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revision 197 by ph10, Tue Jul 31 10:50:18 2007 UTC revision 208 by ph10, Mon Aug 6 15:23:29 2007 UTC
# Line 47  and Line 47  and
47  .\" HREF  .\" HREF
48  \fBpcrecompat\fR  \fBpcrecompat\fR
49  .\"  .\"
50  pages.  pages. There is a syntax summary in the
51    .\" HREF
52    \fBpcresyntax\fR
53    .\"
54    page.
55  .P  .P
56  Some features of PCRE can be included, excluded, or changed when the library is  Some features of PCRE can be included, excluded, or changed when the library is
57  built. The  built. The
# Line 93  follows: Line 97  follows:
97  .\" JOIN  .\" JOIN
98    pcrepattern       syntax and semantics of supported    pcrepattern       syntax and semantics of supported
99                        regular expressions                        regular expressions
100      pcresyntax        quick syntax reference
101    pcreperform       discussion of performance issues    pcreperform       discussion of performance issues
102    pcreposix         the POSIX-compatible C API    pcreposix         the POSIX-compatible C API
103    pcreprecompile    details of saving and re-using precompiled patterns    pcreprecompile    details of saving and re-using precompiled patterns
# Line 121  distribution and the Line 126  distribution and the
126  documentation for details). In these cases the limit is substantially larger.  documentation for details). In these cases the limit is substantially larger.
127  However, the speed of execution is slower.  However, the speed of execution is slower.
128  .P  .P
129  All values in repeating quantifiers must be less than 65536. The maximum  All values in repeating quantifiers must be less than 65536.
 compiled length of subpattern with an explicit repeat count is 30000 bytes. The  
 maximum number of capturing subpatterns is 65535.  
130  .P  .P
131  There is no limit to the number of parenthesized subpatterns, but there can be  There is no limit to the number of parenthesized subpatterns, but there can be
132  no more than 65535 capturing subpatterns.  no more than 65535 capturing subpatterns.
133  .P  .P
 If a non-capturing subpattern with an unlimited repetition quantifier can match  
 an empty string, there is a limit of 1000 on the number of times it can be  
 repeated while not matching an empty string - if it does match an empty  
 string, the loop is immediately broken.  
 .P  
134  The maximum length of name for a named subpattern is 32 characters, and the  The maximum length of name for a named subpattern is 32 characters, and the
135  maximum number of named subpatterns is 10000.  maximum number of named subpatterns is 10000.
136  .P  .P
# Line 256  two digits 10, at the domain cam.ac.uk. Line 254  two digits 10, at the domain cam.ac.uk.
254  .rs  .rs
255  .sp  .sp
256  .nf  .nf
257  Last updated: 30 July 2007  Last updated: 06 August 2007
258  Copyright (c) 1997-2007 University of Cambridge.  Copyright (c) 1997-2007 University of Cambridge.
259  .fi  .fi
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