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+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
+<title>Struct eval</title>
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+</div>
+<div class="refentry">
+<a name="boost.proto.functional.eval"></a><div class="titlepage"></div>
+<div class="refnamediv">
+<h2><span class="refentrytitle">Struct eval</span></h2>
+<p>boost::proto::functional::eval &#8212; A <a class="link" href="../../../PolymorphicFunctionObject.html" title="Concept PolymorphicFunctionObject">PolymorphicFunctionObject</a> type for evaluating a given Proto
+ expression with a given context.</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="../../../proto/reference.html#header.boost.proto.eval_hpp" title="Header &lt;boost/proto/eval.hpp&gt;">boost/proto/eval.hpp</a>&gt;
+
+</span>
+<span class="keyword">struct</span> <a class="link" href="eval.html" title="Struct eval">eval</a> <span class="special">:</span> <span class="keyword"></span> <a class="link" href="../callable.html" title="Struct callable">proto::callable</a> <span class="special">{</span>
+ <span class="comment">// member classes/structs/unions</span>
+ <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> This<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">&gt;</span>
+ <span class="keyword">struct</span> <a class="link" href="eval/result_This_Expr__Conte_id1495023.html" title="Struct template result&lt;This(Expr, Context)&gt;">result</a><span class="special">&lt;</span><span class="identifier">This</span><span class="special">(</span><span class="identifier">Expr</span><span class="special">,</span> <span class="identifier">Context</span><span class="special">)</span><span class="special">&gt;</span> <span class="special">:</span> <span class="keyword"></span>
+ <a class="link" href="../result_of/eval.html" title="Struct template eval">proto::result_of::eval</a><span class="special">&lt;</span>
+ <span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">remove_reference</span><span class="special">&lt;</span> <span class="identifier">Expr</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span><span class="special">,</span>
+ <span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">remove_reference</span><span class="special">&lt;</span> <span class="identifier">Context</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
+ <span class="special">&gt;</span>
+ <span class="special">{</span>
+ <span class="special">}</span><span class="special">;</span>
+
+ <span class="comment">// <a class="link" href="eval.html#id1495067-bb">public member functions</a></span>
+ <span class="keyword">template</span><span class="special">&lt;</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">&gt;</span>
+ <span class="keyword">typename</span> <a class="link" href="../result_of/eval.html" title="Struct template eval">proto::result_of::eval</a><span class="special">&lt;</span> <span class="identifier">Expr</span><span class="special">,</span> <span class="identifier">Context</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
+ <a class="link" href="eval.html#id1495072-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">&amp;</span><span class="special">,</span> <span class="identifier">Context</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
+ <span class="keyword">template</span><span class="special">&lt;</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">&gt;</span>
+ <span class="keyword">typename</span> <a class="link" href="../result_of/eval.html" title="Struct template eval">proto::result_of::eval</a><span class="special">&lt;</span> <span class="identifier">Expr</span><span class="special">,</span> <span class="identifier">Context</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
+ <a class="link" href="eval.html#id1495156-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">&amp;</span><span class="special">,</span> <span class="identifier">Context</span> <span class="keyword">const</span> <span class="special">&amp;</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="id2717314"></a><h2>Description</h2>
+<div class="refsect2">
+<a name="id2717317"></a><h3>
+<a name="id1495067-bb"></a><code class="computeroutput">eval</code> public member functions</h3>
+<div class="orderedlist"><ol class="orderedlist" type="1">
+<li class="listitem">
+<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</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">&gt;</span>
+ <span class="keyword">typename</span> <a class="link" href="../result_of/eval.html" title="Struct template eval">proto::result_of::eval</a><span class="special">&lt;</span> <span class="identifier">Expr</span><span class="special">,</span> <span class="identifier">Context</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
+ <a name="id1495072-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">&amp;</span> expr<span class="special">,</span> <span class="identifier">Context</span> <span class="special">&amp;</span> context<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>Evaluate a given Proto expression with a given context. <div class="variablelist"><table border="0">
+<col align="left" valign="top">
+<tbody>
+<tr>
+<td><p><span class="term">Parameters:</span></p></td>
+<td><div class="variablelist"><table border="0">
+<col align="left" valign="top">
+<tbody>
+<tr>
+<td><p><span class="term"><code class="computeroutput">context</code></span></p></td>
+<td><p>The context in which the expression should be evaluated. </p></td>
+</tr>
+<tr>
+<td><p><span class="term"><code class="computeroutput">expr</code></span></p></td>
+<td><p>The Proto expression to evaluate.</p></td>
+</tr>
+</tbody>
+</table></div></td>
+</tr>
+<tr>
+<td><p><span class="term">Returns:</span></p></td>
+<td><p>
+ <code class="computeroutput">typename Context::template eval&lt;Expr&gt;()(expr, context)</code>
+ </p></td>
+</tr>
+</tbody>
+</table></div>
+</li>
+<li class="listitem">
+<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</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">&gt;</span>
+ <span class="keyword">typename</span> <a class="link" href="../result_of/eval.html" title="Struct template eval">proto::result_of::eval</a><span class="special">&lt;</span> <span class="identifier">Expr</span><span class="special">,</span> <span class="identifier">Context</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
+ <a name="id1495156-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">&amp;</span> expr<span class="special">,</span> <span class="identifier">Context</span> <span class="keyword">const</span> <span class="special">&amp;</span> context<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
+<p>
+ This is an overloaded member function, provided for convenience. It differs from the above
+ function only in what argument(s) it accepts.
+ </p>
+</li>
+</ol></div>
+</div>
+</div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 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>)
+ </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="../domain_of.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../../proto/reference.html#header.boost.proto.eval_hpp"><img src="../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="eval/result_This_Expr__Conte_id1495023.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+</body>
+</html>