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Eric Niebler 5b6d08974e Merged revisions 40861-40888 via svnmerge from 
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  r40862 | dave | 2007-11-06 15:39:09 -0800 (Tue, 06 Nov 2007) | 2 lines
  
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  r40863 | djowel | 2007-11-06 18:12:28 -0800 (Tue, 06 Nov 2007) | 1 line
  
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  r40864 | aaron_windsor | 2007-11-06 18:30:38 -0800 (Tue, 06 Nov 2007) | 1 line
  
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  r40871 | djowel | 2007-11-06 19:35:49 -0800 (Tue, 06 Nov 2007) | 1 line
  
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  r40874 | chris_kohlhoff | 2007-11-06 22:49:36 -0800 (Tue, 06 Nov 2007) | 2 lines
  
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  r40875 | chris_kohlhoff | 2007-11-06 22:53:17 -0800 (Tue, 06 Nov 2007) | 2 lines
  
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  r40876 | chris_kohlhoff | 2007-11-06 23:23:53 -0800 (Tue, 06 Nov 2007) | 2 lines
  
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  r40877 | joaquin | 2007-11-07 00:45:27 -0800 (Wed, 07 Nov 2007) | 1 line
  
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  r40878 | johnmaddock | 2007-11-07 02:07:08 -0800 (Wed, 07 Nov 2007) | 1 line
  
  Ooops, got the pp-logic wrong and disable long double support for all Unix platforms, instead of just Intel on Linux prior to version 10.
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  r40879 | johnmaddock | 2007-11-07 02:09:50 -0800 (Wed, 07 Nov 2007) | 1 line
  
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  r40880 | t_schwinger | 2007-11-07 02:14:42 -0800 (Wed, 07 Nov 2007) | 3 lines
  
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  r40881 | johnmaddock | 2007-11-07 03:50:02 -0800 (Wed, 07 Nov 2007) | 1 line
  
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  r40882 | johnmaddock | 2007-11-07 03:59:39 -0800 (Wed, 07 Nov 2007) | 3 lines
  
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  r40883 | johnmaddock | 2007-11-07 04:04:01 -0800 (Wed, 07 Nov 2007) | 1 line
  
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  r40884 | anthonyw | 2007-11-07 04:10:17 -0800 (Wed, 07 Nov 2007) | 1 line
  
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  r40885 | garcia | 2007-11-07 04:25:16 -0800 (Wed, 07 Nov 2007) | 2 lines
  
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  r40886 | garcia | 2007-11-07 05:38:53 -0800 (Wed, 07 Nov 2007) | 2 lines
  
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  r40887 | fcacciola | 2007-11-07 06:12:15 -0800 (Wed, 07 Nov 2007) | 1 line
  
  Added explicit failures for newly discovered GCC const ref binding bug (see Ticket #1301)
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[SVN r40891]
2007-11-07 16:22:38 +00:00

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<title>Sequence Facade</title>
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<div class="section" lang="en">
<div class="titlepage"><div><div><h3 class="title">
<a name="fusion.extension.sequence_facade"></a><a href="sequence_facade.html" title="Sequence Facade">Sequence Facade</a></h3></div></div></div>
<a name="fusion.extension.sequence_facade.description"></a><h4>
<a name="id646376"></a>
<a href="sequence_facade.html#fusion.extension.sequence_facade.description">Description</a>
</h4>
<p>
The <a href="sequence_facade.html" title="Sequence Facade"><tt class="computeroutput"><span class="identifier">sequence_facade</span></tt></a>
template provides an intrusive mechanism for producing a conforming Fusion
iterator.
</p>
<a name="fusion.extension.sequence_facade.synopsis"></a><h4>
<a name="id646425"></a>
<a href="sequence_facade.html#fusion.extension.sequence_facade.synopsis">Synopsis</a>
</h4>
<pre class="programlisting">
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Derived</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">TravesalTag</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">IsView</span> <span class="special">=</span> <span class="identifier">mpl</span><span class="special">::</span><span class="identifier">false_</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">sequence_facade</span><span class="special">;</span>
</pre>
<a name="fusion.extension.sequence_facade.usage"></a><h4>
<a name="id646560"></a>
<a href="sequence_facade.html#fusion.extension.sequence_facade.usage">Usage</a>
</h4>
<p>
The user of <a href="sequence_facade.html" title="Sequence Facade"><tt class="computeroutput"><span class="identifier">sequence_facade</span></tt></a> derives his sequence
type from a specialization of <a href="sequence_facade.html" title="Sequence Facade"><tt class="computeroutput"><span class="identifier">sequence_facade</span></tt></a> and passes the derived
sequence type as the first template parameter. The second template parameter
should be the traversal category of the sequence being implemented. The 3rd
parameter should be set to <tt class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span></tt>
if the sequence is a view.
</p>
<p>
The user must the implement the key expressions required by their sequence
type.
</p>
<div class="table">
<a name="id646649"></a><p class="title"><b>Table 1.91. Parameters</b></p>
<table class="table" summary="Parameters">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Name
</p>
</th>
<th>
<p>
Description
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">sequence</span></tt>, <tt class="computeroutput"><span class="identifier">Seq</span></tt>
</p>
</td>
<td>
<p>
A type derived from <a href="sequence_facade.html" title="Sequence Facade"><tt class="computeroutput"><span class="identifier">sequence_facade</span></tt></a>
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">N</span></tt>
</p>
</td>
<td>
<p>
An <a href="http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target="_top">MPL
Integral Constant</a>
</p>
</td>
</tr>
</tbody>
</table>
</div>
<div class="table">
<a name="id646782"></a><p class="title"><b>Table 1.92. Key Expressions</b></p>
<table class="table" summary="Key Expressions">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Expression
</p>
</th>
<th>
<p>
Result
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">sequence</span><span class="special">::</span><span class="keyword">template</span> <span class="identifier">begin</span><span class="special">&lt;</span><span class="identifier">Seq</span><span class="special">&gt;::</span><span class="identifier">type</span></tt>
</p>
</td>
<td>
<p>
The type of an iterator to the beginning of a sequence of type <tt class="computeroutput"><span class="identifier">Seq</span></tt>
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">sequence</span><span class="special">::</span><span class="keyword">template</span> <span class="identifier">begin</span><span class="special">&lt;</span><span class="identifier">Seq</span><span class="special">&gt;::</span><span class="identifier">call</span><span class="special">(</span><span class="identifier">seq</span><span class="special">)</span></tt>
</p>
</td>
<td>
<p>
An iterator to the beginning of sequence <tt class="computeroutput"><span class="identifier">seq</span></tt>
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">sequence</span><span class="special">::</span><span class="keyword">template</span> <span class="identifier">end</span><span class="special">&lt;</span><span class="identifier">Seq</span><span class="special">&gt;::</span><span class="identifier">type</span></tt>
</p>
</td>
<td>
<p>
The type of an iterator to the end of a sequence of type <tt class="computeroutput"><span class="identifier">Seq</span></tt>
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">sequence</span><span class="special">::</span><span class="keyword">template</span> <span class="identifier">end</span><span class="special">&lt;</span><span class="identifier">Seq</span><span class="special">&gt;::</span><span class="identifier">call</span><span class="special">(</span><span class="identifier">seq</span><span class="special">)</span></tt>
</p>
</td>
<td>
<p>
An iterator to the end of sequence <tt class="computeroutput"><span class="identifier">seq</span></tt>
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">sequence</span><span class="special">::</span><span class="keyword">template</span> <span class="identifier">size</span><span class="special">&lt;</span><span class="identifier">Seq</span><span class="special">&gt;::</span><span class="identifier">type</span></tt>
</p>
</td>
<td>
<p>
The size of a sequence of type <tt class="computeroutput"><span class="identifier">Seq</span></tt>
as an <a href="http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target="_top">MPL
Integral Constant</a>
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">sequence</span><span class="special">::</span><span class="keyword">template</span> <span class="identifier">size</span><span class="special">&lt;</span><span class="identifier">Seq</span><span class="special">&gt;::</span><span class="identifier">call</span><span class="special">(</span><span class="identifier">seq</span><span class="special">)</span></tt>
</p>
</td>
<td>
<p>
The size of sequence <tt class="computeroutput"><span class="identifier">seq</span></tt>
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">sequence</span><span class="special">::</span><span class="keyword">template</span> <span class="identifier">at</span><span class="special">&lt;</span><span class="identifier">Seq</span><span class="special">,</span> <span class="identifier">N</span><span class="special">&gt;::</span><span class="identifier">type</span></tt>
</p>
</td>
<td>
<p>
The type of element <tt class="computeroutput"><span class="identifier">N</span></tt>
in a sequence of type <tt class="computeroutput"><span class="identifier">Seq</span></tt>
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">sequence</span><span class="special">::</span><span class="keyword">template</span> <span class="identifier">at</span><span class="special">&lt;</span><span class="identifier">Seq</span><span class="special">,</span> <span class="identifier">N</span><span class="special">&gt;::</span><span class="identifier">call</span><span class="special">(</span><span class="identifier">seq</span><span class="special">)</span></tt>
</p>
</td>
<td>
<p>
Element <tt class="computeroutput"><span class="identifier">N</span></tt> in sequence
<tt class="computeroutput"><span class="identifier">seq</span></tt>
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">sequence</span><span class="special">::</span><span class="keyword">template</span> <span class="identifier">value_at</span><span class="special">&lt;</span><span class="identifier">Sequence</span><span class="special">,</span> <span class="identifier">N</span><span class="special">&gt;::</span><span class="identifier">type</span></tt>
</p>
</td>
<td>
<p>
The type of the <tt class="computeroutput"><span class="identifier">N</span></tt>th
element in a sequence of type <tt class="computeroutput"><span class="identifier">Seq</span></tt>
</p>
</td>
</tr>
</tbody>
</table>
</div>
<a name="fusion.extension.sequence_facade.include"></a><h4>
<a name="id647663"></a>
<a href="sequence_facade.html#fusion.extension.sequence_facade.include">Include</a>
</h4>
<pre class="programlisting">
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">sequence</span><span class="special">/</span><span class="identifier">sequence_facade</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">include</span><span class="special">/</span><span class="identifier">sequence_facade</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<a name="fusion.extension.sequence_facade.example"></a><h4>
<a name="id647821"></a>
<a href="sequence_facade.html#fusion.extension.sequence_facade.example">Example</a>
</h4>
<p>
A full worked example using <a href="sequence_facade.html" title="Sequence Facade"><tt class="computeroutput"><span class="identifier">sequence_facade</span></tt></a> is provided in triple.cpp
in the extension examples.
</p>
</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"><small>Copyright © 2001-2007 Joel de Guzman, Dan Marsden, Tobias
Schwinger<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></small></div></td>
</tr></table>
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