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revision 207 by ph10, Mon Aug 6 09:32:14 2007 UTC revision 208 by ph10, Mon Aug 6 15:23:29 2007 UTC
# Line 64  Version 7.3 05-Jul-07 Line 64  Version 7.3 05-Jul-07
64      dynamic way, which I have now done. The artificial limitation on group      dynamic way, which I have now done. The artificial limitation on group
65      length has been removed - we now have only the limit on the total length of      length has been removed - we now have only the limit on the total length of
66      the compiled pattern, which depends on the LINK_SIZE setting.      the compiled pattern, which depends on the LINK_SIZE setting.
67    
68  10. Fixed a bug in the documentation for get/copy named substring when  10. Fixed a bug in the documentation for get/copy named substring when
69      duplicate names are permitted. If none of the named substrings are set, the      duplicate names are permitted. If none of the named substrings are set, the
70      functions return PCRE_ERROR_NOSUBSTRING (7); the doc said they returned an      functions return PCRE_ERROR_NOSUBSTRING (7); the doc said they returned an
71      empty string.      empty string.
72    
73  11. Because Perl interprets \Q...\E at a high level, and ignores orphan \E  11. Because Perl interprets \Q...\E at a high level, and ignores orphan \E
74      instances, patterns such as [\Q\E] or [\E] or even [^\E] cause an error,      instances, patterns such as [\Q\E] or [\E] or even [^\E] cause an error,
75      because the ] is interpreted as the first data character and the      because the ] is interpreted as the first data character and the
76      terminating ] is not found. PCRE has been made compatible with Perl in this      terminating ] is not found. PCRE has been made compatible with Perl in this
77      regard. Previously, it interpreted [\Q\E] as an empty class, and [\E] could      regard. Previously, it interpreted [\Q\E] as an empty class, and [\E] could
78      cause memory overwriting.      cause memory overwriting.
79    
80  10. Like Perl, PCRE automatically breaks an unlimited repeat after an empty  10. Like Perl, PCRE automatically breaks an unlimited repeat after an empty
81      string has been matched (to stop an infinite loop). It was not recognizing      string has been matched (to stop an infinite loop). It was not recognizing
82      a conditional subpattern that could match an empty string if that      a conditional subpattern that could match an empty string if that
83      subpattern was within another subpattern. For example, it looped when      subpattern was within another subpattern. For example, it looped when
84      trying to match  (((?(1)X|))*)  but it was OK with  ((?(1)X|)*)  where the      trying to match  (((?(1)X|))*)  but it was OK with  ((?(1)X|)*)  where the
85      condition was not nested. This bug has been fixed.      condition was not nested. This bug has been fixed.
86    
87  12. A pattern like \X?\d or \P{L}?\d in non-UTF-8 mode could cause a backtrack  12. A pattern like \X?\d or \P{L}?\d in non-UTF-8 mode could cause a backtrack
88      past the start of the subject in the presence of bytes with the top bit      past the start of the subject in the presence of bytes with the top bit
89      set, for example "\x8aBCD".      set, for example "\x8aBCD".

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