In /x mode, allow white space before a possessive + character.

git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1396 2f5784b3-3f2a-0410-8824-cb99058d5e15

3 files changed, 25 insertions, 17 deletions

diff --git a/doc/pcreapi.3 b/doc/pcreapi.3
index 6c2576d..1ec0760 100644
--- a/doc/pcreapi.3
+++ b/doc/pcreapi.3
@@ -651,15 +651,22 @@ documentation.
 .sp
   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 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.
+If this bit is set, most white space characters in the pattern are totally
+ignored except when escaped or inside a character class. However, white space
+is not allowed within sequences such as (?> that introduce various
+parenthesized subpatterns, nor within a numerical quantifier such as {1,3}.
+However, ignorable white space is permitted between an item and a following
+quantifier and between a quantifier and a following + that indicates 
+possessiveness.
+.P
+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.
+.P
+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
diff --git a/doc/pcrecompat.3 b/doc/pcrecompat.3
index 1f12cd3..b931efe 100644
--- a/doc/pcrecompat.3
+++ b/doc/pcrecompat.3
@@ -1,4 +1,4 @@
-.TH PCRECOMPAT 3 "05 November 2013" "PCRE 8.34"
+.TH PCRECOMPAT 3 "10 November 2013" "PCRE 8.34"
 .SH NAME
 PCRE - Perl-compatible regular expressions
 .SH "DIFFERENCES BETWEEN PCRE AND PERL"
@@ -122,8 +122,8 @@ an error is given at compile time.
 .P
 15. Perl recognizes comments in some places that PCRE does not, for example,
 between the ( and ? at the start of a subpattern. If the /x modifier is set,
-Perl allows white space between ( and ? but PCRE never does, even if the
-PCRE_EXTENDED option is set.
+Perl allows white space between ( and ? (though current Perls warn that this is 
+deprecated) but PCRE never does, even if the PCRE_EXTENDED option is set.
 .P
 16. Perl, when in warning mode, gives warnings for character classes such as
 [A-\ed] or [a-[:digit:]]. It then treats the hyphens as literals. PCRE has no 
@@ -195,6 +195,6 @@ Cambridge CB2 3QH, England.
 .rs
 .sp
 .nf
-Last updated: 05 November 2013
+Last updated: 10 November 2013
 Copyright (c) 1997-2013 University of Cambridge.
 .fi
diff --git a/doc/pcrepattern.3 b/doc/pcrepattern.3
index 741bb34..367f622 100644
--- a/doc/pcrepattern.3
+++ b/doc/pcrepattern.3
@@ -273,10 +273,11 @@ In a UTF mode, only ASCII numbers and letters have any special meaning after a
 backslash. All other characters (in particular, those whose codepoints are
 greater than 127) are treated as literals.
 .P
-If a pattern is compiled with the PCRE_EXTENDED option, white space in the
-pattern (other than in a character class) and characters between a # outside
-a character class and the next newline are ignored. An escaping backslash can
-be used to include a white space or # character as part of the pattern.
+If a pattern is compiled with the PCRE_EXTENDED option, most white space in the
+pattern (other than in a character class), and characters between a # outside a
+character class and the next newline, inclusive, are ignored. An escaping
+backslash can be used to include a white space or # character as part of the
+pattern.
 .P
 If you want to remove the special meaning from a sequence of characters, you
 can do so by putting them between \eQ and \eE. This is different from Perl in