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revision 181 by ph10, Wed Jun 13 14:55:18 2007 UTC revision 226 by ph10, Tue Aug 21 11:46:08 2007 UTC
# Line 2  News about PCRE releases Line 2  News about PCRE releases
2  ------------------------  ------------------------
3    
4    
5  Release 7.2 13-Jun-07  Release 7.3 20-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    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    
26    Release 7.2 19-Jun-07
27  ---------------------  ---------------------
28    
29  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
# Line 22  Some more features from Perl 5.10 have b Line 43  Some more features from Perl 5.10 have b
43    (?-n) and (?+n) relative references for recursion and subroutines.    (?-n) and (?+n) relative references for recursion and subroutines.
44    
45    (?(-n) and (?(+n) relative references as conditions.    (?(-n) and (?(+n) relative references as conditions.
46    
47    \k{name} and \g{name} are synonyms for \k<name>.    \k{name} and \g{name} are synonyms for \k<name>.
48    
49    \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
50    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.
51    
52    (?| introduces a group where the capturing parentheses in each alternative    (?| introduces a group where the capturing parentheses in each alternative
53    start from the same number; for example, (?|(abc)|(xyz)) sets capturing    start from the same number; for example, (?|(abc)|(xyz)) sets capturing
54    parentheses number 1 in both cases.    parentheses number 1 in both cases.
55    
56    \h, \H, \v, \V match horizontal and vertical whitespace, respectively.    \h, \H, \v, \V match horizontal and vertical whitespace, respectively.
57    
58    
59  Release 7.1 24-Apr-07  Release 7.1 24-Apr-07

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