/[pcre]/code/trunk/doc/pcrecompat.3
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revision 452 by ph10, Wed Sep 16 10:56:40 2009 UTC revision 453 by ph10, Fri Sep 18 19:12:35 2009 UTC
# Line 69  The \eQ...\eE sequence is recognized bot Line 69  The \eQ...\eE sequence is recognized bot
69  .P  .P
70  8. Fairly obviously, PCRE does not support the (?{code}) and (??{code})  8. Fairly obviously, PCRE does not support the (?{code}) and (??{code})
71  constructions. However, there is support for recursive patterns. This is not  constructions. However, there is support for recursive patterns. This is not
72  available in Perl 5.8, but will be in Perl 5.10. Also, the PCRE "callout"  available in Perl 5.8, but it is in Perl 5.10. Also, the PCRE "callout"
73  feature allows an external function to be called during pattern matching. See  feature allows an external function to be called during pattern matching. See
74  the  the
75  .\" HREF  .\" HREF
# Line 78  the Line 78  the
78  documentation for details.  documentation for details.
79  .P  .P
80  9. Subpatterns that are called recursively or as "subroutines" are always  9. Subpatterns that are called recursively or as "subroutines" are always
81  treated as atomic groups in PCRE. This is like Python, but unlike Perl.  treated as atomic groups in PCRE. This is like Python, but unlike Perl. There
82    is a discussion of an example that explains this in more detail in the
83    .\" HTML <a href="pcrepattern.html#recursiondifference">
84    .\" </a>
85    section on recursion differences from Perl
86    .\"
87    in the
88    .\" HREF
89    \fBpcrecompat\fP
90    .\"
91    page.
92  .P  .P
93  10. There are some differences that are concerned with the settings of captured  10. There are some differences that are concerned with the settings of captured
94  strings when part of a pattern is repeated. For example, matching "aba" against  strings when part of a pattern is repeated. For example, matching "aba" against
# Line 145  Cambridge CB2 3QH, England. Line 155  Cambridge CB2 3QH, England.
155  .rs  .rs
156  .sp  .sp
157  .nf  .nf
158  Last updated: 16 September 2009  Last updated: 18 September 2009
159  Copyright (c) 1997-2009 University of Cambridge.  Copyright (c) 1997-2009 University of Cambridge.
160  .fi  .fi

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