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<?xml version="1.0" encoding="UTF-8"?>
<!--
* Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
* Copyright (C) INRIA -
*
* This file must be used under the terms of the CeCILL.
* This source file is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at
* http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
*
-->
<refentry version="5.0-subset Scilab" xml:id="regexp" xml:lang="en"
xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns:ns4="http://www.w3.org/1999/xhtml"
xmlns:mml="http://www.w3.org/1998/Math/MathML"
xmlns:db="http://docbook.org/ns/docbook">
<info>
<pubdate>$LastChangedDate: 2008-01-16 16:57:13 +0200 (The, 16 Jan
2008)$</pubdate>
</info>
<refnamediv>
<refname>regexp</refname>
<refpurpose>find a substring that matches the regular expression
string</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Calling Sequence</title>
<synopsis>[start]=regexp(input,pattern,[flag])
[start,end,match]=regexp(input,pattern,[flag])
[start,end]=regexp(input,pattern,[flag])
[start,end,match]=regexp(input,pattern,[flag])</synopsis>
</refsynopsisdiv>
<refsection>
<title>Arguments</title>
<variablelist>
<varlistentry>
<term>input</term>
<listitem>
<para>a string.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>pattern</term>
<listitem>
<para>a character string (under the rules of regular
expression)</para>
</listitem>
</varlistentry>
<varlistentry>
<term>start</term>
<listitem>
<para>the starting index of each substring of str that matches the
regular expression string pattern</para>
</listitem>
</varlistentry>
<varlistentry>
<term>end</term>
<listitem>
<para>the ending index of each substring of str that matches the
regular expression string pattern</para>
</listitem>
</varlistentry>
<varlistentry>
<term>match</term>
<listitem>
<para>the text of each substring of str that matches
<literal>pattern</literal>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>[flag]</term>
<listitem>
<para>'o' for matching the pattern once .</para>
</listitem>
</varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Description</title>
<para>The rules of regular expression are similar to perl language. For a
quick start , see <ulink
url="http://perldoc.perl.org/perlrequick.html">http://perldoc.perl.org/perlrequick.html</ulink>.
For a more in-depth tutorial on , see <ulink
url="http://perldoc.perl.org/perlretut.html">http://perldoc.perl.org/perlretut.html</ulink>
and for the reference page, see <ulink
url="http://perldoc.perl.org/perlre.html">http://perldoc.perl.org/perlre.html</ulink></para>
<para>A difference with Perl is that matching a position but no character
(for example, with /^/ or /(?=o)/) is a successful match in Perl but not
in Scilab.</para>
</refsection>
<refsection>
<title>Examples</title>
<programlisting role="example"><![CDATA[
regexp('xabyabbbz','/ab*/','o')
regexp('a!','/((((((((((a))))))))))\041/')
regexp('ABCC','/^abc$/i')
regexp('ABC','/ab|cd/i')
[a b c]=regexp('XABYABBBZ','/ab*/i')
]]></programlisting>
</refsection>
<refsection role="see also">
<title>See Also</title>
<simplelist type="inline">
<member><link linkend="strindex">strindex</link></member>
</simplelist>
</refsection>
</refentry>
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