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revision 157 by ph10, Tue May 1 09:19:56 2007 UTC revision 228 by ph10, Tue Aug 28 13:37:37 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 28-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    4. When CRLF is a valid line-ending sequence, pcre_exec() and pcre_dfa_exec()
21       no longer advance by two characters instead of one when an unanchored match
22       fails at CRLF if there are explicit CR or LF matches within the pattern.
23       This gets rid of some anomalous effects that previously occurred.
24    
25    5. Some PCRE-specific settings for varying the newline options at the start of
26       a pattern have been added.
27    
28    
29    Release 7.2 19-Jun-07
30    ---------------------
31    
32    WARNING: saved patterns that were compiled by earlier versions of PCRE must be
33    recompiled for use with 7.2 (necessitated by the addition of \K, \h, \H, \v,
34    and \V).
35    
36    Correction to the notes for 7.1: the note about shared libraries for Windows is
37    wrong. Previously, three libraries were built, but each could function
38    independently. For example, the pcreposix library also included all the
39    functions from the basic pcre library. The change is that the three libraries
40    are no longer independent. They are like the Unix libraries. To use the
41    pcreposix functions, for example, you need to link with both the pcreposix and
42  the basic pcre library.  the basic pcre library.
43    
44    Some more features from Perl 5.10 have been added:
45    
46      (?-n) and (?+n) relative references for recursion and subroutines.
47    
48      (?(-n) and (?(+n) relative references as conditions.
49    
50      \k{name} and \g{name} are synonyms for \k<name>.
51    
52      \K to reset the start of the matched string; for example, (foo)\Kbar
53      matches bar preceded by foo, but only sets bar as the matched string.
54    
55      (?| introduces a group where the capturing parentheses in each alternative
56      start from the same number; for example, (?|(abc)|(xyz)) sets capturing
57      parentheses number 1 in both cases.
58    
59      \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
60    
61    
62  Release 7.1 24-Apr-07  Release 7.1 24-Apr-07
63  ---------------------  ---------------------

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