[svn:perl6-synopsis] r8961 - doc/trunk/design/syn

Author: autrijus
Date: Wed Apr 26 10:05:19 2006
New Revision: 8961

Modified:
   doc/trunk/design/syn/S02.pod

Log:
* Further note that Ps/Pe dominates BidiMirroring, so U+298D
  maps to U+298E, and U+298E itself does not open brackets.

Modified: doc/trunk/design/syn/S02.pod
==============================================================================
--- doc/trunk/design/syn/S02.pod	(original)
+++ doc/trunk/design/syn/S02.pod	Wed Apr 26 10:05:19 2006
@@ -52,19 +52,23 @@
 from non-bracketing.  Bracketing characters are defined as any Unicode
 characters with either bidirectional mirrorings or Ps/Pe properties.
 
+In practice, though, you're safest using matching characters with
+Ps/Pe properties, though ASCII angle brackets are a notable exception,
+since they're bidirectional but not in the Ps/Pe set.
+
 Characters with no corresponding closing characters does not qualify
 as opening brackets.  This includes the second section of the BidiMirroring
 data table, as well as C<U+201A> and C<U+201E>.
 
+If a character is already used in Ps/Pe mappings, then its entry in
+BidiMirroring is ignored.  Therefore C<U+298D> maps to C<U+298E>,
+not C<U+2990>, and C<U+298E> itself is not a valid bracket opener.
+
 The C<U+301D> has two closing alternatives, C<U+301E> and C<U+301F>;
 Perl 6 only recognizes the one with lower code point number, C<U+301E>,
 as the closing brace.  This policy also applies to new one-to-many
 mappings introduced in the future.
 
-In practice, though, you're safest using matching characters with
-Ps/Pe properties, though ASCII angle brackets are a notable exception,
-since they're bidirectional but not in the Ps/Pe set.
-
 =back
 
 =head1 Molecules

• [svn:perl6-synopsis] r8961 - doc/trunk/design/syn by autrijus