Date: 2009-07-27 16:51:57 +0200 (Mon, 27 Jul 2009)
New Revision: 27751
add X<> tags to Predefined Subrules
--- docs/Perl6/Spec/S05-regex.pod 2009-07-27 11:16:51 UTC (rev 27750)
+++ docs/Perl6/Spec/S05-regex.pod 2009-07-27 14:51:57 UTC (rev 27751)
@@ -1557,50 +1557,62 @@
=item * ident
Match an identifier.
=item * upper
Match a single uppercase character.
=item * lower
Match a single lowercase character.
=item * alpha
Match a single alphabetic character.
=item * digit
Match a single digit.
=item * xdigit
Match a single hexadecimal digit.
=item * print
Match a single printable character.
=item * graph
Match a single "graphical" character.
=item * cntrl
Match a single "control" character. A control character is usually one that doesn't produce output as such but instead controls the terminal somehow: for example newline and backspace are control characters. All characters with ord() less than 32 are usually classified as control characters (assuming ASCII, the ISO Latin character sets, and Unicode), as is the character with the ord() value of 127 (DEL ).
=item * punct
Match a single punctuation character.
=item * alnum
Match a single alphanumeric character. This is equivalent to <+alpha +digit> .
=item * wb
Returns a zero-width match that is true at word boundaries. A word
boundary is a spot with a "\w" on one side and a "\W" on the other
@@ -1608,41 +1620,49 @@
as matching "\W".
=item * ww
Matches between two word characters (zero-width match).
=item * ws
Matches required whitespace between two word characters, optional
whitespace otherwise. This is roughly equivalent to C<< <!ww> \s* >>
(C<ws> isn't required to use the C<ww> subrule).
=item * space
Match a single whitespace character (same as C< \s > ).
=item * blank
Match a single "blank" character -- in most locales, this corresponds
to space and tab.
=item * before C<pattern>
Perform lookahead -- i.e., check if we're at a position where
C<pattern> matches. Returns a zero-width C<Match> object on
=item * after C<pattern>
Perform lookbehind -- i.e., check if the string before the
current position matches <pattern> (anchored at the end).
Returns a zero-width C<Match> object on success.
=item * <?>
Match a null string, viz., always returns true
=item * <!>
Inverse of <?>, viz., always returns false.