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revision 172 by ph10, Tue Jun 5 10:40:13 2007 UTC revision 489 by ph10, Tue Jan 19 16:42:21 2010 UTC
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1  News about PCRE releases  News about PCRE releases
2  ------------------------  ------------------------
3    
4    Release 8.01 19-Jan-2010
5    ------------------------
6    
7    This is a bug-fix release. Several bugs in the code itself and some bugs and
8    infelicities in the build system have been fixed.
9    
10    
11    Release 8.00 19-Oct-09
12    ----------------------
13    
14    Bugs have been fixed in the library and in pcregrep. There are also some
15    enhancements. Restrictions on patterns used for partial matching have been
16    removed, extra information is given for partial matches, the partial matching
17    process has been improved, and an option to make a partial match override a
18    full match is available. The "study" process has been enhanced by finding a
19    lower bound matching length. Groups with duplicate numbers may now have
20    duplicated names without the use of PCRE_DUPNAMES. However, they may not have
21    different names. The documentation has been revised to reflect these changes.
22    The version number has been expanded to 3 digits as it is clear that the rate
23    of change is not slowing down.
24    
25    
26    Release 7.9 11-Apr-09
27    ---------------------
28    
29    Mostly bugfixes and tidies with just a couple of minor functional additions.
30    
31    
32    Release 7.8 05-Sep-08
33    ---------------------
34    
35    More bug fixes, plus a performance improvement in Unicode character property
36    lookup.
37    
38    
39    Release 7.7 07-May-08
40    ---------------------
41    
42    This is once again mainly a bug-fix release, but there are a couple of new
43    features.
44    
45    
46    Release 7.6 28-Jan-08
47    ---------------------
48    
49    The main reason for having this release so soon after 7.5 is because it fixes a
50    potential buffer overflow problem in pcre_compile() when run in UTF-8 mode. In
51    addition, the CMake configuration files have been brought up to date.
52    
53  Release 7.2 30-Apr-07  
54    Release 7.5 10-Jan-08
55    ---------------------
56    
57    This is mainly a bug-fix release. However the ability to link pcregrep with
58    libz or libbz2 and the ability to link pcretest with libreadline have been
59    added. Also the --line-offsets and --file-offsets options were added to
60    pcregrep.
61    
62    
63    Release 7.4 21-Sep-07
64    ---------------------
65    
66    The only change of specification is the addition of options to control whether
67    \R matches any Unicode line ending (the default) or just CR, LF, and CRLF.
68    Otherwise, the changes are bug fixes and a refactoring to reduce the number of
69    relocations needed in a shared library. There have also been some documentation
70    updates, in particular, some more information about using CMake to build PCRE
71    has been added to the NON-UNIX-USE file.
72    
73    
74    Release 7.3 28-Aug-07
75    ---------------------
76    
77    Most changes are bug fixes. Some that are not:
78    
79    1. There is some support for Perl 5.10's experimental "backtracking control
80       verbs" such as (*PRUNE).
81    
82    2. UTF-8 checking is now as per RFC 3629 instead of RFC 2279; this is more
83       restrictive in the strings it accepts.
84    
85    3. Checking for potential integer overflow has been made more dynamic, and as a
86       consequence there is no longer a hard limit on the size of a subpattern that
87       has a limited repeat count.
88    
89    4. When CRLF is a valid line-ending sequence, pcre_exec() and pcre_dfa_exec()
90       no longer advance by two characters instead of one when an unanchored match
91       fails at CRLF if there are explicit CR or LF matches within the pattern.
92       This gets rid of some anomalous effects that previously occurred.
93    
94    5. Some PCRE-specific settings for varying the newline options at the start of
95       a pattern have been added.
96    
97    
98    Release 7.2 19-Jun-07
99  ---------------------  ---------------------
100    
101  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
102  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,
103    and \V).
104    
105  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
106  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 114  Some more features from Perl 5.10 have b
114    
115    (?-n) and (?+n) relative references for recursion and subroutines.    (?-n) and (?+n) relative references for recursion and subroutines.
116    
   (Not sure if this one is actually in Perl 5.10)  
117    (?(-n) and (?(+n) relative references as conditions.    (?(-n) and (?(+n) relative references as conditions.
118    
119      \k{name} and \g{name} are synonyms for \k<name>.
120    
121    \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
122    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.
123    
124      (?| introduces a group where the capturing parentheses in each alternative
125      start from the same number; for example, (?|(abc)|(xyz)) sets capturing
126      parentheses number 1 in both cases.
127    
128      \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
129    
130    
131  Release 7.1 24-Apr-07  Release 7.1 24-Apr-07

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