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revision 175 by ph10, Mon Jun 11 13:38:38 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    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  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).  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
# Line 20  Some more features from Perl 5.10 have b Line 37  Some more features from Perl 5.10 have b
37    
38    (?-n) and (?+n) relative references for recursion and subroutines.    (?-n) and (?+n) relative references for recursion and subroutines.
39    
   (Not sure if this one is actually in Perl 5.10)  
40    (?(-n) and (?(+n) relative references as conditions.    (?(-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    \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.    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    (?| introduces a group where the capturing parentheses in each alternative
48    start from the same number; for example, (?|(abc)|(xyz)) sets capturing    start from the same number; for example, (?|(abc)|(xyz)) sets capturing
49    parentheses number 1 in both cases.    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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