Author: lwall Date: 2009-04-24 20:00:35 +0200 (Fri, 24 Apr 2009) New Revision: 26403
Modified: docs/Perl6/Spec/S02-bits.pod Log: [S02] clarify the status of many-to-one bracketing Modified: docs/Perl6/Spec/S02-bits.pod =================================================================== --- docs/Perl6/Spec/S02-bits.pod 2009-04-24 17:11:09 UTC (rev 26402) +++ docs/Perl6/Spec/S02-bits.pod 2009-04-24 18:00:35 UTC (rev 26403) @@ -14,7 +14,7 @@ Date: 10 Aug 2004 Last Modified: 24 Apr 2009 Number: 2 - Version: 165 + Version: 166 This document summarizes Apocalypse 2, which covers small-scale lexical items and typological issues. (These Synopses also contain @@ -81,7 +81,7 @@ Characters with no corresponding closing character do not qualify as opening brackets. This includes the second section of the Unicode -BidiMirroring data table, as well as C<U+201A> and C<U+201E>. +BidiMirroring data table. If a character is already used in Ps/Pe/Pi/Pf mappings, then any entry in BidiMirroring is ignored (both forward and backward mappings). @@ -97,6 +97,14 @@ as the closing brace. This policy also applies to new one-to-many mappings introduced in the future. +However, many-to-one mappings are fine; multiple opening characters +may map to the same closing character. For instance, U+2018, U+201A, +and U+201B may all be used as the opener for the U+2019 closer. +Constructs that count openers and closers assume that only the given +opener is special. That is, if you open with one of the alternatives, +all other alternatives are treated as non-bracketing characters within +that construct. + =back =head1 Whitespace and Comments
