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revision 157 by ph10, Tue May 1 09:19:56 2007 UTC revision 220 by ph10, Thu Aug 16 13:29:39 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 16-Aug-07
6  ---------------------  ---------------------
7    
8  Correction to the notes for 7.1: the note about shared libraries for Windows is  Most changes are bug fixes. Some that are not:
9  wrong. Previously, three libraries were built, but each could function  
10  independently. For example, the pcreposix library also included all the  1. There is some support for Perl 5.10's experimental "backtracking control
11  functions from the basic pcre library. The change is that the three libraries     verbs" such as (*PRUNE).
12  are no longer independent. They are like the Unix libraries. To use the  
13  pcreposix functions, for example, you need to link with both the pcreposix and  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
29    wrong. Previously, three libraries were built, but each could function
30    independently. For example, the pcreposix library also included all the
31    functions from the basic pcre library. The change is that the three libraries
32    are no longer independent. They are like the Unix libraries. To use the
33    pcreposix functions, for example, you need to link with both the pcreposix and
34  the basic pcre library.  the basic pcre library.
35    
36    Some more features from Perl 5.10 have been added:
37    
38      (?-n) and (?+n) relative references for recursion and subroutines.
39    
40      (?(-n) and (?(+n) relative references as conditions.
41    
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
55  ---------------------  ---------------------

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