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  29 <h2><span class="refentrytitle">Class template apply_visitor_delayed_cpp14_t</span></h2>
  30 <p>boost::apply_visitor_delayed_cpp14_t &#8212; Adapts a visitor for use as a function object.</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="../variant/reference.html#header.boost.variant.apply_visitor_hpp" title="Header &lt;boost/variant/apply_visitor.hpp&gt;">boost/variant/apply_visitor.hpp</a>&gt;
  34
  35 </span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Visitor<span class="special">&gt;</span>
  36 <span class="keyword">class</span> <a class="link" href="apply_visitor_idp777749504.html" title="Class template apply_visitor_delayed_cpp14_t">apply_visitor_delayed_cpp14_t</a> <span class="special">{</span>
  37 <span class="keyword">public</span><span class="special">:</span>
  38   <span class="comment">// <a class="link" href="apply_visitor_idp777749504.html#boost.apply_visitor_idp777749504construct-copy-destruct">construct/copy/destruct</a></span>
  39   <span class="keyword">explicit</span> <a class="link" href="apply_visitor_idp777749504.html#idp777758496-bb"><span class="identifier">apply_visitor_delayed_cpp14_t</span></a><span class="special">(</span><span class="identifier">Visitor</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  40
  41   <span class="comment">// <a class="link" href="apply_visitor_idp777749504.html#idp777761328-bb">function object interface</a></span>
  42   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ... Variant<span class="special">&gt;</span> <span class="keyword">decltype</span><span class="special">(</span><span class="keyword">auto</span><span class="special">)</span> <a class="link" href="apply_visitor_idp777749504.html#idp777762464-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">Variant</span><span class="special">&amp;</span><span class="special">...</span><span class="special">)</span><span class="special">;</span>
  43 <span class="special">}</span><span class="special">;</span></pre></div>
  44 <div class="refsect1">
  45 <a name="idp615491728"></a><h2>Description</h2>
  46 <p>Adapts the function given at construction for use as a
  47           function object. This is useful, for example, when one needs to
  48           operate on each element of a sequence of variant objects using a
  49           standard library algorithm such as
  50           <code class="computeroutput">std::for_each</code>.</p>
  51 <p>See the "visitor-only" form of
  52           <code class="computeroutput"><a class="link" href="apply_visitor.html" title="Function apply_visitor">apply_visitor</a></code> for a simple
  53           way to create <code class="computeroutput">apply_visitor_delayed_t</code> objects.</p>
  54 <p>See <code class="computeroutput"><a class="link" href="apply_visitor_delayed_t.html" title="Class template apply_visitor_delayed_t">apply_visitor_delayed_t</a></code>
  55             which is used when <code class="computeroutput">Visitor</code> has <code class="computeroutput">result_type</code>
  56             typedef.</p>
  57 <p>Available only if macro
  58           <a class="link" href="../BOOST_VARIANT_DO_NOT_USE_VARIADIC_TEMPLATES.html" title="Macro BOOST_VARIANT_DO_NOT_USE_VARIADIC_TEMPLATES">BOOST_VARIANT_DO_NOT_USE_VARIADIC_TEMPLATES</a> is not defined and
  59           compiler supports <code class="computeroutput">decltype(auto)</code> and <code class="computeroutput">decltype(some-expression)</code>.</p>
  60 <div class="refsect2">
  61 <a name="idp615501984"></a><h3>
  62 <a name="boost.apply_visitor_idp777749504construct-copy-destruct"></a><code class="computeroutput">apply_visitor_delayed_cpp14_t</code>
  63         public
  64        construct/copy/destruct</h3>
  65 <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
  66 <pre class="literallayout"><span class="keyword">explicit</span> <a name="idp777758496-bb"></a><span class="identifier">apply_visitor_delayed_cpp14_t</span><span class="special">(</span><span class="identifier">Visitor</span> <span class="special">&amp;</span> visitor<span class="special">)</span><span class="special">;</span></pre>
  67 <div class="variablelist"><table border="0" class="variablelist compact">
  68 <colgroup>
  69 <col align="left" valign="top">
  70 <col>
  71 </colgroup>
  72 <tbody><tr>
  73 <td><p><span class="term">Effects:</span></p></td>
  74 <td>Constructs the function object with the given
  75             visitor.</td>
  76 </tr></tbody>
  77 </table></div>
  78 </li></ol></div>
  79 </div>
  80 <div class="refsect2">
  81 <a name="idp615511552"></a><h3>
  82 <a name="idp777761328-bb"></a><code class="computeroutput">apply_visitor_delayed_cpp14_t</code> function object interface</h3>
  83 <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
  84 <pre class="literallayout"><a name="idp777761904-bb"></a><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ... Variant<span class="special">&gt;</span> <span class="keyword">decltype</span><span class="special">(</span><span class="keyword">auto</span><span class="special">)</span> <a name="idp777762464-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">Variant</span><span class="special">&amp;</span><span class="special">...</span> operand<span class="special">)</span><span class="special">;</span></pre>Function call operator.<p class="simpara">Invokes
  85             <code class="computeroutput"><a class="link" href="apply_visitor.html" title="Function apply_visitor">apply_visitor</a></code> on the
  86             stored visitor using the given operands.</p>
  87 </li></ol></div>
  88 </div>
  89 </div>
  90 </div>
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  93 <td align="right"><div class="copyright-footer">Copyright &#169; 2002, 2003 Eric Friedman, Itay Maman<p>Distributed under the Boost Software License, Version 1.0.
  94     (See accompanying file <code class="filename">LICENSE_1_0.txt</code> or copy at
  95     <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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