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revision 172 by ph10, Tue Jun 5 10:40:13 2007 UTC revision 411 by ph10, Fri Apr 10 15:40:21 2009 UTC
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1  News about PCRE releases  News about PCRE releases
2  ------------------------  ------------------------
3    
4    Release 7.9 01-Apr-09
5    ---------------------
6    
7    Mostly bugfixes and tidies with just a couple of minor functional additions.
8    
9    
10    Release 7.8 05-Sep-08
11    ---------------------
12    
13    More bug fixes, plus a performance improvement in Unicode character property
14    lookup.
15    
16    
17    Release 7.7 07-May-08
18    ---------------------
19    
20  Release 7.2 30-Apr-07  This is once again mainly a bug-fix release, but there are a couple of new
21    features.
22    
23    
24    Release 7.6 28-Jan-08
25    ---------------------
26    
27    The main reason for having this release so soon after 7.5 is because it fixes a
28    potential buffer overflow problem in pcre_compile() when run in UTF-8 mode. In
29    addition, the CMake configuration files have been brought up to date.
30    
31    
32    Release 7.5 10-Jan-08
33    ---------------------
34    
35    This is mainly a bug-fix release. However the ability to link pcregrep with
36    libz or libbz2 and the ability to link pcretest with libreadline have been
37    added. Also the --line-offsets and --file-offsets options were added to
38    pcregrep.
39    
40    
41    Release 7.4 21-Sep-07
42    ---------------------
43    
44    The only change of specification is the addition of options to control whether
45    \R matches any Unicode line ending (the default) or just CR, LF, and CRLF.
46    Otherwise, the changes are bug fixes and a refactoring to reduce the number of
47    relocations needed in a shared library. There have also been some documentation
48    updates, in particular, some more information about using CMake to build PCRE
49    has been added to the NON-UNIX-USE file.
50    
51    
52    Release 7.3 28-Aug-07
53    ---------------------
54    
55    Most changes are bug fixes. Some that are not:
56    
57    1. There is some support for Perl 5.10's experimental "backtracking control
58       verbs" such as (*PRUNE).
59    
60    2. UTF-8 checking is now as per RFC 3629 instead of RFC 2279; this is more
61       restrictive in the strings it accepts.
62    
63    3. Checking for potential integer overflow has been made more dynamic, and as a
64       consequence there is no longer a hard limit on the size of a subpattern that
65       has a limited repeat count.
66    
67    4. When CRLF is a valid line-ending sequence, pcre_exec() and pcre_dfa_exec()
68       no longer advance by two characters instead of one when an unanchored match
69       fails at CRLF if there are explicit CR or LF matches within the pattern.
70       This gets rid of some anomalous effects that previously occurred.
71    
72    5. Some PCRE-specific settings for varying the newline options at the start of
73       a pattern have been added.
74    
75    
76    Release 7.2 19-Jun-07
77  ---------------------  ---------------------
78    
79  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
80  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,
81    and \V).
82    
83  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
84  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 92  Some more features from Perl 5.10 have b
92    
93    (?-n) and (?+n) relative references for recursion and subroutines.    (?-n) and (?+n) relative references for recursion and subroutines.
94    
   (Not sure if this one is actually in Perl 5.10)  
95    (?(-n) and (?(+n) relative references as conditions.    (?(-n) and (?(+n) relative references as conditions.
96    
97      \k{name} and \g{name} are synonyms for \k<name>.
98    
99    \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
100    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.
101    
102      (?| introduces a group where the capturing parentheses in each alternative
103      start from the same number; for example, (?|(abc)|(xyz)) sets capturing
104      parentheses number 1 in both cases.
105    
106      \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
107    
108    
109  Release 7.1 24-Apr-07  Release 7.1 24-Apr-07

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