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| <h2><span class="refentrytitle">Struct template null_eval</span></h2> |
| <p>boost::proto::context::null_eval</p> |
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| <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="../../../proto/reference.html#header.boost.proto.context.null_hpp" title="Header <boost/proto/context/null.hpp>">boost/proto/context/null.hpp</a>> |
| |
| </span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <a class="link" href="../../../Expr.html" title="Concept Expr">Expr</a><span class="special">,</span> <span class="keyword">typename</span> Context<span class="special">></span> |
| <span class="keyword">struct</span> <a class="link" href="null_eval.html" title="Struct template null_eval">null_eval</a> <span class="special">{</span> |
| <span class="comment">// types</span> |
| <span class="keyword">typedef</span> <span class="keyword">void</span> <a name="boost.proto.context.null_eval.result_type"></a><span class="identifier">result_type</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="null_eval.html#id1298855-bb">public member functions</a></span> |
| <span class="keyword">void</span> <a class="link" href="null_eval.html#id1298860-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">Expr</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">Context</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="special">}</span><span class="special">;</span></pre></div> |
| <div class="refsect1"> |
| <a name="id2455529"></a><h2>Description</h2> |
| <div class="refsect2"> |
| <a name="id2455532"></a><h3> |
| <a name="id1298855-bb"></a><code class="computeroutput">null_eval</code> public member functions</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"> |
| <pre class="literallayout"><span class="keyword">void</span> <a name="id1298860-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">Expr</span> <span class="special">&</span> expr<span class="special">,</span> <span class="identifier">Context</span> <span class="special">&</span> context<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p> |
| For <code class="computeroutput">N</code> in <code class="computeroutput">[0,Expr arity)</code>, |
| evaluate: |
| </p> |
| <pre class="programlisting"><code class="computeroutput"><a class="link" href="../eval_id1259332.html" title="Function eval">proto::eval</a></code>(<code class="computeroutput"><a class="link" href="../child_c_id1289588.html" title="Function child_c">proto::child_c</a></code><N>(expr), context)</pre> |
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| <td align="right"><div class="copyright-footer">Copyright © 2008 Eric Niebler<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt 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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