forked from boostorg/regex
Initial commit of quickbook generated docs.
[SVN r37943]
This commit is contained in:
John Maddock
558
doc/html/boost_regex/background_information/standards.html
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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>
|
||||
<link rel="stylesheet" href="../../../../../../doc/html/boostbook.css" type="text/css">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot_2006-12-17_0120">
|
||||
<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">
|
||||
</head>
|
||||
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
||||
<table cellpadding="2" width="100%">
|
||||
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td>
|
||||
<td align="center"><a href="../../../../../../index.htm">Home</a></td>
|
||||
<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td>
|
||||
<td align="center"><a href="../../../../../../people/people.htm">People</a></td>
|
||||
<td align="center"><a href="../../../../../../more/faq.htm">FAQ</a></td>
|
||||
<td align="center"><a href="../../../../../../more/index.htm">More</a></td>
|
||||
</table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
|
||||
<a accesskey="p" href="performance.html"><img src="../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../background_information.html"><img src="../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="redist.html"><img src="../../../../../../doc/html/images/next.png" alt="Next"></a>
|
||||
</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="id658772"></a>
|
||||
<a href="standards.html#boost_regex.background_information.standards.c__">C++</a>
|
||||
</h5>
|
||||
<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="id658812"></a>
|
||||
<a href="standards.html#boost_regex.background_information.standards.ecmascript___javascript">ECMAScript
|
||||
/ JavaScript</a>
|
||||
</h5>
|
||||
<p>
|
||||
All of the ECMAScript regular expression syntax features are supported, except
|
||||
that:
|
||||
</p>
|
||||
<p>
|
||||
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="id658853"></a>
|
||||
<a href="standards.html#boost_regex.background_information.standards.perl">Perl</a>
|
||||
</h5>
|
||||
<p>
|
||||
Almost all Perl features are supported, except for:
|
||||
</p>
|
||||
<p>
|
||||
(?{code}) Not implementable in a compiled strongly typed language.
|
||||
</p>
|
||||
<p>
|
||||
(??{code}) Not implementable in a compiled strongly typed language.
|
||||
</p>
|
||||
<a name="boost_regex.background_information.standards.posix"></a><h5>
|
||||
<a name="id658894"></a>
|
||||
<a href="standards.html#boost_regex.background_information.standards.posix">POSIX</a>
|
||||
</h5>
|
||||
<p>
|
||||
All the POSIX basic and extended regular expression features are supported,
|
||||
except that:
|
||||
</p>
|
||||
<p>
|
||||
No character collating names are recognized except those specified in the
|
||||
POSIX standard for the C locale, unless they are explicitly registered with
|
||||
the traits class.
|
||||
</p>
|
||||
<p>
|
||||
Character equivalence classes ( [[=a=]] etc) are probably buggy except on
|
||||
Win32. Implementing this feature requires knowledge of the format of the
|
||||
string sort keys produced by the system; if you need this, and the default
|
||||
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="id658939"></a>
|
||||
<a href="standards.html#boost_regex.background_information.standards.unicode">Unicode</a>
|
||||
</h5>
|
||||
<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>.
|
||||
</p>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup>
|
||||
<col>
|
||||
<col>
|
||||
<col>
|
||||
</colgroup>
|
||||
<thead><tr>
|
||||
<th>
|
||||
<p>
|
||||
Item
|
||||
</p>
|
||||
</th>
|
||||
<th>
|
||||
<p>
|
||||
Feature
|
||||
</p>
|
||||
</th>
|
||||
<th>
|
||||
<p>
|
||||
Support
|
||||
</p>
|
||||
</th>
|
||||
</tr></thead>
|
||||
<tbody>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
1.1
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Hex Notation
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Yes: use \x{DDDD} to refer to code point UDDDD.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
1.2
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Character Properties
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
All the names listed under the General Category Property are supported.
|
||||
Script names and Other Names are not currently supported.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
1.3
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Subtraction and Intersection
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
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>
|
||||
</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>
|
||||
</p>
|
||||
<p>
|
||||
Gives everything in Y that is not in X (subtraction).
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
1.4
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Simple Word Boundaries
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Conforming: non-spacing marks are included in the set of word characters.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
1.5
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Caseless Matching
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Supported, note that at this level, case transformations are 1:1,
|
||||
many to many case folding operations are not supported (for example
|
||||
"<22>" to "SS").
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
1.6
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Line Boundaries
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Supported, except that "." matches only one character of
|
||||
"\r\n". Other than that word boundaries match correctly;
|
||||
including not matching in the middle of a "\r\n" sequence.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
1.7
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Code Points
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Supported: provided you use the u32* algorithms, then UTF-8, UTF-16
|
||||
and UTF-32 are all treated as sequences of 32-bit code points.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
2.1
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Canonical Equivalence
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Not supported: it is up to the user of the library to convert all
|
||||
text into the same canonical form as the regular expression.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
2.2
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Default Grapheme Clusters
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Not supported.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
2.3Default Word Boundaries
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Not supported.
|
||||
</p>
|
||||
</td>
|
||||
<td class="auto-generated"><EFBFBD></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
2.4
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Default Loose Matches
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Not Supported.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
2.5
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Named Properties
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Supported: the expression "[[:name:]]" or \N{name} matches
|
||||
the named character "name".
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
2.6
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Wildcard properties
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Not Supported.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
3.1
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Tailored Punctuation.
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Not Supported.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
3.2
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Tailored Grapheme Clusters
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Not Supported.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
3.3
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Tailored Word Boundaries.
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Not Supported.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
3.4
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Tailored Loose Matches
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Partial support: [[=c=]] matches characters with the same primary
|
||||
equivalence class as "c".
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
3.5
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Tailored Ranges
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Supported: [a-b] matches any character that collates in the range
|
||||
a to b, when the expression is constructed with the collate flag
|
||||
set.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
3.6
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Context Matches
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Not Supported.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
3.7
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Incremental Matches
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Supported: pass the flag <code class="computeroutput"><span class="identifier">match_partial</span></code>
|
||||
to the regex algorithms.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
3.8
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Unicode Set Sharing
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Not Supported.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
3.9
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Possible Match Sets
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Not supported, however this information is used internally to optimise
|
||||
the matching of regular expressions, and return quickly if no match
|
||||
is possible.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
3.10
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Folded Matching
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Partial Support: It is possible to achieve a similar effect by using
|
||||
a custom regular expression traits class.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p>
|
||||
3.11
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Custom Submatch Evaluation
|
||||
</p>
|
||||
</td>
|
||||
<td>
|
||||
<p>
|
||||
Not Supported.
|
||||
</p>
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table></div>
|
||||
</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>
|
||||
</tr></table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
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<a accesskey="p" href="performance.html"><img src="../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../background_information.html"><img src="../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="redist.html"><img src="../../../../../../doc/html/images/next.png" alt="Next"></a>
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</div>
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</body>
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</html>
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Reference in New Issue
Block a user