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Eric Niebler 48b5e30df8 Merged revisions 42067-42179 via svnmerge from 
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  r42067 | johnmaddock | 2007-12-15 04:32:18 -0800 (Sat, 15 Dec 2007) | 1 line
  
  MSVC warning suppression.
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  r42069 | bemandawes | 2007-12-15 06:26:16 -0800 (Sat, 15 Dec 2007) | 1 line
  
  Correct misspelling of library name
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  r42074 | johnmaddock | 2007-12-15 09:10:03 -0800 (Sat, 15 Dec 2007) | 1 line
  
  Fix error messages so they work with Boost.Format.
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  r42076 | johnmaddock | 2007-12-15 09:36:31 -0800 (Sat, 15 Dec 2007) | 1 line
  
  Trivial patches to silence MSVC warnings.
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  r42078 | johnmaddock | 2007-12-15 10:29:29 -0800 (Sat, 15 Dec 2007) | 1 line
  
  Disable long double tests if there's no long double support.
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  r42080 | johnmaddock | 2007-12-15 10:49:13 -0800 (Sat, 15 Dec 2007) | 1 line
  
  Yet another MSVC warning suppression.
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  r42082 | bgubenko | 2007-12-15 10:53:01 -0800 (Sat, 15 Dec 2007) | 1 line
  
  mark up Boost.Test tests for Linux ia64 gcc; make Boost.Interprocess unsupported on Linux ia64 gcc and PA-RISC
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  r42086 | anthonyw | 2007-12-15 14:34:30 -0800 (Sat, 15 Dec 2007) | 1 line
  
  added timed_wait overloads that take a duration
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  r42087 | anthonyw | 2007-12-15 14:36:43 -0800 (Sat, 15 Dec 2007) | 1 line
  
  explicit move functions for threads, with a test
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  r42105 | andreas_huber69 | 2007-12-16 06:58:24 -0800 (Sun, 16 Dec 2007) | 1 line
  
  Removed markup for now passing Sandia tests.
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  r42112 | bemandawes | 2007-12-16 14:39:32 -0800 (Sun, 16 Dec 2007) | 1 line
  
  Add intel-win-10.0 as required
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  r42116 | djowel | 2007-12-17 01:27:42 -0800 (Mon, 17 Dec 2007) | 1 line
  
  fixed documentation bug
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  r42117 | anthonyw | 2007-12-17 03:24:13 -0800 (Mon, 17 Dec 2007) | 1 line
  
  Updated move function test to be fair to Borland
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  r42118 | anthonyw | 2007-12-17 04:52:50 -0800 (Mon, 17 Dec 2007) | 1 line
  
  boost::move support for locks
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  r42119 | chris_kohlhoff | 2007-12-17 05:04:30 -0800 (Mon, 17 Dec 2007) | 2 lines
  
  Fixes for older HP-UX.
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  r42120 | chris_kohlhoff | 2007-12-17 05:08:10 -0800 (Mon, 17 Dec 2007) | 2 lines
  
  Bump version number.
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  r42121 | chris_kohlhoff | 2007-12-17 05:17:46 -0800 (Mon, 17 Dec 2007) | 2 lines
  
  Documentation fixes.
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  r42127 | bgubenko | 2007-12-17 10:06:11 -0800 (Mon, 17 Dec 2007) | 1 line
  
  markup test library test prg_exec_fail2 for PA-RISC
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  r42138 | johnmaddock | 2007-12-18 08:37:23 -0800 (Tue, 18 Dec 2007) | 1 line
  
  Fixes #1525.
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  r42141 | marshall | 2007-12-18 10:33:55 -0800 (Tue, 18 Dec 2007) | 1 line
  
  Patches to fixe #1423 and #1473
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  r42145 | fmhess | 2007-12-18 12:14:01 -0800 (Tue, 18 Dec 2007) | 4 lines
  
  Prevented "classname"/"methodname"/etc. elements inside "type" elements 
  inside "static-constant" elements from getting dropped.
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  r42164 | djowel | 2007-12-19 02:33:14 -0800 (Wed, 19 Dec 2007) | 1 line
  
  bug fix for end_impl.
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  r42165 | djowel | 2007-12-19 02:33:39 -0800 (Wed, 19 Dec 2007) | 1 line
  
  bug fix for end_impl. (test)
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  r42166 | anthonyw | 2007-12-19 02:39:45 -0800 (Wed, 19 Dec 2007) | 1 line
  
  Updated thread ID, and added tests
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  r42167 | djowel | 2007-12-19 02:42:04 -0800 (Wed, 19 Dec 2007) | 1 line
  
  tweakbug fix for end_impl (tweak).
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  r42168 | anthonyw | 2007-12-19 02:45:01 -0800 (Wed, 19 Dec 2007) | 1 line
  
  Implement hardware_concurrency for pthread
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  r42169 | johnmaddock | 2007-12-19 08:41:54 -0800 (Wed, 19 Dec 2007) | 1 line
  
  Fix graph title.
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[SVN r42185]
2007-12-19 22:46:16 +00:00

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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>cons</title>
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</div>
<div class="section" lang="en">
<div class="titlepage"><div><div><h3 class="title">
<a name="fusion.container.cons"></a><a href="cons.html" title="cons">cons</a></h3></div></div></div>
<a name="fusion.container.cons.description"></a><h4>
<a name="id530553"></a>
<a href="cons.html#fusion.container.cons.description">Description</a>
</h4>
<p>
<tt class="computeroutput"><span class="identifier">cons</span></tt> is a simple <a href="../sequence/concepts/forward_sequence.html" title="Forward
Sequence">Forward
Sequence</a>. It is a lisp style recursive list structure where <tt class="computeroutput"><span class="identifier">car</span></tt> is the <span class="emphasis"><em>head</em></span> and
<tt class="computeroutput"><span class="identifier">cdr</span></tt> is the <span class="emphasis"><em>tail</em></span>:
usually another cons structure or <tt class="computeroutput"><span class="identifier">nil</span></tt>:
the empty list. Fusion's <a href="list.html" title="list"><tt class="computeroutput"><span class="identifier">list</span></tt></a> is built on top of this more
primitive data structure. It is more efficient than <a href="vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a> when the target sequence
is constructed piecemeal (a data at a time). The runtime cost of access to
each element is peculiarly constant (see <a href="../notes.html#fusion.notes.recursive_inlined_functions">Recursive
Inlined Functions</a>).
</p>
<a name="fusion.container.cons.header"></a><h4>
<a name="id530698"></a>
<a href="cons.html#fusion.container.cons.header">Header</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">container</span><span class="special">/</span><span class="identifier">list</span><span class="special">/</span><span class="identifier">cons</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">cons</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<a name="fusion.container.cons.synopsis"></a><h4>
<a name="id530866"></a>
<a href="cons.html#fusion.container.cons.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">Car</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Cdr</span> <span class="special">=</span> <span class="identifier">nil</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">cons</span><span class="special">;</span>
</pre>
<a name="fusion.container.cons.template_parameters"></a><h4>
<a name="id530974"></a>
<a href="cons.html#fusion.container.cons.template_parameters">Template parameters</a>
</h4>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Parameter
</p>
</th>
<th>
<p>
Description
</p>
</th>
<th>
<p>
Default
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">Car</span></tt>
</p>
</td>
<td>
<p>
Head type
</p>
</td>
<td>
<p>
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">Cdr</span></tt>
</p>
</td>
<td>
<p>
Tail type
</p>
</td>
<td>
<p>
<tt class="computeroutput"><span class="identifier">nil</span></tt>
</p>
</td>
</tr>
</tbody>
</table></div>
<a name="fusion.container.cons.model_of"></a><h4>
<a name="id531124"></a>
<a href="cons.html#fusion.container.cons.model_of">Model of</a>
</h4>
<div class="itemizedlist"><ul type="disc"><li><a href="../sequence/concepts/forward_sequence.html" title="Forward
Sequence">Forward Sequence</a></li></ul></div>
<div class="variablelist">
<p class="title"><b>Notation</b></p>
<dl>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">nil</span></tt></span></dt>
<dd><p>
An empty <tt class="computeroutput"><span class="identifier">cons</span></tt>
</p></dd>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">C</span></tt></span></dt>
<dd><p>
A <tt class="computeroutput"><span class="identifier">cons</span></tt> type
</p></dd>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">l</span></tt>,
<tt class="computeroutput"><span class="identifier">l2</span></tt></span></dt>
<dd><p>
Instances of <tt class="computeroutput"><span class="identifier">cons</span></tt>
</p></dd>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">car</span></tt></span></dt>
<dd><p>
An arbitrary data
</p></dd>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">cdr</span></tt></span></dt>
<dd><p>
Another <tt class="computeroutput"><span class="identifier">cons</span></tt> list
</p></dd>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">s</span></tt></span></dt>
<dd><p>
A <a href="../sequence/concepts/forward_sequence.html" title="Forward
Sequence">Forward Sequence</a>
</p></dd>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">N</span></tt></span></dt>
<dd><p>
An <a href="http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target="_top">MPL
Integral Constant</a>
</p></dd>
</dl>
</div>
<a name="fusion.container.cons.expression_semantics"></a><h4>
<a name="id531405"></a>
<a href="cons.html#fusion.container.cons.expression_semantics">Expression Semantics</a>
</h4>
<p>
Semantics of an expression is defined only where it differs from, or is not
defined in <a href="../sequence/concepts/forward_sequence.html" title="Forward
Sequence">Forward
Sequence</a>.
</p>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Expression
</p>
</th>
<th>
<p>
Semantics
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">nil</span><span class="special">()</span></tt>
</p>
</td>
<td>
<p>
Creates an empty list.
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">C</span><span class="special">()</span></tt>
</p>
</td>
<td>
<p>
Creates a cons with default constructed elements.
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">C</span><span class="special">(</span><span class="identifier">car</span><span class="special">)</span></tt>
</p>
</td>
<td>
<p>
Creates a cons with <tt class="computeroutput"><span class="identifier">car</span></tt>
head and default constructed tail.
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">C</span><span class="special">(</span><span class="identifier">car</span><span class="special">,</span>
<span class="identifier">cdr</span><span class="special">)</span></tt>
</p>
</td>
<td>
<p>
Creates a cons with <tt class="computeroutput"><span class="identifier">car</span></tt>
head and <tt class="computeroutput"><span class="identifier">cdr</span></tt> tail.
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">C</span><span class="special">(</span><span class="identifier">s</span><span class="special">)</span></tt>
</p>
</td>
<td>
<p>
Copy constructs a cons from a <a href="../sequence/concepts/forward_sequence.html" title="Forward
Sequence">Forward
Sequence</a>, <tt class="computeroutput"><span class="identifier">s</span></tt>.
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><span class="identifier">l</span> <span class="special">=</span>
<span class="identifier">s</span></tt>
</p>
</td>
<td>
<p>
Assigns to a cons, <tt class="computeroutput"><span class="identifier">l</span></tt>,
from a <a href="../sequence/concepts/forward_sequence.html" title="Forward
Sequence">Forward
Sequence</a>, <tt class="computeroutput"><span class="identifier">s</span></tt>.
</p>
</td>
</tr>
<tr>
<td>
<p>
<tt class="computeroutput"><a href="../sequence/intrinsic/functions/at.html" title="at"><tt class="computeroutput"><span class="identifier">at</span></tt></a><span class="special">&lt;</span><span class="identifier">N</span><span class="special">&gt;(</span><span class="identifier">l</span><span class="special">)</span></tt>
</p>
</td>
<td>
<p>
The Nth element from the beginning of the sequence; see <a href="../sequence/intrinsic/functions/at.html" title="at"><tt class="computeroutput"><span class="identifier">at</span></tt></a>.
</p>
</td>
</tr>
</tbody>
</table></div>
<div class="sidebar"><p>
<span class="inlinemediaobject"><img src="../../images/note.png" alt="note"></span> <tt class="computeroutput"><a href="../sequence/intrinsic/functions/at.html" title="at"><tt class="computeroutput"><span class="identifier">at</span></tt></a><span class="special">&lt;</span><span class="identifier">N</span><span class="special">&gt;(</span><span class="identifier">l</span><span class="special">)</span></tt> is provided
for convenience and compatibility with the original <a href="http://www.boost.org/libs/tuple/doc/tuple_users_guide.html" target="_top">Boost.Tuple</a>
library, despite <tt class="computeroutput"><span class="identifier">cons</span></tt> being
a <a href="../sequence/concepts/forward_sequence.html" title="Forward
Sequence">Forward Sequence</a>
only (<tt class="computeroutput"><span class="identifier">at</span></tt> is supposed to be
a <a href="../sequence/concepts/random_access_sequence.html" title="Random
Access Sequence">Random
Access Sequence</a> requirement). The runtime complexity of <a href="../sequence/intrinsic/functions/at.html" title="at"><tt class="computeroutput"><span class="identifier">at</span></tt></a> is constant (see <a href="../notes.html#fusion.notes.recursive_inlined_functions">Recursive
Inlined Functions</a>).
</p></div>
<a name="fusion.container.cons.example"></a><h4>
<a name="id532055"></a>
<a href="cons.html#fusion.container.cons.example">Example</a>
</h4>
<pre class="programlisting">
<span class="identifier">cons</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">cons</span><span class="special">&lt;</span><span class="keyword">float</span><span class="special">&gt;</span> <span class="special">&gt;</span> <span class="identifier">l</span><span class="special">(</span><span class="number">12</span><span class="special">,</span> <span class="identifier">cons</span><span class="special">&lt;</span><span class="keyword">float</span><span class="special">&gt;(</span><span class="number">5.5f</span><span class="special">));</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <a href="../sequence/intrinsic/functions/at_c.html" title="at_c"><tt class="computeroutput"><span class="identifier">at_c</span></tt></a><span class="special">&lt;</span><span class="number">0</span><span class="special">&gt;(</span><span class="identifier">l</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <a href="../sequence/intrinsic/functions/at_c.html" title="at_c"><tt class="computeroutput"><span class="identifier">at_c</span></tt></a><span class="special">&lt;</span><span class="number">1</span><span class="special">&gt;(</span><span class="identifier">l</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
</pre>
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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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