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<title>Class template apply_visitor_delayed_cpp14_t</title>
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<h2><span class="refentrytitle">Class template apply_visitor_delayed_cpp14_t</span></h2>
<p>boost::apply_visitor_delayed_cpp14_t &#8212; Adapts a visitor for use as a function object.</p>
</div>
<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<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;

</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Visitor<span class="special">&gt;</span> 
<span class="keyword">class</span> <a class="link" href="apply_visitor_idp800707168.html" title="Class template apply_visitor_delayed_cpp14_t">apply_visitor_delayed_cpp14_t</a> <span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
  <span class="comment">// <a class="link" href="apply_visitor_idp800707168.html#boost.apply_visitor_idp800707168construct-copy-destruct">construct/copy/destruct</a></span>
  <span class="keyword">explicit</span> <a class="link" href="apply_visitor_idp800707168.html#idp800716160-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>

  <span class="comment">// <a class="link" href="apply_visitor_idp800707168.html#idp800718992-bb">function object interface</a></span>
  <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_idp800707168.html#idp800720128-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>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idp596538736"></a><h2>Description</h2>
<p>Adapts the function given at construction for use as a
          function object. This is useful, for example, when one needs to
          operate on each element of a sequence of variant objects using a
          standard library algorithm such as
          <code class="computeroutput">std::for_each</code>.</p>
<p>See the "visitor-only" form of
          <code class="computeroutput"><a class="link" href="apply_visitor.html" title="Function apply_visitor">apply_visitor</a></code> for a simple
          way to create <code class="computeroutput">apply_visitor_delayed_t</code> objects.</p>
<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>
            which is used when <code class="computeroutput">Visitor</code> has <code class="computeroutput">result_type</code>
            typedef.</p>
<p>Available only if macro
          <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
          compiler supports <code class="computeroutput">decltype(auto)</code> and <code class="computeroutput">decltype(some-expression)</code>.</p>
<div class="refsect2">
<a name="idp596548992"></a><h3>
<a name="boost.apply_visitor_idp800707168construct-copy-destruct"></a><code class="computeroutput">apply_visitor_delayed_cpp14_t</code> 
        public
       construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
<pre class="literallayout"><span class="keyword">explicit</span> <a name="idp800716160-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>
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<col>
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<td><p><span class="term">Effects:</span></p></td>
<td>Constructs the function object with the given
            visitor.</td>
</tr></tbody>
</table></div>
</li></ol></div>
</div>
<div class="refsect2">
<a name="idp596558560"></a><h3>
<a name="idp800718992-bb"></a><code class="computeroutput">apply_visitor_delayed_cpp14_t</code> function object interface</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
<pre class="literallayout"><a name="idp800719568-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="idp800720128-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
            <code class="computeroutput"><a class="link" href="apply_visitor.html" title="Function apply_visitor">apply_visitor</a></code> on the
            stored visitor using the given operands.</p>
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<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.
    (See accompanying file <code class="filename">LICENSE_1_0.txt</code> or copy at 
    <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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