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  25 <div class="refentry">
  26 <a name="boost.nfp.nil"></a><div class="titlepage"></div>
  27 <div class="refnamediv">
  28 <h2><span class="refentrytitle">Struct nil</span></h2>
  29 <p>boost::nfp::nil</p>
  30 </div>
  31 <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
  32 <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="../../header/boost/test/utils/named_params_hpp.html" title="Header &lt;boost/test/utils/named_params.hpp&gt;">boost/test/utils/named_params.hpp</a>&gt;
  33
  34 </span>
  35 <span class="keyword">struct</span> <a class="link" href="nil.html" title="Struct nil">nil</a> <span class="special">{</span>
  36   <span class="comment">// <a class="link" href="nil.html#boost.nfp.nilconstruct-copy-destruct">construct/copy/destruct</a></span>
  37   <a class="link" href="nil.html#idm46279112149552-bb"><span class="identifier">nil</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  38
  39   <span class="comment">// <a class="link" href="nil.html#idm46279112171008-bb">public member functions</a></span>
  40   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <a class="link" href="nil.html#idm46279112170448-bb"><span class="keyword">operator</span> <span class="identifier">T</span> <span class="keyword">const</span> <span class="special">&amp;</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  41   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="identifier">T</span> <a class="link" href="nil.html#idm46279112168480-bb"><span class="identifier">any_cast</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  42   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Arg1<span class="special">&gt;</span> <a class="link" href="nil.html" title="Struct nil">nil</a> <a class="link" href="nil.html#idm46279112166512-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">Arg1</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  43   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Arg1<span class="special">,</span> <span class="keyword">typename</span> Arg2<span class="special">&gt;</span>
  44     <a class="link" href="nil.html" title="Struct nil">nil</a> <a class="link" href="nil.html#idm46279112164000-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">Arg1</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">Arg2</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  45   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Arg1<span class="special">,</span> <span class="keyword">typename</span> Arg2<span class="special">,</span> <span class="keyword">typename</span> Arg3<span class="special">&gt;</span>
  46     <a class="link" href="nil.html" title="Struct nil">nil</a> <a class="link" href="nil.html#idm46279112160240-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">Arg1</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">Arg2</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">Arg3</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  47   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Visitor<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="nil.html#idm46279112155232-bb"><span class="identifier">apply_to</span></a><span class="special">(</span><span class="identifier">Visitor</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  48
  49   <span class="comment">// <a class="link" href="nil.html#idm46279112152416-bb">public static functions</a></span>
  50   <span class="keyword">static</span> <a class="link" href="nil.html" title="Struct nil">nil</a> <span class="special">&amp;</span> <a class="link" href="nil.html#idm46279112151856-bb"><span class="identifier">inst</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  51 <span class="special">}</span><span class="special">;</span></pre></div>
  52 <div class="refsect1">
  53 <a name="idm45313881220592"></a><h2>Description</h2>
  54 <div class="refsect2">
  55 <a name="idm45313881220176"></a><h3>
  56 <a name="boost.nfp.nilconstruct-copy-destruct"></a><code class="computeroutput">nil</code>
  57         public
  58        construct/copy/destruct</h3>
  59 <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><pre class="literallayout"><a name="idm46279112149552-bb"></a><span class="identifier">nil</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li></ol></div>
  60 </div>
  61 <div class="refsect2">
  62 <a name="idm45313881214288"></a><h3>
  63 <a name="idm46279112171008-bb"></a><code class="computeroutput">nil</code> public member functions</h3>
  64 <div class="orderedlist"><ol class="orderedlist" type="1">
  65 <li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <a name="idm46279112170448-bb"></a><span class="keyword">operator</span> <span class="identifier">T</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li>
  66 <li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="identifier">T</span> <a name="idm46279112168480-bb"></a><span class="identifier">any_cast</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li>
  67 <li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Arg1<span class="special">&gt;</span> <a class="link" href="nil.html" title="Struct nil">nil</a> <a name="idm46279112166512-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">Arg1</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span></pre></li>
  68 <li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Arg1<span class="special">,</span> <span class="keyword">typename</span> Arg2<span class="special">&gt;</span>
  69   <a class="link" href="nil.html" title="Struct nil">nil</a> <a name="idm46279112164000-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">Arg1</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">Arg2</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span></pre></li>
  70 <li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Arg1<span class="special">,</span> <span class="keyword">typename</span> Arg2<span class="special">,</span> <span class="keyword">typename</span> Arg3<span class="special">&gt;</span>
  71   <a class="link" href="nil.html" title="Struct nil">nil</a> <a name="idm46279112160240-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">Arg1</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">Arg2</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">Arg3</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span></pre></li>
  72 <li class="listitem"><pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Visitor<span class="special">&gt;</span> <span class="keyword">void</span> <a name="idm46279112155232-bb"></a><span class="identifier">apply_to</span><span class="special">(</span><span class="identifier">Visitor</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li>
  73 </ol></div>
  74 </div>
  75 <div class="refsect2">
  76 <a name="idm45313881145664"></a><h3>
  77 <a name="idm46279112152416-bb"></a><code class="computeroutput">nil</code> public static functions</h3>
  78 <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <a class="link" href="nil.html" title="Struct nil">nil</a> <span class="special">&amp;</span> <a name="idm46279112151856-bb"></a><span class="identifier">inst</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li></ol></div>
  79 </div>
  80 </div>
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  88       </p>
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