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revision 713 by ph10, Tue Sep 27 11:03:15 2011 UTC revision 723 by ph10, Sat Oct 8 15:55:23 2011 UTC
# Line 52  Version 8.20 23-Sep-2011 Line 52  Version 8.20 23-Sep-2011
52      so that no minimum is registered for a pattern that contains *ACCEPT.      so that no minimum is registered for a pattern that contains *ACCEPT.
53    
54  8.  If (*THEN) was present in the first (true) branch of a conditional group,  8.  If (*THEN) was present in the first (true) branch of a conditional group,
55      it was not handled as intended.      it was not handled as intended. [But see 16 below.]
56    
57  9.  Replaced RunTest.bat with the much improved version provided by Sheri  9.  Replaced RunTest.bat and CMakeLists.txt with improved versions provided by
58      Pierce.      Sheri Pierce.
59    
60  10. A pathological pattern such as /(*ACCEPT)a/ was miscompiled, thinking that  10. A pathological pattern such as /(*ACCEPT)a/ was miscompiled, thinking that
61      the first byte in a match must be "a".      the first byte in a match must be "a".
# Line 74  Version 8.20 23-Sep-2011 Line 74  Version 8.20 23-Sep-2011
74      For "fr", it uses the Windows-specific input and output files.      For "fr", it uses the Windows-specific input and output files.
75    
76  14. If (*THEN) appeared in a group that was called recursively or as a  14. If (*THEN) appeared in a group that was called recursively or as a
77      subroutine, it did not work as intended.      subroutine, it did not work as intended. [But see next item.]
78    
79    15. Consider the pattern /A (B(*THEN)C) | D/ where A, B, C, and D are complex
80        pattern fragments (but not containing any | characters). If A and B are
81        matched, but there is a failure in C so that it backtracks to (*THEN), PCRE
82        was behaving differently to Perl. PCRE backtracked into A, but Perl goes to
83        D. In other words, Perl considers parentheses that do not contain any |
84        characters to be part of a surrounding alternative, whereas PCRE was
85        treading (B(*THEN)C) the same as (B(*THEN)C|(*FAIL)) -- which Perl handles
86        differently. PCRE now behaves in the same way as Perl, except in the case
87        of subroutine/recursion calls such as (?1) which have in any case always
88        been different (but PCRE had them first :-).
89    
90    16. Related to 15 above: Perl does not treat the | in a conditional group as
91        creating alternatives. Such a group is treated in the same way as an
92        ordinary group without any | characters when processing (*THEN). PCRE has
93        been changed to match Perl's behaviour.
94    
95    17. If a user had set PCREGREP_COLO(U)R to something other than 1:31, the
96        RunGrepTest script failed.
97    
98    18. Change 22 for version 13 caused atomic groups to use more stack. This is
99        inevitable for groups that contain captures, but it can lead to a lot of
100        stack use in large patterns. The old behaviour has been restored for atomic
101        groups that do not contain any capturing parentheses.
102    
103    
104  Version 8.13 16-Aug-2011  Version 8.13 16-Aug-2011

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