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| <h2><span class="refentrytitle">Class template apply_visitor_delayed_t</span></h2> |
| <p>boost::apply_visitor_delayed_t — 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: <<a class="link" href="../variant/reference.html#header.boost.variant.apply_visitor_hpp" title="Header <boost/variant/apply_visitor.hpp>">boost/variant/apply_visitor.hpp</a>> |
| |
| </span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Visitor<span class="special">></span> |
| <span class="keyword">class</span> <a class="link" href="apply_visitor_delayed_t.html" title="Class template apply_visitor_delayed_t">apply_visitor_delayed_t</a> <span class="special">{</span> |
| <span class="keyword">public</span><span class="special">:</span> |
| <span class="comment">// types</span> |
| <span class="keyword">typedef</span> <span class="keyword">typename</span> <span class="identifier">Visitor</span><span class="special">::</span><span class="identifier">result_type</span> <a name="boost.apply_visitor_delayed_t.result_type"></a><span class="identifier">result_type</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="apply_visitor_delayed_t.html#boost.apply_visitor_delayed_tconstruct-copy-destruct">construct/copy/destruct</a></span> |
| <span class="keyword">explicit</span> <a class="link" href="apply_visitor_delayed_t.html#id1490975-bb"><span class="identifier">apply_visitor_delayed_t</span></a><span class="special">(</span><span class="identifier">Visitor</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="apply_visitor_delayed_t.html#id1490996-bb">function object interface</a></span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Variant<span class="special">></span> <span class="identifier">result_type</span> <a class="link" href="apply_visitor_delayed_t.html#id1491004-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">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Variant1<span class="special">,</span> <span class="keyword">typename</span> Variant2<span class="special">></span> |
| <span class="identifier">result_type</span> <a class="link" href="apply_visitor_delayed_t.html#id1369008-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">Variant1</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">Variant2</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="id3084737"></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> |
| <div class="refsect2"> |
| <a name="id3084776"></a><h3> |
| <a name="boost.apply_visitor_delayed_tconstruct-copy-destruct"></a><code class="computeroutput">apply_visitor_delayed_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="id1490975-bb"></a><span class="identifier">apply_visitor_delayed_t</span><span class="special">(</span><span class="identifier">Visitor</span> <span class="special">&</span> visitor<span class="special">)</span><span class="special">;</span></pre> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody><tr> |
| <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="id3084857"></a><h3> |
| <a name="id1490996-bb"></a><code class="computeroutput">apply_visitor_delayed_t</code> function object interface</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"> |
| <pre class="literallayout"><a name="id1491000-bb"></a><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Variant<span class="special">></span> <span class="identifier">result_type</span> <a name="id1491004-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">&</span> operand<span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Variant1<span class="special">,</span> <span class="keyword">typename</span> Variant2<span class="special">></span> |
| <span class="identifier">result_type</span> <a name="id1369008-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">Variant1</span> <span class="special">&</span> operand1<span class="special">,</span> <span class="identifier">Variant2</span> <span class="special">&</span> operand2<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> |
| </li></ol></div> |
| </div> |
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| <td align="right"><div class="copyright-footer">Copyright © 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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