/[pcre]/code/trunk/doc/pcrepattern.3
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revision 1404 by ph10, Tue Nov 19 15:36:57 2013 UTC revision 1405 by ph10, Mon Nov 25 15:09:21 2013 UTC
# Line 1  Line 1 
1  .TH PCREPATTERN 3 "12 November 2013" "PCRE 8.34"  .TH PCREPATTERN 3 "25 November 2013" "PCRE 8.34"
2  .SH NAME  .SH NAME
3  PCRE - Perl-compatible regular expressions  PCRE - Perl-compatible regular expressions
4  .SH "PCRE REGULAR EXPRESSION DETAILS"  .SH "PCRE REGULAR EXPRESSION DETAILS"
# Line 536  For compatibility with Perl, \es did not Line 536  For compatibility with Perl, \es did not
536  added VT at release 5.18, and PCRE followed suit at release 8.34. The default  added VT at release 5.18, and PCRE followed suit at release 8.34. The default
537  \es characters are now HT (9), LF (10), VT (11), FF (12), CR (13), and space  \es characters are now HT (9), LF (10), VT (11), FF (12), CR (13), and space
538  (32), which are defined as white space in the "C" locale. This list may vary if  (32), which are defined as white space in the "C" locale. This list may vary if
539  locale-specific matching is taking place; in particular, in some locales the  locale-specific matching is taking place. For example, in some locales the
540  "non-breaking space" character (\exA0) is recognized as white space.  "non-breaking space" character (\exA0) is recognized as white space, and in
541    others the VT character is not.
542  .P  .P
543  A "word" character is an underscore or any character that is a letter or digit.  A "word" character is an underscore or any character that is a letter or digit.
544  By default, the definition of letters and digits is controlled by PCRE's  By default, the definition of letters and digits is controlled by PCRE's
# Line 1345  are: Line 1346  are:
1346    xdigit   hexadecimal digits    xdigit   hexadecimal digits
1347  .sp  .sp
1348  The default "space" characters are HT (9), LF (10), VT (11), FF (12), CR (13),  The default "space" characters are HT (9), LF (10), VT (11), FF (12), CR (13),
1349  and space (32). If locale-specific matching is taking place, there may be  and space (32). If locale-specific matching is taking place, the list of space
1350  additional space characters. "Space" used to be different to \es, which did not  characters may be different; there may be fewer or more of them. "Space" used
1351  include VT, for Perl compatibility. However, Perl changed at release 5.18, and  to be different to \es, which did not include VT, for Perl compatibility.
1352  PCRE followed at release 8.34. "Space" and \es now match the same set of  However, Perl changed at release 5.18, and PCRE followed at release 8.34.
1353  characters.  "Space" and \es now match the same set of characters.
1354  .P  .P
1355  The name "word" is a Perl extension, and "blank" is a GNU extension from Perl  The name "word" is a Perl extension, and "blank" is a GNU extension from Perl
1356  5.8. Another Perl extension is negation, which is indicated by a ^ character  5.8. Another Perl extension is negation, which is indicated by a ^ character
# Line 3230  Cambridge CB2 3QH, England. Line 3231  Cambridge CB2 3QH, England.
3231  .rs  .rs
3232  .sp  .sp
3233  .nf  .nf
3234  Last updated: 12 November 2013  Last updated: 25 November 2013
3235  Copyright (c) 1997-2013 University of Cambridge.  Copyright (c) 1997-2013 University of Cambridge.
3236  .fi  .fi
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