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Diffstat (limited to 'pcre/doc/pcresyntax.3')
| -rw-r--r-- | pcre/doc/pcresyntax.3 | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/pcre/doc/pcresyntax.3 b/pcre/doc/pcresyntax.3 index 399bbe2535a..87f0cead743 100644 --- a/pcre/doc/pcresyntax.3 +++ b/pcre/doc/pcresyntax.3 @@ -1,4 +1,4 @@ -.TH PCRESYNTAX 3 "26 April 2013" "PCRE 8.33" +.TH PCRESYNTAX 3 "12 November 2013" "PCRE 8.34" .SH NAME PCRE - Perl-compatible regular expressions .SH "PCRE REGULAR EXPRESSION SYNTAX SUMMARY" @@ -29,9 +29,14 @@ documentation. This document contains a quick-reference summary of the syntax. \en newline (hex 0A) \er carriage return (hex 0D) \et tab (hex 09) + \e0dd character with octal code 0dd \eddd character with octal code ddd, or backreference + \eo{ddd..} character with octal code ddd.. \exhh character with hex code hh \ex{hhh..} character with hex code hhh.. +.sp +Note that \e0dd is always an octal code, and that \e8 and \e9 are the literal +characters "8" and "9". . . .SH "CHARACTER TYPES" @@ -56,9 +61,11 @@ documentation. This document contains a quick-reference summary of the syntax. \eW a "non-word" character \eX a Unicode extended grapheme cluster .sp -In PCRE, by default, \ed, \eD, \es, \eS, \ew, and \eW recognize only ASCII -characters, even in a UTF mode. However, this can be changed by setting the -PCRE_UCP option. +By default, \ed, \es, and \ew match only ASCII characters, even in UTF-8 mode +or in the 16- bit and 32-bit libraries. However, if locale-specific matching is +happening, \es and \ew may also match characters with code points in the range +128-255. If the PCRE_UCP option is set, the behaviour of these escape sequences +is changed to use Unicode properties and they match many more characters. . . .SH "GENERAL CATEGORY PROPERTIES FOR \ep and \eP" @@ -115,10 +122,13 @@ PCRE_UCP option. .sp Xan Alphanumeric: union of properties L and N Xps POSIX space: property Z or tab, NL, VT, FF, CR - Xsp Perl space: property Z or tab, NL, FF, CR + Xsp Perl space: property Z or tab, NL, VT, FF, CR Xuc Univerally-named character: one that can be represented by a Universal Character Name Xwd Perl word: property Xan or underscore +.sp +Perl and POSIX space are now the same. Perl added VT to its space character set +at release 5.18 and PCRE changed at release 8.34. . . .SH "SCRIPT NAMES FOR \ep AND \eP" @@ -355,6 +365,9 @@ newline-setting options with similar syntax: (*UTF32) set UTF-32 mode: 32-bit library (PCRE_UTF32) (*UTF) set appropriate UTF mode for the library in use (*UCP) set PCRE_UCP (use Unicode properties for \ed etc) +.sp +Note that LIMIT_MATCH and LIMIT_RECURSION can only reduce the value of the +limits set by the caller of pcre_exec(), not increase them. . . .SH "LOOKAHEAD AND LOOKBEHIND ASSERTIONS" @@ -495,6 +508,6 @@ Cambridge CB2 3QH, England. .rs .sp .nf -Last updated: 26 April 2013 +Last updated: 12 November 2013 Copyright (c) 1997-2013 University of Cambridge. .fi |