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revision 167 by ph10, Wed May 9 15:53:54 2007 UTC revision 212 by ph10, Thu Aug 9 11:16:34 2007 UTC
# Line 2  News about PCRE releases Line 2  News about PCRE releases
2  ------------------------  ------------------------
3    
4    
5  Release 7.2 30-Apr-07  Release 7.3 09-Aug-07
6  ---------------------  ---------------------
7    
8    Most changes are bug fixes. Some that are not:
9    
10    1. There is some support for Perl 5.10's experimental "backtracking control
11       verbs" such as (*PRUNE).
12    
13    2. UTF-8 checking is now as per RFC 3629 instead of RFC 2279; this is more
14       restrictive in the strings it accepts.
15    
16    3. Checking for potential integer overflow has been made more dynamic, and as a
17       consequence there is no longer a hard limit on the size of a subpattern that
18       has a limited repeat count.
19    
20    
21    Release 7.2 19-Jun-07
22    ---------------------
23    
24    WARNING: saved patterns that were compiled by earlier versions of PCRE must be
25    recompiled for use with 7.2 (necessitated by the addition of \K, \h, \H, \v,
26    and \V).
27    
28  Correction to the notes for 7.1: the note about shared libraries for Windows is  Correction to the notes for 7.1: the note about shared libraries for Windows is
29  wrong. Previously, three libraries were built, but each could function  wrong. Previously, three libraries were built, but each could function
30  independently. For example, the pcreposix library also included all the  independently. For example, the pcreposix library also included all the
# Line 16  the basic pcre library. Line 36  the basic pcre library.
36  Some more features from Perl 5.10 have been added:  Some more features from Perl 5.10 have been added:
37    
38    (?-n) and (?+n) relative references for recursion and subroutines.    (?-n) and (?+n) relative references for recursion and subroutines.
39    
40    (Not sure if this one is actually in Perl 5.10)    (?(-n) and (?(+n) relative references as conditions.
41    (?(-n) and (?(+n) relative references as conditions.  
42      \k{name} and \g{name} are synonyms for \k<name>.
43    
44      \K to reset the start of the matched string; for example, (foo)\Kbar
45      matches bar preceded by foo, but only sets bar as the matched string.
46    
47      (?| introduces a group where the capturing parentheses in each alternative
48      start from the same number; for example, (?|(abc)|(xyz)) sets capturing
49      parentheses number 1 in both cases.
50    
51      \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
52    
53    
54  Release 7.1 24-Apr-07  Release 7.1 24-Apr-07

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