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revision 172 by ph10, Tue Jun 5 10:40:13 2007 UTC revision 347 by ph10, Wed May 7 16:38:04 2008 UTC
# Line 2  News about PCRE releases Line 2  News about PCRE releases
2  ------------------------  ------------------------
3    
4    
5  Release 7.2 30-Apr-07  Release 7.7 07-May-08
6    ---------------------
7    
8    This is once again mainly a bug-fix release, but there are a couple of new
9    features.
10    
11    
12    Release 7.6 28-Jan-08
13    ---------------------
14    
15    The main reason for having this release so soon after 7.5 is because it fixes a
16    potential buffer overflow problem in pcre_compile() when run in UTF-8 mode. In
17    addition, the CMake configuration files have been brought up to date.
18    
19    
20    Release 7.5 10-Jan-08
21    ---------------------
22    
23    This is mainly a bug-fix release. However the ability to link pcregrep with
24    libz or libbz2 and the ability to link pcretest with libreadline have been
25    added. Also the --line-offsets and --file-offsets options were added to
26    pcregrep.
27    
28    
29    Release 7.4 21-Sep-07
30    ---------------------
31    
32    The only change of specification is the addition of options to control whether
33    \R matches any Unicode line ending (the default) or just CR, LF, and CRLF.
34    Otherwise, the changes are bug fixes and a refactoring to reduce the number of
35    relocations needed in a shared library. There have also been some documentation
36    updates, in particular, some more information about using CMake to build PCRE
37    has been added to the NON-UNIX-USE file.
38    
39    
40    Release 7.3 28-Aug-07
41    ---------------------
42    
43    Most changes are bug fixes. Some that are not:
44    
45    1. There is some support for Perl 5.10's experimental "backtracking control
46       verbs" such as (*PRUNE).
47    
48    2. UTF-8 checking is now as per RFC 3629 instead of RFC 2279; this is more
49       restrictive in the strings it accepts.
50    
51    3. Checking for potential integer overflow has been made more dynamic, and as a
52       consequence there is no longer a hard limit on the size of a subpattern that
53       has a limited repeat count.
54    
55    4. When CRLF is a valid line-ending sequence, pcre_exec() and pcre_dfa_exec()
56       no longer advance by two characters instead of one when an unanchored match
57       fails at CRLF if there are explicit CR or LF matches within the pattern.
58       This gets rid of some anomalous effects that previously occurred.
59    
60    5. Some PCRE-specific settings for varying the newline options at the start of
61       a pattern have been added.
62    
63    
64    Release 7.2 19-Jun-07
65  ---------------------  ---------------------
66    
67  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
68  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,
69    and \V).
70    
71  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
72  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 80  Some more features from Perl 5.10 have b
80    
81    (?-n) and (?+n) relative references for recursion and subroutines.    (?-n) and (?+n) relative references for recursion and subroutines.
82    
   (Not sure if this one is actually in Perl 5.10)  
83    (?(-n) and (?(+n) relative references as conditions.    (?(-n) and (?(+n) relative references as conditions.
84    
85      \k{name} and \g{name} are synonyms for \k<name>.
86    
87    \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
88    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.
89    
90      (?| introduces a group where the capturing parentheses in each alternative
91      start from the same number; for example, (?|(abc)|(xyz)) sets capturing
92      parentheses number 1 in both cases.
93    
94      \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
95    
96    
97  Release 7.1 24-Apr-07  Release 7.1 24-Apr-07

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