Add VT to the set of characters recognized as white space.

git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1364 2f5784b3-3f2a-0410-8824-cb99058d5e15

3 files changed, 25 insertions, 20 deletions

diff --git a/doc/pcreapi.3 b/doc/pcreapi.3
index 90c7787..6e28bd1 100644
--- a/doc/pcreapi.3
+++ b/doc/pcreapi.3
@@ -1,4 +1,4 @@
-.TH PCREAPI 3 "01 October 2013" "PCRE 8.34"
+.TH PCREAPI 3 "05 October 2013" "PCRE 8.34"
 .SH NAME
 PCRE - Perl-compatible regular expressions
 .sp
@@ -645,11 +645,14 @@ documentation.
   PCRE_EXTENDED
 .sp
 If this bit is set, white space data characters in the pattern are totally
-ignored except when escaped or inside a character class. White space does not
-include the VT character (code 11). In addition, characters between an
-unescaped # outside a character class and the next newline, inclusive, are also
-ignored. This is equivalent to Perl's /x option, and it can be changed within a
-pattern by a (?x) option setting.
+ignored except when escaped or inside a character class. White space did not
+used to include the VT character (code 11), because Perl did not treat this 
+character as white space. However, Perl changed at release 5.18, so PCRE
+followed at release 8.34, and VT is now treated as white space. PCRE_EXTENDED
+also causes characters between an unescaped # outside a character class and the
+next newline, inclusive, to be ignored. PCRE_EXTENDED is equivalent to
+Perl's /x option, and it can be changed within a pattern by a (?x) option
+setting.
 .P
 Which characters are interpreted as newlines is controlled by the options
 passed to \fBpcre_compile()\fP or by a special sequence at the start of the
@@ -2863,6 +2866,6 @@ Cambridge CB2 3QH, England.
 .rs
 .sp
 .nf
-Last updated: 01 October 2013
+Last updated: 05 October 2013
 Copyright (c) 1997-2013 University of Cambridge.
 .fi
diff --git a/doc/pcrepattern.3 b/doc/pcrepattern.3
index 07365f5..3c3980d 100644
--- a/doc/pcrepattern.3
+++ b/doc/pcrepattern.3
@@ -1,4 +1,4 @@
-.TH PCREPATTERN 3 "06 September 2013" "PCRE 8.34"
+.TH PCREPATTERN 3 "05 October 2013" "PCRE 8.34"
 .SH NAME
 PCRE - Perl-compatible regular expressions
 .SH "PCRE REGULAR EXPRESSION DETAILS"
@@ -494,11 +494,10 @@ classes. They each match one character of the appropriate type. If the current
 matching point is at the end of the subject string, all of them fail, because
 there is no character to match.
 .P
-For compatibility with Perl, \es does not match the VT character (code 11).
-This makes it different from the the POSIX "space" class. The \es characters
-are HT (9), LF (10), FF (12), CR (13), and space (32). If "use locale;" is
-included in a Perl script, \es may match the VT character. In PCRE, it never
-does.
+For compatibility with Perl, \es did not used to match the VT character (code
+11), which made it different from the the POSIX "space" class. However, Perl
+added VT at release 5.18, and PCRE followed suit at release 8.34. The \es
+characters are now HT (9), LF (10), VT (11), FF (12), CR (13), and space (32).
 .P
 A "word" character is an underscore or any character that is a letter or digit.
 By default, the definition of letters and digits is controlled by PCRE's
@@ -1296,9 +1295,9 @@ are:
   xdigit   hexadecimal digits
 .sp
 The "space" characters are HT (9), LF (10), VT (11), FF (12), CR (13), and
-space (32). Notice that this list includes the VT character (code 11). This
-makes "space" different to \es, which does not include VT (for Perl
-compatibility).
+space (32). "Space" used to be different to \es, which did not include VT, for
+Perl compatibility. However, Perl changed at release 5.18, and PCRE followed at
+release 8.34. "Space" and \es now match the same set of characters.
 .P
 The name "word" is a Perl extension, and "blank" is a GNU extension from Perl
 5.8. Another Perl extension is negation, which is indicated by a ^ character
@@ -3157,6 +3156,6 @@ Cambridge CB2 3QH, England.
 .rs
 .sp
 .nf
-Last updated: 06 September 2013
+Last updated: 05 October 2013
 Copyright (c) 1997-2013 University of Cambridge.
 .fi
diff --git a/doc/pcresyntax.3 b/doc/pcresyntax.3
index 399bbe2..17d9d51 100644
--- a/doc/pcresyntax.3
+++ b/doc/pcresyntax.3
@@ -1,4 +1,4 @@
-.TH PCRESYNTAX 3 "26 April 2013" "PCRE 8.33"
+.TH PCRESYNTAX 3 "05 October 2013" "PCRE 8.34"
 .SH NAME
 PCRE - Perl-compatible regular expressions
 .SH "PCRE REGULAR EXPRESSION SYNTAX SUMMARY"
@@ -115,10 +115,13 @@ 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"
@@ -495,6 +498,6 @@ Cambridge CB2 3QH, England.
 .rs
 .sp
 .nf
-Last updated: 26 April 2013
+Last updated: 05 October 2013
 Copyright (c) 1997-2013 University of Cambridge.
 .fi