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Joel de Guzman
2007-11-07 03:23:31 +00:00
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doc/html/boost_regex/background_information/standards.html
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Standards Conformance</title>
<title> Standards
Conformance</title>
<link rel="stylesheet" href="../../../../../../doc/html/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot_2006-12-17_0120">
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
<link rel="start" href="../../index.html" title="Boost.Regex">
<link rel="up" href="../background_information.html" title="Background Information">
<link rel="prev" href="performance.html" title="Performance">
<link rel="next" href="redist.html" title="Redistributables">
<link rel="prev" href="performance.html" title=" Performance">
<link rel="next" href="redist.html" title=" Redistributables">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
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</div>
<div class="section" lang="en">
<div class="titlepage"><div><div><h3 class="title">
<a name="boost_regex.background_information.standards"></a><a href="standards.html" title="Standards Conformance"> Standards
Conformance</a>
</h3></div></div></div>
<a name="boost_regex.background_information.standards.c__"></a><h5>
<a name="id648931"></a>
<a name="boost_regex.background_information.standards"></a><a href="standards.html" title=" Standards
Conformance"> Standards
Conformance</a></h3></div></div></div>
<a name="boost_regex.background_information.standards.c__"></a><h4>
<a name="id615703"></a>
<a href="standards.html#boost_regex.background_information.standards.c__">C++</a>
</h5>
</h4>
<p>
Boost.Regex is intended to conform to the <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf" target="_top">Technical
Report on C++ Library Extensions</a>.
</p>
<a name="boost_regex.background_information.standards.ecmascript___javascript"></a><h5>
<a name="id648969"></a>
<a name="boost_regex.background_information.standards.ecmascript___javascript"></a><h4>
<a name="id615743"></a>
<a href="standards.html#boost_regex.background_information.standards.ecmascript___javascript">ECMAScript
/ JavaScript</a>
</h5>
</h4>
<p>
All of the ECMAScript regular expression syntax features are supported, except
that:
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The escape sequence \u matches any upper case character (the same as [[:upper:]])
rather than a Unicode escape sequence; use \x{DDDD} for Unicode escape sequences.
</p>
<a name="boost_regex.background_information.standards.perl"></a><h5>
<a name="id649008"></a>
<a name="boost_regex.background_information.standards.perl"></a><h4>
<a name="id615784"></a>
<a href="standards.html#boost_regex.background_information.standards.perl">Perl</a>
</h5>
</h4>
<p>
Almost all Perl features are supported, except for:
</p>
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<p>
(??{code}) Not implementable in a compiled strongly typed language.
</p>
<a name="boost_regex.background_information.standards.posix"></a><h5>
<a name="id649047"></a>
<a name="boost_regex.background_information.standards.posix"></a><h4>
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<a href="standards.html#boost_regex.background_information.standards.posix">POSIX</a>
</h5>
</h4>
<p>
All the POSIX basic and extended regular expression features are supported,
except that:
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implementation doesn't work on your platform, then you will need to supply
a custom traits class.
</p>
<a name="boost_regex.background_information.standards.unicode"></a><h5>
<a name="id649094"></a>
<a name="boost_regex.background_information.standards.unicode"></a><h4>
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<a href="standards.html#boost_regex.background_information.standards.unicode">Unicode</a>
</h5>
</h4>
<p>
The following comments refer to <a href="http://unicode.org/reports/tr18/" target="_top">Unicode
Technical Standard #18: Unicode Regular Expressions version 11</a>.
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Indirectly support by forward-lookahead:
</p>
<p>
<code class="computeroutput"><span class="special">(?=[[:</span><span class="identifier">X</span><span class="special">:]])[[:</span><span class="identifier">Y</span><span class="special">:]]</span></code>
<tt class="computeroutput"><span class="special">(?=[[:</span><span class="identifier">X</span><span class="special">:]])[[:</span><span class="identifier">Y</span><span class="special">:]]</span></tt>
</p>
<p>
Gives the intersection of character properties X and Y.
</p>
<p>
<code class="computeroutput"><span class="special">(?![[:</span><span class="identifier">X</span><span class="special">:]])[[:</span><span class="identifier">Y</span><span class="special">:]]</span></code>
<tt class="computeroutput"><span class="special">(?![[:</span><span class="identifier">X</span><span class="special">:]])[[:</span><span class="identifier">Y</span><span class="special">:]]</span></tt>
</p>
<p>
Gives everything in Y that is not in X (subtraction).
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</td>
<td>
<p>
Supported: pass the flag <code class="computeroutput"><span class="identifier">match_partial</span></code>
Supported: pass the flag <tt class="computeroutput"><span class="identifier">match_partial</span></tt>
to the regex algorithms.
</p>
</td>
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</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><small>Copyright <20> 2007 John Maddock</small></td>
<td align="right"><div class="copyright-footer"><small>Copyright <20> 2007 John Maddock<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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