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  1. <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>The SEQ_REGEXP Tag</title><meta name="generator" content="DocBook XSL Stylesheets V1.65.1"><link rel="home" href="index.html" title="jEdit 4.2 User's Guide"><link rel="up" href="writing-modes.html" title="Chapter 10. Mode Definition Syntax"><link rel="previous" href="mode-rule-seq.html" title="The SEQ Tag"><link rel="next" href="mode-rule-import.html" title="The IMPORT Tag"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">The SEQ_REGEXP Tag</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="mode-rule-seq.html">Prev</a> </td><th width="60%" align="center">Chapter 10. Mode Definition Syntax</th><td width="20%" align="right"> <a accesskey="n" href="mode-rule-import.html">Next</a></td></tr></table><hr></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="mode-rule-seq-regexp"></a>The SEQ_REGEXP Tag</h2></div></div><div></div></div><p>
    2. 

  2.    The <tt class="literal">SEQ_REGEXP</tt> rule is similar to the
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  3.    <tt class="literal">SEQ</tt> rule except the match sequence is taken to be
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  4.    a regular expression. In addition to the attributes supported by
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  5.    the <tt class="literal">SEQ</tt> tag, the
    6. 

  6.    <tt class="literal">HASH_CHAR</tt> attribute must be specified. It must be set to
    7. 

  7.    the first character that
    8. 

  8.    the regular expression matches. This rules out using regular expressions
    9. 

  9.    which can match more than one character at the start position. The regular expression match cannot span more than one line, either.
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  10.   </p><p>
    11. 

  11.    Here is an example of a <tt class="literal">SEQ_REGEXP</tt> rule that highlights
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  12.    Perl's matcher constructions such as <tt class="literal">m/(.+):(\d+):(.+)/</tt>:
    13. 

  13.   </p><table border="0" bgcolor="#E0E0E0"><tr><td><pre class="programlisting">&lt;SEQ_REGEXP TYPE="MARKUP"
    14. 

  14.     HASH_CHAR="m"
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  15.     AT_WORD_START="TRUE"
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  16. &gt;m([[:punct:]])(?:.*?[^\\])*?\1[sgiexom]*&lt;/SEQ_REGEXP&gt;</pre></td></tr></table><p>
    17. 

  17.    Regular expression syntax is described in <a href="regexps.html" title="Appendix E. Regular Expressions">Appendix E, <i>Regular Expressions</i></a>.
    18. 

  18.   </p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="mode-rule-seq.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="writing-modes.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="mode-rule-import.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">The SEQ Tag </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> The IMPORT Tag</td></tr></table></div></body></html>
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