boostorg/regex
1
0
Fork 1
mirror of https://github.com/boostorg/regex.git synced 2025-07-02 15:20:58 +02:00
Code Issues Packages Projects Releases Wiki Activity

Merged accumulated patches from Trunk.

Browse Source 
[SVN r62831]
This commit is contained in:
John Maddock
2010-06-12 08:30:11 +00:00
parent 61f4b3360f
commit 9529cb8bc0
91 changed files with 4251 additions and 4062 deletions
Download Patch File Download Diff File Expand all files Collapse all files

66
doc/html/boost_regex/syntax/basic_extended.html
View File

@ -28,7 +28,7 @@
Expression Syntax</a>
</h3></div></div></div>
<a name="boost_regex.syntax.basic_extended.synopsis"></a><h4>
<a name="id792276"></a>
<a name="id681924"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.synopsis">Synopsis</a>
</h4>
<p>
@ -46,7 +46,7 @@
<a name="boost_regex.posix_extended_syntax"></a><p>
</p>
<a name="boost_regex.syntax.basic_extended.posix_extended_syntax"></a><h4>
<a name="id792454"></a>
<a name="id682102"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.posix_extended_syntax">POSIX
Extended Syntax</a>
</h4>
@ -56,7 +56,7 @@
</p>
<pre class="programlisting">.[{()\*+?|^$</pre>
<a name="boost_regex.syntax.basic_extended.wildcard_"></a><h5>
<a name="id792476"></a>
<a name="id682124"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.wildcard_">Wildcard:</a>
</h5>
<p>
@ -74,7 +74,7 @@
</li>
</ul></div>
<a name="boost_regex.syntax.basic_extended.anchors_"></a><h5>
<a name="id792520"></a>
<a name="id682168"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.anchors_">Anchors:</a>
</h5>
<p>
@ -86,7 +86,7 @@
of an expression, or the last character of a sub-expression.
</p>
<a name="boost_regex.syntax.basic_extended.marked_sub_expressions_"></a><h5>
<a name="id792543"></a>
<a name="id682191"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.marked_sub_expressions_">Marked
sub-expressions:</a>
</h5>
@ -98,7 +98,7 @@
to by a back-reference.
</p>
<a name="boost_regex.syntax.basic_extended.repeats_"></a><h5>
<a name="id792577"></a>
<a name="id682225"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.repeats_">Repeats:</a>
</h5>
<p>
@ -184,7 +184,7 @@ cab
operator to be applied to.
</p>
<a name="boost_regex.syntax.basic_extended.back_references_"></a><h5>
<a name="id792883"></a>
<a name="id682531"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.back_references_">Back references:</a>
</h5>
<p>
@ -214,7 +214,7 @@ cab
</p></td></tr>
</table></div>
<a name="boost_regex.syntax.basic_extended.alternation"></a><h5>
<a name="id792946"></a>
<a name="id682594"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.alternation">Alternation</a>
</h5>
<p>
@ -227,7 +227,7 @@ cab
will match either of "abd" or "abef".
</p>
<a name="boost_regex.syntax.basic_extended.character_sets_"></a><h5>
<a name="id793014"></a>
<a name="id682662"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.character_sets_">Character
sets:</a>
</h5>
@ -240,7 +240,7 @@ cab
A bracket expression may contain any combination of the following:
</p>
<a name="boost_regex.syntax.basic_extended.single_characters_"></a><h6>
<a name="id793034"></a>
<a name="id682682"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.single_characters_">Single
characters:</a>
</h6>
@ -249,7 +249,7 @@ cab
or 'c'.
</p>
<a name="boost_regex.syntax.basic_extended.character_ranges_"></a><h6>
<a name="id793065"></a>
<a name="id682713"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.character_ranges_">Character
ranges:</a>
</h6>
@ -265,7 +265,7 @@ cab
the code points of the characters only.
</p>
<a name="boost_regex.syntax.basic_extended.negation_"></a><h6>
<a name="id793126"></a>
<a name="id682774"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.negation_">Negation:</a>
</h6>
<p>
@ -274,7 +274,7 @@ cab
range <code class="computeroutput"><span class="identifier">a</span><span class="special">-</span><span class="identifier">c</span></code>.
</p>
<a name="boost_regex.syntax.basic_extended.character_classes_"></a><h6>
<a name="id793180"></a>
<a name="id682828"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.character_classes_">Character
classes:</a>
</h6>
@ -284,7 +284,7 @@ cab
<a class="link" href="character_classes.html" title="Character Class Names">character class names</a>.
</p>
<a name="boost_regex.syntax.basic_extended.collating_elements_"></a><h6>
<a name="id793232"></a>
<a name="id682880"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.collating_elements_">Collating
Elements:</a>
</h6>
@ -312,7 +312,7 @@ cab
matches a NUL character.
</p>
<a name="boost_regex.syntax.basic_extended.equivalence_classes_"></a><h6>
<a name="id793334"></a>
<a name="id682982"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.equivalence_classes_">Equivalence
classes:</a>
</h6>
@ -329,7 +329,7 @@ cab
or even all locales on one platform.
</p>
<a name="boost_regex.syntax.basic_extended.combinations_"></a><h6>
<a name="id793392"></a>
<a name="id683040"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.combinations_">Combinations:</a>
</h6>
<p>
@ -337,7 +337,7 @@ cab
<code class="computeroutput"><span class="special">[[:</span><span class="identifier">digit</span><span class="special">:]</span><span class="identifier">a</span><span class="special">-</span><span class="identifier">c</span><span class="special">[.</span><span class="identifier">NUL</span><span class="special">.]]</span></code>.
</p>
<a name="boost_regex.syntax.basic_extended.escapes"></a><h5>
<a name="id793444"></a>
<a name="id683092"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.escapes">Escapes</a>
</h5>
<p>
@ -363,7 +363,7 @@ cab
extensions are also supported by Boost.Regex:
</p>
<a name="boost_regex.syntax.basic_extended.escapes_matching_a_specific_character"></a><h6>
<a name="id793488"></a>
<a name="id683362"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.escapes_matching_a_specific_character">Escapes
matching a specific character</a>
</h6>
@ -552,7 +552,7 @@ cab
</tbody>
</table></div>
<a name="boost_regex.syntax.basic_extended._quot_single_character_quot__character_classes_"></a><h6>
<a name="id794132"></a>
<a name="id683652"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended._quot_single_character_quot__character_classes_">"Single
character" character classes:</a>
</h6>
@ -706,7 +706,7 @@ cab
</tbody>
</table></div>
<a name="boost_regex.syntax.basic_extended.character_properties"></a><h6>
<a name="id794620"></a>
<a name="id684141"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.character_properties">Character
Properties</a>
</h6>
@ -813,7 +813,7 @@ cab
matches any "digit" character, as does <code class="computeroutput"><span class="special">\</span><span class="identifier">p</span><span class="special">{</span><span class="identifier">digit</span><span class="special">}</span></code>.
</p>
<a name="boost_regex.syntax.basic_extended.word_boundaries"></a><h6>
<a name="id794927"></a>
<a name="id684448"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.word_boundaries">Word Boundaries</a>
</h6>
<p>
@ -888,7 +888,7 @@ cab
</tbody>
</table></div>
<a name="boost_regex.syntax.basic_extended.buffer_boundaries"></a><h6>
<a name="id795083"></a>
<a name="id684604"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.buffer_boundaries">Buffer
boundaries</a>
</h6>
@ -979,7 +979,7 @@ cab
</tbody>
</table></div>
<a name="boost_regex.syntax.basic_extended.continuation_escape"></a><h6>
<a name="id795268"></a>
<a name="id684789"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.continuation_escape">Continuation
Escape</a>
</h6>
@ -991,7 +991,7 @@ cab
match to start where the last one ended.
</p>
<a name="boost_regex.syntax.basic_extended.quoting_escape"></a><h6>
<a name="id795296"></a>
<a name="id684816"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.quoting_escape">Quoting
escape</a>
</h6>
@ -1005,7 +1005,7 @@ cab
<span class="special">\*+</span><span class="identifier">aaa</span>
</pre>
<a name="boost_regex.syntax.basic_extended.unicode_escapes"></a><h6>
<a name="id795376"></a>
<a name="id684897"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.unicode_escapes">Unicode
escapes</a>
</h6>
@ -1056,7 +1056,7 @@ cab
</tbody>
</table></div>
<a name="boost_regex.syntax.basic_extended.any_other_escape"></a><h6>
<a name="id795478"></a>
<a name="id684999"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.any_other_escape">Any other
escape</a>
</h6>
@ -1065,7 +1065,7 @@ cab
\@ matches a literal '@'.
</p>
<a name="boost_regex.syntax.basic_extended.operator_precedence"></a><h5>
<a name="id795495"></a>
<a name="id685015"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.operator_precedence">Operator
precedence</a>
</h5>
@ -1101,7 +1101,7 @@ cab
</li>
</ol></div>
<a name="boost_regex.syntax.basic_extended.what_gets_matched"></a><h5>
<a name="id795628"></a>
<a name="id685149"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.what_gets_matched">What
Gets Matched</a>
</h5>
@ -1111,11 +1111,11 @@ cab
rule</a>.
</p>
<a name="boost_regex.syntax.basic_extended.variations"></a><h4>
<a name="id795650"></a>
<a name="id685170"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.variations">Variations</a>
</h4>
<a name="boost_regex.syntax.basic_extended.egrep"></a><h5>
<a name="id795663"></a>
<a name="id685183"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.egrep">Egrep</a>
</h5>
<p>
@ -1136,7 +1136,7 @@ cab
used with the -E option.
</p>
<a name="boost_regex.syntax.basic_extended.awk"></a><h5>
<a name="id795765"></a>
<a name="id685285"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.awk">awk</a>
</h5>
<p>
@ -1150,7 +1150,7 @@ cab
these by default anyway.
</p>
<a name="boost_regex.syntax.basic_extended.options"></a><h4>
<a name="id795790"></a>
<a name="id685311"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.options">Options</a>
</h4>
<p>
@ -1163,7 +1163,7 @@ cab
modify how the case and locale sensitivity are to be applied.
</p>
<a name="boost_regex.syntax.basic_extended.references"></a><h4>
<a name="id795868"></a>
<a name="id685389"></a>
<a class="link" href="basic_extended.html#boost_regex.syntax.basic_extended.references">References</a>
</h4>
<p>

44
doc/html/boost_regex/syntax/basic_syntax.html
View File

@ -28,7 +28,7 @@
Expression Syntax</a>
</h3></div></div></div>
<a name="boost_regex.syntax.basic_syntax.synopsis"></a><h4>
<a name="id795917"></a>
<a name="id685438"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.synopsis">Synopsis</a>
</h4>
<p>
@ -45,7 +45,7 @@
<a name="boost_regex.posix_basic"></a><p>
</p>
<a name="boost_regex.syntax.basic_syntax.posix_basic_syntax"></a><h4>
<a name="id797977"></a>
<a name="id686183"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.posix_basic_syntax">POSIX
Basic Syntax</a>
</h4>
@ -55,7 +55,7 @@
</p>
<pre class="programlisting">.[\*^$</pre>
<a name="boost_regex.syntax.basic_syntax.wildcard_"></a><h5>
<a name="id797998"></a>
<a name="id686205"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.wildcard_">Wildcard:</a>
</h5>
<p>
@ -73,7 +73,7 @@
</li>
</ul></div>
<a name="boost_regex.syntax.basic_syntax.anchors_"></a><h5>
<a name="id798043"></a>
<a name="id686249"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.anchors_">Anchors:</a>
</h5>
<p>
@ -85,7 +85,7 @@
of an expression, or the last character of a sub-expression.
</p>
<a name="boost_regex.syntax.basic_syntax.marked_sub_expressions_"></a><h5>
<a name="id798063"></a>
<a name="id686270"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.marked_sub_expressions_">Marked
sub-expressions:</a>
</h5>
@ -97,7 +97,7 @@
by a back-reference.
</p>
<a name="boost_regex.syntax.basic_syntax.repeats_"></a><h5>
<a name="id798094"></a>
<a name="id686301"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.repeats_">Repeats:</a>
</h5>
<p>
@ -155,7 +155,7 @@ aaaa
to.
</p>
<a name="boost_regex.syntax.basic_syntax.back_references_"></a><h5>
<a name="id798259"></a>
<a name="id686465"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.back_references_">Back references:</a>
</h5>
<p>
@ -173,7 +173,7 @@ aaaa
</p>
<pre class="programlisting">aaabba</pre>
<a name="boost_regex.syntax.basic_syntax.character_sets_"></a><h5>
<a name="id798308"></a>
<a name="id686515"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.character_sets_">Character
sets:</a>
</h5>
@ -186,7 +186,7 @@ aaaa
A bracket expression may contain any combination of the following:
</p>
<a name="boost_regex.syntax.basic_syntax.single_characters_"></a><h6>
<a name="id798328"></a>
<a name="id686535"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.single_characters_">Single
characters:</a>
</h6>
@ -195,7 +195,7 @@ aaaa
or 'c'.
</p>
<a name="boost_regex.syntax.basic_syntax.character_ranges_"></a><h6>
<a name="id798360"></a>
<a name="id686566"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.character_ranges_">Character
ranges:</a>
</h6>
@ -211,7 +211,7 @@ aaaa
of the characters only.
</p>
<a name="boost_regex.syntax.basic_syntax.negation_"></a><h6>
<a name="id798416"></a>
<a name="id686623"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.negation_">Negation:</a>
</h6>
<p>
@ -220,7 +220,7 @@ aaaa
range a-c.
</p>
<a name="boost_regex.syntax.basic_syntax.character_classes_"></a><h6>
<a name="id798454"></a>
<a name="id686661"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.character_classes_">Character
classes:</a>
</h6>
@ -230,7 +230,7 @@ aaaa
<a class="link" href="character_classes.html" title="Character Class Names">character class names</a>.
</p>
<a name="boost_regex.syntax.basic_syntax.collating_elements_"></a><h6>
<a name="id798506"></a>
<a name="id686713"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.collating_elements_">Collating
Elements:</a>
</h6>
@ -259,7 +259,7 @@ aaaa
element names</a>.
</p>
<a name="boost_regex.syntax.basic_syntax.equivalence_classes_"></a><h6>
<a name="id798597"></a>
<a name="id686804"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.equivalence_classes_">Equivalence
classes:</a>
</h6>
@ -276,7 +276,7 @@ aaaa
or even all locales on one platform.
</p>
<a name="boost_regex.syntax.basic_syntax.combinations_"></a><h6>
<a name="id798655"></a>
<a name="id686861"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.combinations_">Combinations:</a>
</h6>
<p>
@ -284,7 +284,7 @@ aaaa
<code class="computeroutput"><span class="special">[[:</span><span class="identifier">digit</span><span class="special">:]</span><span class="identifier">a</span><span class="special">-</span><span class="identifier">c</span><span class="special">[.</span><span class="identifier">NUL</span><span class="special">.]].</span></code>
</p>
<a name="boost_regex.syntax.basic_syntax.escapes"></a><h5>
<a name="id798708"></a>
<a name="id686914"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.escapes">Escapes</a>
</h5>
<p>
@ -299,7 +299,7 @@ aaaa
will match either a literal '\' or a '^'.
</p>
<a name="boost_regex.syntax.basic_syntax.what_gets_matched"></a><h4>
<a name="id798741"></a>
<a name="id686948"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.what_gets_matched">What Gets
Matched</a>
</h4>
@ -309,13 +309,13 @@ aaaa
rule</a>.
</p>
<a name="boost_regex.syntax.basic_syntax.variations"></a><h4>
<a name="id798763"></a>
<a name="id686969"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.variations">Variations</a>
</h4>
<a name="boost_regex.grep_syntax"></a><p>
</p>
<a name="boost_regex.syntax.basic_syntax.grep"></a><h5>
<a name="id798783"></a>
<a name="id686990"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.grep">Grep</a>
</h5>
<p>
@ -333,7 +333,7 @@ aaaa
As its name suggests, this behavior is consistent with the Unix utility grep.
</p>
<a name="boost_regex.syntax.basic_syntax.emacs"></a><h5>
<a name="id798878"></a>
<a name="id687085"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.emacs">emacs</a>
</h5>
<p>
@ -613,7 +613,7 @@ aaaa
leftmost-longest rule</a>.
</p>
<a name="boost_regex.syntax.basic_syntax.options"></a><h4>
<a name="id799296"></a>
<a name="id687502"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.options">Options</a>
</h4>
<p>
@ -627,7 +627,7 @@ aaaa
options</a> modify how the case and locale sensitivity are to be applied.
</p>
<a name="boost_regex.syntax.basic_syntax.references"></a><h4>
<a name="id799402"></a>
<a name="id687609"></a>
<a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.references">References</a>
</h4>
<p>

114
doc/html/boost_regex/syntax/perl_syntax.html
View File

@ -28,7 +28,7 @@
Syntax</a>
</h3></div></div></div>
<a name="boost_regex.syntax.perl_syntax.synopsis"></a><h4>
<a name="id786403"></a>
<a name="id675915"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.synopsis">Synopsis</a>
</h4>
<p>
@ -43,7 +43,7 @@
</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span> <span class="identifier">e2</span><span class="special">(</span><span class="identifier">my_expression</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span><span class="special">::</span><span class="identifier">perl</span><span class="special">|</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span><span class="special">::</span><span class="identifier">icase</span><span class="special">);</span>
</pre>
<a name="boost_regex.syntax.perl_syntax.perl_regular_expression_syntax"></a><h4>
<a name="id786551"></a>
<a name="id676062"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.perl_regular_expression_syntax">Perl
Regular Expression Syntax</a>
</h4>
@ -53,7 +53,7 @@
</p>
<pre class="programlisting">.[{()\*+?|^$</pre>
<a name="boost_regex.syntax.perl_syntax.wildcard"></a><h5>
<a name="id786575"></a>
<a name="id676086"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.wildcard">Wildcard</a>
</h5>
<p>
@ -73,7 +73,7 @@
</li>
</ul></div>
<a name="boost_regex.syntax.perl_syntax.anchors"></a><h5>
<a name="id786621"></a>
<a name="id676133"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.anchors">Anchors</a>
</h5>
<p>
@ -83,7 +83,7 @@
A '$' character shall match the end of a line.
</p>
<a name="boost_regex.syntax.perl_syntax.marked_sub_expressions"></a><h5>
<a name="id786643"></a>
<a name="id676155"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.marked_sub_expressions">Marked
sub-expressions</a>
</h5>
@ -94,7 +94,7 @@
can also repeated, or referred to by a back-reference.
</p>
<a name="boost_regex.syntax.perl_syntax.non_marking_grouping"></a><h5>
<a name="id786669"></a>
<a name="id676181"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.non_marking_grouping">Non-marking
grouping</a>
</h5>
@ -107,7 +107,7 @@
without splitting out any separate sub-expressions.
</p>
<a name="boost_regex.syntax.perl_syntax.repeats"></a><h5>
<a name="id786705"></a>
<a name="id676217"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.repeats">Repeats</a>
</h5>
<p>
@ -188,7 +188,7 @@
to be applied to.
</p>
<a name="boost_regex.syntax.perl_syntax.non_greedy_repeats"></a><h5>
<a name="id786942"></a>
<a name="id676453"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.non_greedy_repeats">Non greedy
repeats</a>
</h5>
@ -218,16 +218,16 @@
while consuming as little input as possible.
</p>
<a name="boost_regex.syntax.perl_syntax.pocessive_repeats"></a><h5>
<a name="id787001"></a>
<a name="id676512"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.pocessive_repeats">Pocessive
repeats</a>
</h5>
<p>
By default when a repeated patten does not match then the engine will backtrack
By default when a repeated pattern does not match then the engine will backtrack
until a match is found. However, this behaviour can sometime be undesireable
so there are also "pocessive" repeats: these match as much as possible
and do not then allow backtracking if the rest of the expression fails to
match.
so there are also "possessive" repeats: these match as much as
possible and do not then allow backtracking if the rest of the expression
fails to match.
</p>
<p>
<code class="literal">*+</code> Matches the previous atom zero or more times, while
@ -250,7 +250,7 @@
while giving nothing back.
</p>
<a name="boost_regex.syntax.perl_syntax.back_references"></a><h5>
<a name="id787059"></a>
<a name="id676571"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.back_references">Back references</a>
</h5>
<p>
@ -360,7 +360,7 @@
named "two".
</p>
<a name="boost_regex.syntax.perl_syntax.alternation"></a><h5>
<a name="id787279"></a>
<a name="id676791"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.alternation">Alternation</a>
</h5>
<p>
@ -387,7 +387,7 @@
<code class="literal">(?:abc)??</code> has exactly the same effect.
</p>
<a name="boost_regex.syntax.perl_syntax.character_sets"></a><h5>
<a name="id787347"></a>
<a name="id677140"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.character_sets">Character sets</a>
</h5>
<p>
@ -399,7 +399,7 @@
A bracket expression may contain any combination of the following:
</p>
<a name="boost_regex.syntax.perl_syntax.single_characters"></a><h6>
<a name="id788761"></a>
<a name="id677171"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.single_characters">Single characters</a>
</h6>
<p>
@ -407,7 +407,7 @@
'b', or 'c'.
</p>
<a name="boost_regex.syntax.perl_syntax.character_ranges"></a><h6>
<a name="id788783"></a>
<a name="id677192"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.character_ranges">Character
ranges</a>
</h6>
@ -421,7 +421,7 @@
sensitive.
</p>
<a name="boost_regex.syntax.perl_syntax.negation"></a><h6>
<a name="id788815"></a>
<a name="id677225"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.negation">Negation</a>
</h6>
<p>
@ -430,7 +430,7 @@
matches any character that is not in the range <code class="literal">a-c</code>.
</p>
<a name="boost_regex.syntax.perl_syntax.character_classes"></a><h6>
<a name="id788843"></a>
<a name="id677252"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.character_classes">Character
classes</a>
</h6>
@ -441,7 +441,7 @@
class names</a>.
</p>
<a name="boost_regex.syntax.perl_syntax.collating_elements"></a><h6>
<a name="id788875"></a>
<a name="id677285"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.collating_elements">Collating
Elements</a>
</h6>
@ -463,7 +463,7 @@
matches a <code class="literal">\0</code> character.
</p>
<a name="boost_regex.syntax.perl_syntax.equivalence_classes"></a><h6>
<a name="id788938"></a>
<a name="id677347"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.equivalence_classes">Equivalence
classes</a>
</h6>
@ -480,7 +480,7 @@
or even all locales on one platform.
</p>
<a name="boost_regex.syntax.perl_syntax.escaped_characters"></a><h6>
<a name="id788986"></a>
<a name="id677395"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.escaped_characters">Escaped
Characters</a>
</h6>
@ -492,7 +492,7 @@
is <span class="emphasis"><em>not</em></span> a "word" character.
</p>
<a name="boost_regex.syntax.perl_syntax.combinations"></a><h6>
<a name="id789054"></a>
<a name="id677464"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.combinations">Combinations</a>
</h6>
<p>
@ -500,7 +500,7 @@
<code class="literal">[[:digit:]a-c[.NUL.]]</code>.
</p>
<a name="boost_regex.syntax.perl_syntax.escapes"></a><h5>
<a name="id789076"></a>
<a name="id677485"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.escapes">Escapes</a>
</h5>
<p>
@ -692,7 +692,7 @@
</tbody>
</table></div>
<a name="boost_regex.syntax.perl_syntax._quot_single_character_quot__character_classes_"></a><h6>
<a name="id789463"></a>
<a name="id677873"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax._quot_single_character_quot__character_classes_">"Single
character" character classes:</a>
</h6>
@ -894,7 +894,7 @@
</tbody>
</table></div>
<a name="boost_regex.syntax.perl_syntax.character_properties"></a><h6>
<a name="id790063"></a>
<a name="id678473"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.character_properties">Character
Properties</a>
</h6>
@ -1002,7 +1002,7 @@
as does <code class="literal">\p{digit}</code>.
</p>
<a name="boost_regex.syntax.perl_syntax.word_boundaries"></a><h6>
<a name="id790352"></a>
<a name="id678762"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.word_boundaries">Word Boundaries</a>
</h6>
<p>
@ -1021,7 +1021,7 @@
<code class="literal">\B</code> Matches only when not at a word boundary.
</p>
<a name="boost_regex.syntax.perl_syntax.buffer_boundaries"></a><h6>
<a name="id790404"></a>
<a name="id678814"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.buffer_boundaries">Buffer boundaries</a>
</h6>
<p>
@ -1036,17 +1036,19 @@
\' Matches at the end of a buffer only.
</p>
<p>
\A Matches at the start of a buffer only (the same as \`).
\A Matches at the start of a buffer only (the same as <code class="literal">\\\`</code>).
</p>
<p>
\z Matches at the end of a buffer only (the same as \').
\z Matches at the end of a buffer only (the same as <code class="literal">\\'</code>).
</p>
<p>
\Z Matches an optional sequence of newlines at the end of a buffer: equivalent
to the regular expression <code class="literal">\n*\z</code>
\Z Matches a zero-width assertion consisting of an optional sequence of newlines
at the end of a buffer: equivalent to the regular expression <code class="literal">(?=\v*\z)</code>.
Note that this is subtly different from Perl which behaves as if matching
<code class="literal">(?=\n?\z)</code>.
</p>
<a name="boost_regex.syntax.perl_syntax.continuation_escape"></a><h6>
<a name="id790445"></a>
<a name="id678871"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.continuation_escape">Continuation
Escape</a>
</h6>
@ -1058,7 +1060,7 @@
one ended.
</p>
<a name="boost_regex.syntax.perl_syntax.quoting_escape"></a><h6>
<a name="id790466"></a>
<a name="id678893"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.quoting_escape">Quoting escape</a>
</h6>
<p>
@ -1071,7 +1073,7 @@
<span class="special">\*+</span><span class="identifier">aaa</span>
</pre>
<a name="boost_regex.syntax.perl_syntax.unicode_escapes"></a><h6>
<a name="id790513"></a>
<a name="id678940"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.unicode_escapes">Unicode escapes</a>
</h6>
<p>
@ -1081,7 +1083,7 @@
followed by a sequence of zero or more combining characters.
</p>
<a name="boost_regex.syntax.perl_syntax.matching_line_endings"></a><h6>
<a name="id790540"></a>
<a name="id678966"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.matching_line_endings">Matching
Line Endings</a>
</h6>
@ -1090,7 +1092,7 @@
sequence, specifically it is identical to the expression <code class="literal">(?&gt;\x0D\x0A?|[\x0A-\x0C\x85\x{2028}\x{2029}])</code>.
</p>
<a name="boost_regex.syntax.perl_syntax.keeping_back_some_text"></a><h6>
<a name="id790566"></a>
<a name="id678992"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.keeping_back_some_text">Keeping
back some text</a>
</h6>
@ -1105,7 +1107,7 @@
This can be used to simulate variable width lookbehind assertions.
</p>
<a name="boost_regex.syntax.perl_syntax.any_other_escape"></a><h6>
<a name="id790596"></a>
<a name="id679022"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.any_other_escape">Any other
escape</a>
</h6>
@ -1114,7 +1116,7 @@
\@ matches a literal '@'.
</p>
<a name="boost_regex.syntax.perl_syntax.perl_extended_patterns"></a><h5>
<a name="id790613"></a>
<a name="id679039"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.perl_extended_patterns">Perl
Extended Patterns</a>
</h5>
@ -1123,7 +1125,7 @@
<code class="literal">(?</code>.
</p>
<a name="boost_regex.syntax.perl_syntax.named_subexpressions"></a><h6>
<a name="id790634"></a>
<a name="id679061"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.named_subexpressions">Named
Subexpressions</a>
</h6>
@ -1145,14 +1147,14 @@
format string for search and replace operations, or in the <a class="link" href="../ref/match_results.html" title="match_results"><code class="computeroutput"><span class="identifier">match_results</span></code></a> member functions.
</p>
<a name="boost_regex.syntax.perl_syntax.comments"></a><h6>
<a name="id790729"></a>
<a name="id679156"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.comments">Comments</a>
</h6>
<p>
<code class="literal">(?# ... )</code> is treated as a comment, it's contents are ignored.
</p>
<a name="boost_regex.syntax.perl_syntax.modifiers"></a><h6>
<a name="id790752"></a>
<a name="id679178"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.modifiers">Modifiers</a>
</h6>
<p>
@ -1166,7 +1168,7 @@
pattern only.
</p>
<a name="boost_regex.syntax.perl_syntax.non_marking_groups"></a><h6>
<a name="id790787"></a>
<a name="id679213"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.non_marking_groups">Non-marking
groups</a>
</h6>
@ -1175,7 +1177,7 @@
an additional sub-expression.
</p>
<a name="boost_regex.syntax.perl_syntax.branch_reset"></a><h6>
<a name="id790808"></a>
<a name="id679235"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.branch_reset">Branch reset</a>
</h6>
<p>
@ -1197,7 +1199,7 @@
# 1 2 2 3 2 3 4
</pre>
<a name="boost_regex.syntax.perl_syntax.lookahead"></a><h6>
<a name="id790846"></a>
<a name="id679272"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.lookahead">Lookahead</a>
</h6>
<p>
@ -1220,7 +1222,7 @@
could be used to validate the password.
</p>
<a name="boost_regex.syntax.perl_syntax.lookbehind"></a><h6>
<a name="id791346"></a>
<a name="id680994"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.lookbehind">Lookbehind</a>
</h6>
<p>
@ -1234,7 +1236,7 @@
(pattern must be of fixed length).
</p>
<a name="boost_regex.syntax.perl_syntax.independent_sub_expressions"></a><h6>
<a name="id791378"></a>
<a name="id681026"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.independent_sub_expressions">Independent
sub-expressions</a>
</h6>
@ -1247,7 +1249,7 @@
no match is found at all.
</p>
<a name="boost_regex.syntax.perl_syntax.recursive_expressions"></a><h6>
<a name="id791409"></a>
<a name="id681057"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.recursive_expressions">Recursive
Expressions</a>
</h6>
@ -1271,7 +1273,7 @@
to the next sub-expression to be declared.
</p>
<a name="boost_regex.syntax.perl_syntax.conditional_expressions"></a><h6>
<a name="id791506"></a>
<a name="id681154"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.conditional_expressions">Conditional
Expressions</a>
</h6>
@ -1319,7 +1321,7 @@
</li>
</ul></div>
<a name="boost_regex.syntax.perl_syntax.operator_precedence"></a><h5>
<a name="id791648"></a>
<a name="id681296"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.operator_precedence">Operator
precedence</a>
</h5>
@ -1354,7 +1356,7 @@
</li>
</ol></div>
<a name="boost_regex.syntax.perl_syntax.what_gets_matched"></a><h4>
<a name="id791738"></a>
<a name="id681386"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.what_gets_matched">What gets
matched</a>
</h4>
@ -1529,7 +1531,7 @@
</tbody>
</table></div>
<a name="boost_regex.syntax.perl_syntax.variations"></a><h4>
<a name="id792096"></a>
<a name="id681744"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.variations">Variations</a>
</h4>
<p>
@ -1538,7 +1540,7 @@
and <code class="literal">JScript</code></a> are all synonyms for <code class="literal">perl</code>.
</p>
<a name="boost_regex.syntax.perl_syntax.options"></a><h4>
<a name="id792142"></a>
<a name="id681790"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.options">Options</a>
</h4>
<p>
@ -1550,7 +1552,7 @@
are to be applied.
</p>
<a name="boost_regex.syntax.perl_syntax.pattern_modifiers"></a><h4>
<a name="id792190"></a>
<a name="id681838"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.pattern_modifiers">Pattern
Modifiers</a>
</h4>
@ -1562,7 +1564,7 @@
and <code class="literal">no_mod_s</code></a>.
</p>
<a name="boost_regex.syntax.perl_syntax.references"></a><h4>
<a name="id792243"></a>
<a name="id681891"></a>
<a class="link" href="perl_syntax.html#boost_regex.syntax.perl_syntax.references">References</a>
</h4>
<p>