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[SVN r40867]
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Joel de Guzman
2007-11-07 03:23:31 +00:00
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doc/html/boost_regex/partial_matches.html
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Partial Matches</title>
<title> Partial Matches</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="../index.html" title="Boost.Regex">
<link rel="prev" href="captures.html" title="Understanding Marked Sub-Expressions and Captures">
<link rel="next" href="syntax.html" title="Regular Expression Syntax">
<link rel="prev" href="captures.html" title=" Understanding Marked Sub-Expressions
and Captures">
<link rel="next" href="syntax.html" title=" Regular Expression Syntax">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
@ -24,13 +25,13 @@
</div>
<div class="section" lang="en">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="boost_regex.partial_matches"></a><a href="partial_matches.html" title="Partial Matches"> Partial Matches</a>
</h2></div></div></div>
<a name="boost_regex.partial_matches"></a><a href="partial_matches.html" title=" Partial Matches"> Partial Matches</a></h2></div></div></div>
<p>
The <a href="ref/match_flag_type.html" title="match_flag_type"><code class="computeroutput"><span class="identifier">match_flag_type</span></code></a>
<code class="computeroutput"><span class="identifier">match_partial</span></code> can be passed
to the following algorithms: <a href="ref/regex_match.html" title="regex_match"><code class="computeroutput"><span class="identifier">regex_match</span></code></a>, <a href="ref/regex_search.html" title="regex_search"><code class="computeroutput"><span class="identifier">regex_search</span></code></a>, and <a href="ref/deprecated_interfaces/regex_grep.html" title="regex_grep (Deprecated)"><code class="computeroutput"><span class="identifier">regex_grep</span></code></a>, and used with the iterator
<a href="ref/regex_iterator.html" title="regex_iterator"><code class="computeroutput"><span class="identifier">regex_iterator</span></code></a>.
The <a href="ref/match_flag_type.html" title=" match_flag_type"><tt class="computeroutput"><span class="identifier">match_flag_type</span></tt></a>
<tt class="computeroutput"><span class="identifier">match_partial</span></tt> can be passed
to the following algorithms: <a href="ref/regex_match.html" title=" regex_match"><tt class="computeroutput"><span class="identifier">regex_match</span></tt></a>, <a href="ref/regex_search.html" title=" regex_search"><tt class="computeroutput"><span class="identifier">regex_search</span></tt></a>, and <a href="ref/deprecated_interfaces/regex_grep.html" title="
regex_grep (Deprecated)"><tt class="computeroutput"><span class="identifier">regex_grep</span></tt></a>, and used with the iterator
<a href="ref/regex_iterator.html" title=" regex_iterator"><tt class="computeroutput"><span class="identifier">regex_iterator</span></tt></a>.
When used it indicates that partial as well as full matches should be found.
A partial match is one that matched one or more characters at the end of the
text input, but did not match all of the regular expression (although it may
@ -40,9 +41,10 @@
into memory (or even into a memory mapped file), or are of indeterminate length
(for example the source may be a socket or similar). Partial and full matches
can be differentiated as shown in the following table (the variable M represents
an instance of <a href="ref/match_results.html" title="match_results"><code class="computeroutput"><span class="identifier">match_results</span></code></a> as filled in by <a href="ref/regex_match.html" title="regex_match"><code class="computeroutput"><span class="identifier">regex_match</span></code></a>,
<a href="ref/regex_search.html" title="regex_search"><code class="computeroutput"><span class="identifier">regex_search</span></code></a>
or <a href="ref/deprecated_interfaces/regex_grep.html" title="regex_grep (Deprecated)"><code class="computeroutput"><span class="identifier">regex_grep</span></code></a>):
an instance of <a href="ref/match_results.html" title=" match_results"><tt class="computeroutput"><span class="identifier">match_results</span></tt></a> as filled in by <a href="ref/regex_match.html" title=" regex_match"><tt class="computeroutput"><span class="identifier">regex_match</span></tt></a>,
<a href="ref/regex_search.html" title=" regex_search"><tt class="computeroutput"><span class="identifier">regex_search</span></tt></a>
or <a href="ref/deprecated_interfaces/regex_grep.html" title="
regex_grep (Deprecated)"><tt class="computeroutput"><span class="identifier">regex_grep</span></tt></a>):
</p>
<div class="informaltable"><table class="table">
<colgroup>
@ -184,7 +186,7 @@
<p>
The following example tests to see whether the text could be a valid credit
card number, as the user presses a key, the character entered would be added
to the string being built up, and passed to <code class="computeroutput"><span class="identifier">is_possible_card_number</span></code>.
to the string being built up, and passed to <tt class="computeroutput"><span class="identifier">is_possible_card_number</span></tt>.
If this returns true then the text could be a valid card number, so the user
interface's OK button would be enabled. If it returns false, then this is not
yet a valid card number, but could be with more input, so the user interface
@ -295,7 +297,10 @@
</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>
<hr>
<div class="spirit-nav">