>rebind_traits</b> = allocator_traits&lt; rebind_alloc&lt; _Tp &gt; &gt;</td></tr>
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typedef <a class="el" href="a04085.html#aa51dca0f6ab162918c10679e8feb57df">value_type</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>reference</b></td></tr>
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typedef <a class="el" href="a04085.html#aba783acc03d73b750b1525250084f104">_Base_type::size_type</a>&#160;</td><td class="memItemRight" valign="bottom"><b>size_type</b></td></tr>
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typedef <a class="el" href="a04085.html#aa51dca0f6ab162918c10679e8feb57df">_Base_type::value_type</a>&#160;</td><td class="memItemRight" valign="bottom"><b>value_type</b></td></tr>
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Static Public Member Functions</h2></td></tr>
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static constexpr bool&#160;</td><td class="memItemRight" valign="bottom"><b>_S_always_equal</b> ()</td></tr>
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static constexpr bool&#160;</td><td class="memItemRight" valign="bottom"><b>_S_nothrow_move</b> ()</td></tr>
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static constexpr bool&#160;</td><td class="memItemRight" valign="bottom"><b>_S_nothrow_swap</b> ()</td></tr>
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static void&#160;</td><td class="memItemRight" valign="bottom"><b>_S_on_swap</b> (_Alloc &amp;__a, _Alloc &amp;__b)</td></tr>
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static constexpr bool&#160;</td><td class="memItemRight" valign="bottom"><b>_S_propagate_on_copy_assign</b> ()</td></tr>
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static constexpr bool&#160;</td><td class="memItemRight" valign="bottom"><b>_S_propagate_on_move_assign</b> ()</td></tr>
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static constexpr bool&#160;</td><td class="memItemRight" valign="bottom"><b>_S_propagate_on_swap</b> ()</td></tr>
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static _Alloc&#160;</td><td class="memItemRight" valign="bottom"><b>_S_select_on_copy</b> (const _Alloc &amp;__a)</td></tr>
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<tr class="memitem:a1afbf725286c9e82ba6166dcc04b10bc"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="a04085.html#a8fa48f2bd3c8a0c32836872689b2ca62">pointer</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a04085.html#a1afbf725286c9e82ba6166dcc04b10bc">allocate</a> (_Alloc &amp;__a, <a class="el" href="a04085.html#aba783acc03d73b750b1525250084f104">size_type</a> __n)</td></tr>
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<tr class="memitem:a79296fdf0f48ef0a49f2d5de6193f867"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="a04085.html#a8fa48f2bd3c8a0c32836872689b2ca62">pointer</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a04085.html#a79296fdf0f48ef0a49f2d5de6193f867">allocate</a> (_Alloc &amp;__a, <a class="el" href="a04085.html#aba783acc03d73b750b1525250084f104">size_type</a> __n, <a class="el" href="a04085.html#ad2eb6f18c8a2ff167bc276f2ca6c89e2">const_void_pointer</a> __hint)</td></tr>
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template&lt;typename _Ptr , typename... _Args&gt; </td></tr>
<tr class="memitem:a4e9c6d6516f9400ecac580f44a2e2302"><td class="memTemplItemLeft" align="right" valign="top">static std::enable_if&lt; __is_custom_pointer&lt; _Ptr &gt;::value &gt;::type&#160;</td><td class="memTemplItemRight" valign="bottom"><b>construct</b> (_Alloc &amp;__a, _Ptr __p, _Args &amp;&amp;... __args)</td></tr>
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<tr class="memitem:aad7d7b8604439d1ecf953a1b9a426e7b"><td class="memTemplParams" colspan="2">template&lt;typename _Tp , typename... _Args&gt; </td></tr>
<tr class="memitem:aad7d7b8604439d1ecf953a1b9a426e7b"><td class="memTemplItemLeft" align="right" valign="top">static auto&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a04085.html#aad7d7b8604439d1ecf953a1b9a426e7b">construct</a> (_Alloc &amp;__a, _Tp *__p, _Args &amp;&amp;... __args) -&gt; decltype(_S_construct(__a, __p, <a class="el" href="a01431.html#gacb5baec338e12b99cb6bddea7506c7c6">std::forward</a>&lt; _Args &gt;(__args)...))</td></tr>
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<tr class="memitem:ae5f6b86b98b17e2ba39243ca8eaf4ee1"><td class="memItemLeft" align="right" valign="top">static void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a04085.html#ae5f6b86b98b17e2ba39243ca8eaf4ee1">deallocate</a> (_Alloc &amp;__a, <a class="el" href="a04085.html#a8fa48f2bd3c8a0c32836872689b2ca62">pointer</a> __p, <a class="el" href="a04085.html#aba783acc03d73b750b1525250084f104">size_type</a> __n)</td></tr>
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template&lt;typename _Ptr &gt; </td></tr>
<tr class="memitem:a2fde4ebddaf68ba0b4dd40150fdf1d65"><td class="memTemplItemLeft" align="right" valign="top">static std::enable_if&lt; __is_custom_pointer&lt; _Ptr &gt;::value &gt;::type&#160;</td><td class="memTemplItemRight" valign="bottom"><b>destroy</b> (_Alloc &amp;__a, _Ptr __p)</td></tr>
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<tr class="memitem:ac73f3d164cf01c9d61b44d42c30db3d3"><td class="memTemplParams" colspan="2">template&lt;typename _Tp &gt; </td></tr>
<tr class="memitem:ac73f3d164cf01c9d61b44d42c30db3d3"><td class="memTemplItemLeft" align="right" valign="top">static void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a04085.html#ac73f3d164cf01c9d61b44d42c30db3d3">destroy</a> (_Alloc &amp;__a, _Tp *__p)</td></tr>
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<tr class="memitem:a29c306bcb6a7676a516430a0e50b990a"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="a04085.html#aba783acc03d73b750b1525250084f104">size_type</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a04085.html#a29c306bcb6a7676a516430a0e50b990a">max_size</a> (const _Alloc &amp;__a) noexcept</td></tr>
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<tr class="memitem:ac324d9065f45f7ae2dd1e0014c73f218"><td class="memItemLeft" align="right" valign="top">static _Alloc&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a04085.html#ac324d9065f45f7ae2dd1e0014c73f218">select_on_container_copy_construction</a> (const _Alloc &amp;__rhs)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template&lt;typename _Alloc&gt;<br />
struct __gnu_cxx::__alloc_traits&lt; _Alloc &gt;</h3>

<p>Uniform interface to C++98 and C++0x allocators. </p>

<p class="definition">Definition at line <a class="el" href="a14749_source.html#l00095">95</a> of file <a class="el" href="a14749_source.html">ext/alloc_traits.h</a>.</p>
</div><h2 class="groupheader">Member Typedef Documentation</h2>
<a id="ad2eb6f18c8a2ff167bc276f2ca6c89e2"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ad2eb6f18c8a2ff167bc276f2ca6c89e2">&#9670;&nbsp;</a></span>const_void_pointer</h2>

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<div class="memtemplate">
template&lt;typename _Alloc&gt; </div>
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          <td class="memname">typedef __const_void_pointer <a class="el" href="a04085.html">std::allocator_traits</a>&lt; _Alloc &gt;::<a class="el" href="a04085.html#ad2eb6f18c8a2ff167bc276f2ca6c89e2">const_void_pointer</a></td>
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<span class="mlabels"><span class="mlabel">inherited</span></span>  </td>
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</div><div class="memdoc">

<p>The allocator's const void pointer type. </p>
<p><code>Alloc::const_void_pointer</code> if that type exists, otherwise <code> pointer_traits&lt;pointer&gt;::rebind&lt;const void&gt; </code> </p>

<p class="definition">Definition at line <a class="el" href="a14746_source.html#l00138">138</a> of file <a class="el" href="a14746_source.html">bits/alloc_traits.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#aaf8537cdd5491ce78baf889aa79c9216">&#9670;&nbsp;</a></span>propagate_on_container_copy_assignment</h2>

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<div class="memtemplate">
template&lt;typename _Alloc&gt; </div>
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          <td class="memname">typedef __propagate_on_container_copy_assignment <a class="el" href="a04085.html">std::allocator_traits</a>&lt; _Alloc &gt;::<a class="el" href="a04085.html#aaf8537cdd5491ce78baf889aa79c9216">propagate_on_container_copy_assignment</a></td>
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<span class="mlabels"><span class="mlabel">inherited</span></span>  </td>
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<p>How the allocator is propagated on copy assignment. </p>
<p><code>Alloc::propagate_on_container_copy_assignment</code> if that type exists, otherwise <code>false_type</code> </p>

<p class="definition">Definition at line <a class="el" href="a14746_source.html#l00172">172</a> of file <a class="el" href="a14746_source.html">bits/alloc_traits.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#aaa25d41df1ee33bc852b46687f42c8a2">&#9670;&nbsp;</a></span>propagate_on_container_move_assignment</h2>

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<div class="memproto">
<div class="memtemplate">
template&lt;typename _Alloc&gt; </div>
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          <td class="memname">typedef __propagate_on_container_move_assignment <a class="el" href="a04085.html">std::allocator_traits</a>&lt; _Alloc &gt;::<a class="el" href="a04085.html#aaa25d41df1ee33bc852b46687f42c8a2">propagate_on_container_move_assignment</a></td>
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<span class="mlabels"><span class="mlabel">inherited</span></span>  </td>
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<p>How the allocator is propagated on move assignment. </p>
<p><code>Alloc::propagate_on_container_move_assignment</code> if that type exists, otherwise <code>false_type</code> </p>

<p class="definition">Definition at line <a class="el" href="a14746_source.html#l00184">184</a> of file <a class="el" href="a14746_source.html">bits/alloc_traits.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#ab473299e767e1bd58e5b71f0a87c05b1">&#9670;&nbsp;</a></span>propagate_on_container_swap</h2>

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template&lt;typename _Alloc&gt; </div>
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          <td class="memname">typedef __propagate_on_container_swap <a class="el" href="a04085.html">std::allocator_traits</a>&lt; _Alloc &gt;::<a class="el" href="a04085.html#ab473299e767e1bd58e5b71f0a87c05b1">propagate_on_container_swap</a></td>
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<p>How the allocator is propagated on swap. </p>
<p><code>Alloc::propagate_on_container_swap</code> if that type exists, otherwise <code>false_type</code> </p>

<p class="definition">Definition at line <a class="el" href="a14746_source.html#l00195">195</a> of file <a class="el" href="a14746_source.html">bits/alloc_traits.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a7bf3224b11fa6d5a86d3c9bcfa9bae40">&#9670;&nbsp;</a></span>void_pointer</h2>

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template&lt;typename _Alloc&gt; </div>
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          <td class="memname">typedef __void_pointer <a class="el" href="a04085.html">std::allocator_traits</a>&lt; _Alloc &gt;::<a class="el" href="a04085.html#a7bf3224b11fa6d5a86d3c9bcfa9bae40">void_pointer</a></td>
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<p>The allocator's void pointer type. </p>
<p><code>Alloc::void_pointer</code> if that type exists, otherwise <code> pointer_traits&lt;pointer&gt;::rebind&lt;void&gt; </code> </p>

<p class="definition">Definition at line <a class="el" href="a14746_source.html#l00127">127</a> of file <a class="el" href="a14746_source.html">bits/alloc_traits.h</a>.</p>

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<h2 class="groupheader">Member Function Documentation</h2>
<a id="a1afbf725286c9e82ba6166dcc04b10bc"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a1afbf725286c9e82ba6166dcc04b10bc">&#9670;&nbsp;</a></span>allocate() <span class="overload">[1/2]</span></h2>

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template&lt;typename _Alloc&gt; </div>
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          <td class="memname">static <a class="el" href="a04085.html#a8fa48f2bd3c8a0c32836872689b2ca62">pointer</a> <a class="el" href="a04085.html">std::allocator_traits</a>&lt; _Alloc &gt;::allocate </td>
          <td>(</td>
          <td class="paramtype">_Alloc &amp;&#160;</td>
          <td class="paramname"><em>__a</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="a04085.html#aba783acc03d73b750b1525250084f104">size_type</a>&#160;</td>
          <td class="paramname"><em>__n</em>&#160;</td>
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          <td>)</td>
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span><span class="mlabel">inherited</span></span>  </td>
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<p>Allocate memory. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">__a</td><td>An allocator. </td></tr>
    <tr><td class="paramname">__n</td><td>The number of objects to allocate space for.</td></tr>
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<p>Calls <code>a.allocate(n)</code> </p>

<p class="definition">Definition at line <a class="el" href="a14746_source.html#l00359">359</a> of file <a class="el" href="a14746_source.html">bits/alloc_traits.h</a>.</p>

<p class="reference">Referenced by <a class="el" href="a00260_source.html#l00100">std::__allocate_guarded()</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a79296fdf0f48ef0a49f2d5de6193f867">&#9670;&nbsp;</a></span>allocate() <span class="overload">[2/2]</span></h2>

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template&lt;typename _Alloc&gt; </div>
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          <td class="memname">static <a class="el" href="a04085.html#a8fa48f2bd3c8a0c32836872689b2ca62">pointer</a> <a class="el" href="a04085.html">std::allocator_traits</a>&lt; _Alloc &gt;::allocate </td>
          <td>(</td>
          <td class="paramtype">_Alloc &amp;&#160;</td>
          <td class="paramname"><em>__a</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="a04085.html#aba783acc03d73b750b1525250084f104">size_type</a>&#160;</td>
          <td class="paramname"><em>__n</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="a04085.html#ad2eb6f18c8a2ff167bc276f2ca6c89e2">const_void_pointer</a>&#160;</td>
          <td class="paramname"><em>__hint</em>&#160;</td>
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          <td>)</td>
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<p>Allocate memory. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">__a</td><td>An allocator. </td></tr>
    <tr><td class="paramname">__n</td><td>The number of objects to allocate space for. </td></tr>
    <tr><td class="paramname">__hint</td><td>Aid to locality. </td></tr>
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  </dd>
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<dl class="section return"><dt>Returns</dt><dd>Memory of suitable size and alignment for <em>n</em> objects of type <code>value_type</code> </dd></dl>
<p>Returns <code> a.allocate(n, hint) </code> if that expression is well-formed, otherwise returns <code>a.allocate(n)</code> </p>

<p class="definition">Definition at line <a class="el" href="a14746_source.html#l00374">374</a> of file <a class="el" href="a14746_source.html">bits/alloc_traits.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#aad7d7b8604439d1ecf953a1b9a426e7b">&#9670;&nbsp;</a></span>construct()</h2>

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template&lt;typename _Alloc&gt; </div>
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template&lt;typename _Tp , typename... _Args&gt; </div>
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          <td class="memname">static auto <a class="el" href="a04085.html">std::allocator_traits</a>&lt; _Alloc &gt;::construct </td>
          <td>(</td>
          <td class="paramtype">_Alloc &amp;&#160;</td>
          <td class="paramname"><em>__a</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">_Tp *&#160;</td>
          <td class="paramname"><em>__p</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">_Args &amp;&amp;...&#160;</td>
          <td class="paramname"><em>__args</em>&#160;</td>
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          <td></td>
          <td>)</td>
          <td></td><td> -&gt; decltype(_S_construct(__a, __p, <a class="el" href="a01431.html#gacb5baec338e12b99cb6bddea7506c7c6">std::forward</a>&lt;_Args&gt;(__args)...))
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<p>Construct an object of type <em>_Tp</em>. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">__a</td><td>An allocator. </td></tr>
    <tr><td class="paramname">__p</td><td>Pointer to memory of suitable size and alignment for Tp </td></tr>
    <tr><td class="paramname">__args</td><td>Constructor arguments.</td></tr>
  </table>
  </dd>
</dl>
<p>Calls <code> __a.construct(__p, std::forward&lt;Args&gt;(__args)...) </code> if that expression is well-formed, otherwise uses placement-new to construct an object of type <em>_Tp</em> at location <em>__p</em> from the arguments <em>__args</em>... </p>

<p class="definition">Definition at line <a class="el" href="a14746_source.html#l00400">400</a> of file <a class="el" href="a14746_source.html">bits/alloc_traits.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#ae5f6b86b98b17e2ba39243ca8eaf4ee1">&#9670;&nbsp;</a></span>deallocate()</h2>

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template&lt;typename _Alloc&gt; </div>
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          <td>(</td>
          <td class="paramtype">_Alloc &amp;&#160;</td>
          <td class="paramname"><em>__a</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="a04085.html#a8fa48f2bd3c8a0c32836872689b2ca62">pointer</a>&#160;</td>
          <td class="paramname"><em>__p</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="a04085.html#aba783acc03d73b750b1525250084f104">size_type</a>&#160;</td>
          <td class="paramname"><em>__n</em>&#160;</td>
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<p>Deallocate memory. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">__a</td><td>An allocator. </td></tr>
    <tr><td class="paramname">__p</td><td>Pointer to the memory to deallocate. </td></tr>
    <tr><td class="paramname">__n</td><td>The number of objects space was allocated for.</td></tr>
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  </dd>
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<p>Calls <code> a.deallocate(p, n) </code> </p>

<p class="definition">Definition at line <a class="el" href="a14746_source.html#l00385">385</a> of file <a class="el" href="a14746_source.html">bits/alloc_traits.h</a>.</p>

<p class="reference">Referenced by <a class="el" href="a00260_source.html#l00069">std::__allocated_ptr&lt; _Alloc &gt;::~__allocated_ptr()</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#ac73f3d164cf01c9d61b44d42c30db3d3">&#9670;&nbsp;</a></span>destroy()</h2>

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template&lt;typename _Alloc&gt; </div>
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template&lt;typename _Tp &gt; </div>
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          <td class="paramtype">_Alloc &amp;&#160;</td>
          <td class="paramname"><em>__a</em>, </td>
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          <td class="paramkey"></td>
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          <td class="paramtype">_Tp *&#160;</td>
          <td class="paramname"><em>__p</em>&#160;</td>
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<p>Destroy an object of type <em>_Tp</em>. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">__a</td><td>An allocator. </td></tr>
    <tr><td class="paramname">__p</td><td>Pointer to the object to destroy</td></tr>
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  </dd>
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<p>Calls <code>__a.destroy(__p)</code> if that expression is well-formed, otherwise calls <code>__p-&gt;~_Tp()</code> </p>

<p class="definition">Definition at line <a class="el" href="a14746_source.html#l00413">413</a> of file <a class="el" href="a14746_source.html">bits/alloc_traits.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a29c306bcb6a7676a516430a0e50b990a">&#9670;&nbsp;</a></span>max_size()</h2>

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template&lt;typename _Alloc&gt; </div>
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          <td class="memname">static <a class="el" href="a04085.html#aba783acc03d73b750b1525250084f104">size_type</a> <a class="el" href="a04085.html">std::allocator_traits</a>&lt; _Alloc &gt;::max_size </td>
          <td>(</td>
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<p>The maximum supported allocation size. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">__a</td><td>An allocator. </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><code>__a.max_size()</code> or <code>numeric_limits&lt;size_type&gt;::max()</code> </dd></dl>
<p>Returns <code>__a.max_size()</code> if that expression is well-formed, otherwise returns <code>numeric_limits&lt;size_type&gt;::max()</code> </p>

<p class="definition">Definition at line <a class="el" href="a14746_source.html#l00424">424</a> of file <a class="el" href="a14746_source.html">bits/alloc_traits.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#ac324d9065f45f7ae2dd1e0014c73f218">&#9670;&nbsp;</a></span>select_on_container_copy_construction()</h2>

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template&lt;typename _Alloc&gt; </div>
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          <td>(</td>
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<p>Obtain an allocator to use when copying a container. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">__rhs</td><td>An allocator. </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><code>__rhs.select_on_container_copy_construction()</code> or <em>__rhs</em> </dd></dl>
<p>Returns <code>__rhs.select_on_container_copy_construction()</code> if that expression is well-formed, otherwise returns <em>__rhs</em> </p>

<p class="definition">Definition at line <a class="el" href="a14746_source.html#l00436">436</a> of file <a class="el" href="a14746_source.html">bits/alloc_traits.h</a>.</p>

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