pod/perlrebackslash.pod: small Unicode additions

Message-Id: <200711260255.lAQ2t37n188664@kosh.hut.fi>

p4raw-id: //depot/perl@32493

diff --git a/pod/perlrebackslash.pod b/pod/perlrebackslash.pod
index d8cfb6a..ac95ace 100644 (file)
--- a/pod/perlrebackslash.pod
+++ b/pod/perlrebackslash.pod
@@ -500,7 +500,9 @@ C<< (?>\x0D\x0A)|\v) >>. Since C<\R> can match a more than one character,
 it cannot be put inside a bracketed character class; C</[\R]/> is an error.
 C<\R> is introduced in perl 5.10.
 
-Mnemonic: none really. C<\R> was picked because PCRE already uses C<\R>.
+Mnemonic: none really. C<\R> was picked because PCRE already uses C<\R>,
+and more importantly because Unicode recommends such a regular expression
+metacharacter, and suggests C<\R> as the notation.
 
 =item \X
 
@@ -512,6 +514,11 @@ mark character followed by zero or more mark characters. Mark characters
 include (but are not restricted to) I<combining characters> and
 I<vowel signs>.
 
+C<\X> matches quite well what normal (non-Unicode-programmer) usage
+would consider a single character: for example a base character
+(the C<\PM> above), for example a letter, followed by zero or more
+diacritics, which are I<combining characters> (the C<\pM*> above).
+
 Mnemonic: eI<X>tended Unicode character.
 
 =back