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revision 429 by ph10, Tue Sep 1 16:10:16 2009 UTC revision 453 by ph10, Fri Sep 18 19:12:35 2009 UTC
# Line 116  character of the subject. The algorithm Line 116  character of the subject. The algorithm
116  matches that start at later positions.  matches that start at later positions.
117  </P>  </P>
118  <P>  <P>
119    Although the general principle of this matching algorithm is that it scans the
120    subject string only once, without backtracking, there is one exception: when a
121    lookbehind assertion is encountered, the preceding characters have to be
122    re-inspected.
123    </P>
124    <P>
125  There are a number of features of PCRE regular expressions that are not  There are a number of features of PCRE regular expressions that are not
126  supported by the alternative matching algorithm. They are as follows:  supported by the alternative matching algorithm. They are as follows:
127  </P>  </P>
# Line 209  Cambridge CB2 3QH, England. Line 215  Cambridge CB2 3QH, England.
215  </P>  </P>
216  <br><a name="SEC8" href="#TOC1">REVISION</a><br>  <br><a name="SEC8" href="#TOC1">REVISION</a><br>
217  <P>  <P>
218  Last updated: 25 August 2009  Last updated: 05 September 2009
219  <br>  <br>
220  Copyright &copy; 1997-2009 University of Cambridge.  Copyright &copy; 1997-2009 University of Cambridge.
221  <br>  <br>

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