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| <a name="boost.proto.functional.flatten"></a><div class="titlepage"></div> |
| <div class="refnamediv"> |
| <h2><span class="refentrytitle">Struct flatten</span></h2> |
| <p>boost::proto::functional::flatten — A <a class="link" href="../../../PolymorphicFunctionObject.html" title="Concept PolymorphicFunctionObject">PolymorphicFunctionObject</a> type that returns a "flattened" |
| view of a Proto expression tree. </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="../../../proto/reference.html#header.boost.proto.fusion_hpp" title="Header <boost/proto/fusion.hpp>">boost/proto/fusion.hpp</a>> |
| |
| </span> |
| <span class="keyword">struct</span> <a class="link" href="flatten.html" title="Struct flatten">flatten</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"><</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">struct</span> <a class="link" href="flatten/result_This_Expr__id1262594.html" title="Struct template result<This(Expr)>">result</a><span class="special"><</span><span class="identifier">This</span><span class="special">(</span><span class="identifier">Expr</span><span class="special">)</span><span class="special">></span> <span class="special">:</span> <span class="keyword"></span> result< This(Expr const &) > <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> 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">struct</span> <a class="link" href="flatten/result_This_Expr____id1262628.html" title="Struct template result<This(Expr &)>">result</a><span class="special"><</span><span class="identifier">This</span><span class="special">(</span><span class="identifier">Expr</span> <span class="special">&</span><span class="special">)</span><span class="special">></span> <span class="special">:</span> <span class="keyword"></span> <a class="link" href="../result_of/flatten.html" title="Struct template flatten">proto::result_of::flatten</a>< Expr > <span class="special">{</span> |
| <span class="special">}</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="flatten.html#id1262664-bb">public member functions</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> <a class="link" href="../result_of/flatten.html" title="Struct template flatten">proto::result_of::flatten</a><span class="special"><</span> <span class="identifier">Expr</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> <span class="keyword">const</span> |
| <a class="link" href="flatten.html#id1262669-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="keyword">const</span><span class="special">;</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> <a class="link" href="../result_of/flatten.html" title="Struct template flatten">proto::result_of::flatten</a><span class="special"><</span> <span class="identifier">Expr</span> <span class="keyword">const</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> <span class="keyword">const</span> |
| <a class="link" href="flatten.html#id1262703-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="keyword">const</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="id2290683"></a><h2>Description</h2> |
| <p> |
| A <a class="link" href="../../../PolymorphicFunctionObject.html" title="Concept PolymorphicFunctionObject">PolymorphicFunctionObject</a> type that returns a "flattened" view |
| of a Proto expression tree. For a tree with a top-most node tag of type |
| <code class="computeroutput">T</code>, the elements of the flattened sequence are determined by |
| recursing into each child node with the same tag type and returning those nodes of different |
| type. So for instance, the Proto expression tree corresponding to the expression |
| <code class="computeroutput">a | b | c</code> has a flattened view with elements [a, b, c], even |
| though the tree is grouped as <code class="computeroutput">((a | b) | c)</code>. |
| </p> |
| <div class="refsect2"> |
| <a name="id2290724"></a><h3> |
| <a name="id1262664-bb"></a><code class="computeroutput">flatten</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"><</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> <a class="link" href="../result_of/flatten.html" title="Struct template flatten">proto::result_of::flatten</a><span class="special"><</span> <span class="identifier">Expr</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> <span class="keyword">const</span> |
| <a name="id1262669-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="keyword">const</span><span class="special">;</span></pre></li> |
| <li class="listitem"><pre class="literallayout"><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> <a class="link" href="../result_of/flatten.html" title="Struct template flatten">proto::result_of::flatten</a><span class="special"><</span> <span class="identifier">Expr</span> <span class="keyword">const</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> <span class="keyword">const</span> |
| <a name="id1262703-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="keyword">const</span> <span class="special">&</span> expr<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li> |
| </ol></div> |
| </div> |
| </div> |
| </div> |
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| <td align="left"></td> |
| <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>) |
| </p> |
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