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  • Committer: Bazaar Package Importer
  • Author(s): Steve M. Robbins
  • Date: 2011-03-13 00:37:35 UTC
  • mfrom: (1.1.1 upstream)
  • Revision ID: james.westby@ubuntu.com-20110313003735-r7j6jdk0hkywfzuw
Tags: 1.46.1-1
http://bugs.debian.org/615849
* New upstream.

* control: Add libboost-random1.46-dev to depends of -all-dev and
  suggests of -dev.  Closes: #615849.

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<html>
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<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
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<title>Function template optional</title>
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<link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset">
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<link rel="up" href="../../xpressive/reference.html#header.boost.xpressive.regex_primitives_hpp" title="Header &lt;boost/xpressive/regex_primitives.hpp&gt;">
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<link rel="prev" href="range.html" title="Function template range">
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<link rel="next" href="repeat_id1559469.html" title="Function template repeat">
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<table cellpadding="2" width="100%"><tr>
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<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../boost.png"></td>
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<td align="center"><a href="../../../../index.html">Home</a></td>
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<a accesskey="p" href="range.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../xpressive/reference.html#header.boost.xpressive.regex_primitives_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="repeat_id1559469.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a>
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<a name="boost.xpressive.optional_id1559438"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle">Function template optional</span></h2>
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<p>boost::xpressive::optional &#8212; Make a sub-expression optional. Equivalent to !as_xpr(expr). </p>
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</div>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
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<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="../../xpressive/reference.html#header.boost.xpressive.regex_primitives_hpp" title="Header &lt;boost/xpressive/regex_primitives.hpp&gt;">boost/xpressive/regex_primitives.hpp</a>&gt;
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<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">&gt;</span> 
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  <span class="identifier">proto</span><span class="special">::</span><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">make_expr</span><span class="special">&lt;</span> <span class="identifier">proto</span><span class="special">::</span><span class="identifier">tag</span><span class="special">::</span><span class="identifier">logical_not</span><span class="special">,</span> <span class="identifier">proto</span><span class="special">::</span><span class="identifier">default_domain</span><span class="special">,</span> <span class="identifier">Expr</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> <span class="keyword">const</span> 
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  <span class="identifier">optional</span><span class="special">(</span><span class="identifier">Expr</span> <span class="keyword">const</span> <span class="special">&amp;</span> expr<span class="special">)</span><span class="special">;</span></pre></div>
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<div class="refsect1">
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<a name="id3348257"></a><h2>Description</h2>
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<div class="variablelist"><table border="0">
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<td><p><span class="term">Parameters:</span></p></td>
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<td><p><span class="term"><code class="computeroutput">expr</code></span></p></td>
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<td><p>The sub-expression to make optional. </p></td>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2007 Eric Niebler<p>
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        Distributed under the Boost Software License, Version 1.0. (See accompanying
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        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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      </p>
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