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<title>POSIX Extended Regular Expression Syntax</title>
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-<div class="section boost_regex_syntax_basic_extended">
+<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="boost_regex.syntax.basic_extended"></a><a class="link" href="basic_extended.html" title="POSIX Extended Regular Expression Syntax">POSIX Extended Regular
Expression Syntax</a>
</h3></div></div></div>
<h4>
<a name="boost_regex.syntax.basic_extended.h0"></a>
- <span><a name="boost_regex.syntax.basic_extended.synopsis"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.synopsis">Synopsis</a>
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.synopsis"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.synopsis">Synopsis</a>
</h4>
<p>
The POSIX-Extended regular expression syntax is supported by the POSIX C
</pre>
<a name="boost_regex.posix_extended_syntax"></a><h4>
<a name="boost_regex.syntax.basic_extended.h1"></a>
- <span><a name="boost_regex.syntax.basic_extended.posix_extended_syntax"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.posix_extended_syntax">POSIX Extended
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.posix_extended_syntax"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.posix_extended_syntax">POSIX Extended
Syntax</a>
</h4>
<p>
<pre class="programlisting">.[{}()\*+?|^$</pre>
<h5>
<a name="boost_regex.syntax.basic_extended.h2"></a>
- <span><a name="boost_regex.syntax.basic_extended.wildcard_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.wildcard_">Wildcard:</a>
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.wildcard_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.wildcard_">Wildcard:</a>
</h5>
<p>
The single character '.' when used outside of a character set will match
any single character except:
</p>
-<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
The NULL character when the flag <code class="computeroutput"><span class="identifier">match_no_dot_null</span></code>
is passed to the matching algorithms.
</ul></div>
<h5>
<a name="boost_regex.syntax.basic_extended.h3"></a>
- <span><a name="boost_regex.syntax.basic_extended.anchors_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.anchors_">Anchors:</a>
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.anchors_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.anchors_">Anchors:</a>
</h5>
<p>
A '^' character shall match the start of a line when used as the first character
</p>
<h5>
<a name="boost_regex.syntax.basic_extended.h4"></a>
- <span><a name="boost_regex.syntax.basic_extended.marked_sub_expressions_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.marked_sub_expressions_">Marked
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.marked_sub_expressions_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.marked_sub_expressions_">Marked
sub-expressions:</a>
</h5>
<p>
</p>
<h5>
<a name="boost_regex.syntax.basic_extended.h5"></a>
- <span><a name="boost_regex.syntax.basic_extended.repeats_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.repeats_">Repeats:</a>
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.repeats_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.repeats_">Repeats:</a>
</h5>
<p>
Any atom (a single character, a marked sub-expression, or a character class)
</p>
<h5>
<a name="boost_regex.syntax.basic_extended.h6"></a>
- <span><a name="boost_regex.syntax.basic_extended.back_references_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.back_references_">Back
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.back_references_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.back_references_">Back
references:</a>
</h5>
<p>
</table></div>
<h5>
<a name="boost_regex.syntax.basic_extended.h7"></a>
- <span><a name="boost_regex.syntax.basic_extended.alternation"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.alternation">Alternation</a>
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.alternation"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.alternation">Alternation</a>
</h5>
<p>
The <code class="computeroutput"><span class="special">|</span></code> operator will match either
</p>
<h5>
<a name="boost_regex.syntax.basic_extended.h8"></a>
- <span><a name="boost_regex.syntax.basic_extended.character_sets_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.character_sets_">Character
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.character_sets_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.character_sets_">Character
sets:</a>
</h5>
<p>
</p>
<h6>
<a name="boost_regex.syntax.basic_extended.h9"></a>
- <span><a name="boost_regex.syntax.basic_extended.single_characters_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.single_characters_">Single characters:</a>
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.single_characters_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.single_characters_">Single characters:</a>
</h6>
<p>
For example <code class="computeroutput"><span class="special">[</span><span class="identifier">abc</span><span class="special">]</span></code>, will match any of the characters 'a', 'b',
</p>
<h6>
<a name="boost_regex.syntax.basic_extended.h10"></a>
- <span><a name="boost_regex.syntax.basic_extended.character_ranges_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.character_ranges_">Character
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.character_ranges_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.character_ranges_">Character
ranges:</a>
</h6>
<p>
</p>
<h6>
<a name="boost_regex.syntax.basic_extended.h11"></a>
- <span><a name="boost_regex.syntax.basic_extended.negation_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.negation_">Negation:</a>
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.negation_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.negation_">Negation:</a>
</h6>
<p>
If the bracket-expression begins with the ^ character, then it matches the
</p>
<h6>
<a name="boost_regex.syntax.basic_extended.h12"></a>
- <span><a name="boost_regex.syntax.basic_extended.character_classes_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.character_classes_">Character
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.character_classes_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.character_classes_">Character
classes:</a>
</h6>
<p>
</p>
<h6>
<a name="boost_regex.syntax.basic_extended.h13"></a>
- <span><a name="boost_regex.syntax.basic_extended.collating_elements_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.collating_elements_">Collating
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.collating_elements_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.collating_elements_">Collating
Elements:</a>
</h6>
<p>
</p>
<h6>
<a name="boost_regex.syntax.basic_extended.h14"></a>
- <span><a name="boost_regex.syntax.basic_extended.equivalence_classes_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.equivalence_classes_">Equivalence
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.equivalence_classes_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.equivalence_classes_">Equivalence
classes:</a>
</h6>
<p>
An expression of the form <code class="computeroutput"><span class="special">[[=</span><span class="identifier">col</span><span class="special">=]]</span></code>,
matches any character or collating element whose primary sort key is the
- same as that for collating element <span class="emphasis"><em>col</em></span>, as with colating
+ same as that for collating element <span class="emphasis"><em>col</em></span>, as with collating
elements the name <span class="emphasis"><em>col</em></span> may be a <a class="link" href="collating_names.html" title="Collating Names">symbolic
name</a>. A primary sort key is one that ignores case, accentation, or
locale-specific tailorings; so for example <code class="computeroutput"><span class="special">[[=</span><span class="identifier">a</span><span class="special">=]]</span></code> matches
</p>
<h6>
<a name="boost_regex.syntax.basic_extended.h15"></a>
- <span><a name="boost_regex.syntax.basic_extended.combinations_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.combinations_">Combinations:</a>
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.combinations_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.combinations_">Combinations:</a>
</h6>
<p>
All of the above can be combined in one character set declaration, for example:
</p>
<h5>
<a name="boost_regex.syntax.basic_extended.h16"></a>
- <span><a name="boost_regex.syntax.basic_extended.escapes"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.escapes">Escapes</a>
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.escapes"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.escapes">Escapes</a>
</h5>
<p>
The POSIX standard defines no escape sequences for POSIX-Extended regular
expressions, except that:
</p>
-<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Any special character preceded by an escape shall match itself.
</li>
</p>
<h6>
<a name="boost_regex.syntax.basic_extended.h17"></a>
- <span><a name="boost_regex.syntax.basic_extended.escapes_matching_a_specific_character"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.escapes_matching_a_specific_character">Escapes
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.escapes_matching_a_specific_character"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.escapes_matching_a_specific_character">Escapes
matching a specific character</a>
</h6>
<p>
</td>
<td>
<p>
- Matches the single character which has the symbolic name name.
+ Matches the single character which has the symbolic name <span class="emphasis"><em>Name</em></span>.
For example <code class="computeroutput"><span class="special">\\</span><span class="identifier">N</span><span class="special">{</span><span class="identifier">newline</span><span class="special">}</span></code> matches the single character \n.
</p>
</td>
</table></div>
<h6>
<a name="boost_regex.syntax.basic_extended.h18"></a>
- <span><a name="boost_regex.syntax.basic_extended._quot_single_character_quot__character_classes_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended._quot_single_character_quot__character_classes_">"Single
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended._quot_single_character_quot__character_classes_"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended._quot_single_character_quot__character_classes_">"Single
character" character classes:</a>
</h6>
<p>
</table></div>
<h6>
<a name="boost_regex.syntax.basic_extended.h19"></a>
- <span><a name="boost_regex.syntax.basic_extended.character_properties"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.character_properties">Character
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.character_properties"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.character_properties">Character
Properties</a>
</h6>
<p>
</p>
<h6>
<a name="boost_regex.syntax.basic_extended.h20"></a>
- <span><a name="boost_regex.syntax.basic_extended.word_boundaries"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.word_boundaries">Word
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.word_boundaries"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.word_boundaries">Word
Boundaries</a>
</h6>
<p>
</table></div>
<h6>
<a name="boost_regex.syntax.basic_extended.h21"></a>
- <span><a name="boost_regex.syntax.basic_extended.buffer_boundaries"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.buffer_boundaries">Buffer
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.buffer_boundaries"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.buffer_boundaries">Buffer
boundaries</a>
</h6>
<p>
</table></div>
<h6>
<a name="boost_regex.syntax.basic_extended.h22"></a>
- <span><a name="boost_regex.syntax.basic_extended.continuation_escape"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.continuation_escape">Continuation
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.continuation_escape"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.continuation_escape">Continuation
Escape</a>
</h6>
<p>
</p>
<h6>
<a name="boost_regex.syntax.basic_extended.h23"></a>
- <span><a name="boost_regex.syntax.basic_extended.quoting_escape"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.quoting_escape">Quoting
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.quoting_escape"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.quoting_escape">Quoting
escape</a>
</h6>
<p>
</pre>
<h6>
<a name="boost_regex.syntax.basic_extended.h24"></a>
- <span><a name="boost_regex.syntax.basic_extended.unicode_escapes"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.unicode_escapes">Unicode
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.unicode_escapes"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.unicode_escapes">Unicode
escapes</a>
</h6>
<div class="informaltable"><table class="table">
</table></div>
<h6>
<a name="boost_regex.syntax.basic_extended.h25"></a>
- <span><a name="boost_regex.syntax.basic_extended.any_other_escape"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.any_other_escape">Any
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.any_other_escape"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.any_other_escape">Any
other escape</a>
</h6>
<p>
</p>
<h5>
<a name="boost_regex.syntax.basic_extended.h26"></a>
- <span><a name="boost_regex.syntax.basic_extended.operator_precedence"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.operator_precedence">Operator
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.operator_precedence"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.operator_precedence">Operator
precedence</a>
</h5>
<p>
</ol></div>
<h5>
<a name="boost_regex.syntax.basic_extended.h27"></a>
- <span><a name="boost_regex.syntax.basic_extended.what_gets_matched"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.what_gets_matched">What
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.what_gets_matched"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.what_gets_matched">What
Gets Matched</a>
</h5>
<p>
</p>
<h4>
<a name="boost_regex.syntax.basic_extended.h28"></a>
- <span><a name="boost_regex.syntax.basic_extended.variations"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.variations">Variations</a>
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.variations"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.variations">Variations</a>
</h4>
<h5>
<a name="boost_regex.syntax.basic_extended.h29"></a>
- <span><a name="boost_regex.syntax.basic_extended.egrep"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.egrep">Egrep</a>
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.egrep"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.egrep">Egrep</a>
</h5>
<p>
When an expression is compiled with the <a class="link" href="../ref/syntax_option_type.html" title="syntax_option_type">flag
</p>
<h5>
<a name="boost_regex.syntax.basic_extended.h30"></a>
- <span><a name="boost_regex.syntax.basic_extended.awk"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.awk">awk</a>
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.awk"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.awk">awk</a>
</h5>
<p>
In addition to the <a class="link" href="basic_extended.html#boost_regex.posix_extended_syntax">POSIX-Extended
</p>
<h4>
<a name="boost_regex.syntax.basic_extended.h31"></a>
- <span><a name="boost_regex.syntax.basic_extended.options"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.options">Options</a>
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.options"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.options">Options</a>
</h4>
<p>
There are a <a class="link" href="../ref/syntax_option_type/syntax_option_type_extended.html" title="Options for POSIX Extended Regular Expressions">variety
</p>
<h4>
<a name="boost_regex.syntax.basic_extended.h32"></a>
- <span><a name="boost_regex.syntax.basic_extended.references"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.references">References</a>
+ <span class="phrase"><a name="boost_regex.syntax.basic_extended.references"></a></span><a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.references">References</a>
</h4>
<p>
<a href="http://www.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap09.html" target="_top">IEEE
</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">Copyright © 1998-2010 John Maddock<p>
+<td align="right"><div class="copyright-footer">Copyright © 1998-2013 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>