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  26 <div class="refentry">
  27 <a name="boost.interprocess.null_index"></a><div class="titlepage"></div>
  28 <div class="refnamediv">
  29 <h2><span class="refentrytitle">Class template null_index</span></h2>
  30 <p>boost::interprocess::null_index</p>
  31 </div>
  32 <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
  33 <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../interprocess/indexes_reference.html#header.boost.interprocess.indexes.null_index_hpp" title="Header &lt;boost/interprocess/indexes/null_index.hpp&gt;">boost/interprocess/indexes/null_index.hpp</a>&gt;
  34
  35 </span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> MapConfig<span class="special">&gt;</span>
  36 <span class="keyword">class</span> <a class="link" href="null_index.html" title="Class template null_index">null_index</a> <span class="special">{</span>
  37 <span class="keyword">public</span><span class="special">:</span>
  38   <span class="comment">// types</span>
  39   <span class="keyword">typedef</span> <span class="keyword">int</span> <span class="special">*</span>       <a name="boost.interprocess.null_index.iterator"></a><span class="identifier">iterator</span><span class="special">;</span>
  40   <span class="keyword">typedef</span> <span class="keyword">const</span> <span class="keyword">int</span> <span class="special">*</span> <a name="boost.interprocess.null_index.const_iterator"></a><span class="identifier">const_iterator</span><span class="special">;</span>
  41
  42   <span class="comment">// <a class="link" href="null_index.html#boost.interprocess.null_indexconstruct-copy-destruct">construct/copy/destruct</a></span>
  43   <a class="link" href="null_index.html#idm45336642164512-bb"><span class="identifier">null_index</span></a><span class="special">(</span><a class="link" href="segment_manager_base.html" title="Class template segment_manager_base">segment_manager_base</a> <span class="special">*</span><span class="special">)</span><span class="special">;</span>
  44
  45   <span class="comment">// <a class="link" href="null_index.html#idm45336642170896-bb">public member functions</a></span>
  46   <span class="identifier">const_iterator</span> <a class="link" href="null_index.html#idm45336642170336-bb"><span class="identifier">begin</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  47   <span class="identifier">iterator</span> <a class="link" href="null_index.html#idm45336642168784-bb"><span class="identifier">begin</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  48   <span class="identifier">const_iterator</span> <a class="link" href="null_index.html#idm45336642167504-bb"><span class="identifier">end</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  49   <span class="identifier">iterator</span> <a class="link" href="null_index.html#idm45336642165952-bb"><span class="identifier">end</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  50 <span class="special">}</span><span class="special">;</span></pre></div>
  51 <div class="refsect1">
  52 <a name="id-1.3.19.17.3.31.4.4"></a><h2>Description</h2>
  53 <p>Null index type used to save compilation time when named indexes are not needed. </p>
  54 <div class="refsect2">
  55 <a name="id-1.3.19.17.3.31.4.4.3"></a><h3>
  56 <a name="boost.interprocess.null_indexconstruct-copy-destruct"></a><code class="computeroutput">null_index</code>
  57         public
  58        construct/copy/destruct</h3>
  59 <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
  60 <pre class="literallayout"><a name="idm45336642164512-bb"></a><span class="identifier">null_index</span><span class="special">(</span><a class="link" href="segment_manager_base.html" title="Class template segment_manager_base">segment_manager_base</a> <span class="special">*</span><span class="special">)</span><span class="special">;</span></pre>Empty constructor. </li></ol></div>
  61 </div>
  62 <div class="refsect2">
  63 <a name="id-1.3.19.17.3.31.4.4.4"></a><h3>
  64 <a name="idm45336642170896-bb"></a><code class="computeroutput">null_index</code> public member functions</h3>
  65 <div class="orderedlist"><ol class="orderedlist" type="1">
  66 <li class="listitem">
  67 <pre class="literallayout"><span class="identifier">const_iterator</span> <a name="idm45336642170336-bb"></a><span class="identifier">begin</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
  68 <p>begin() is equal to end() </p>
  69 </li>
  70 <li class="listitem">
  71 <pre class="literallayout"><span class="identifier">iterator</span> <a name="idm45336642168784-bb"></a><span class="identifier">begin</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
  72 <p>begin() is equal to end() </p>
  73 </li>
  74 <li class="listitem">
  75 <pre class="literallayout"><span class="identifier">const_iterator</span> <a name="idm45336642167504-bb"></a><span class="identifier">end</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
  76 <p>begin() is equal to end() </p>
  77 </li>
  78 <li class="listitem">
  79 <pre class="literallayout"><span class="identifier">iterator</span> <a name="idm45336642165952-bb"></a><span class="identifier">end</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
  80 <p>begin() is equal to end() </p>
  81 </li>
  82 </ol></div>
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