Change 34241 by [EMAIL PROTECTED] on 2008/09/02 15:18:57
The tasks needed to get smart match fixing underway for 5.10.1
Affected files ...
... //depot/perl/pod/perltodo.pod#237 edit
Differences ...
==== //depot/perl/pod/perltodo.pod#237 (text) ====
Index: perl/pod/perltodo.pod
--- perl/pod/perltodo.pod#236~34240~ 2008-09-02 07:16:13.000000000 -0700
+++ perl/pod/perltodo.pod 2008-09-02 08:18:57.000000000 -0700
@@ -23,6 +23,53 @@
=head1 Tasks that only need Perl knowledge
+=head2 Smartmatch design issues
+
+In 5.10.0 the smartmatch operator C<~~> isn't working quite "right". But
+before we can fix the implementation, we need to define what "right" is.
+The first problem is that Robin Houston implemented the Perl 6 smart match
+spec as of February 2006, when smart match was axiomatically symmetrical:
+L<http://groups.google.com/group/perl.perl6.language/msg/bf2b486f089ad021>
+
+Since then the Perl 6 target moved, but the Perl 5 implementation did not.
+
+So it would be useful for someone to compare the Perl 6 smartmatch table
+as of February 2006
L<http://svn.perl.org/viewvc/perl6/doc/trunk/design/syn/S03.pod?view=markup&pathrev=7615>
+and the current table
L<http://svn.perl.org/viewvc/perl6/doc/trunk/design/syn/S03.pod?revision=14556&view=markup>
+and tabulate the differences in Perl 6. The diff is
+C<svn diff -r7615:14556 http://svn.perl.org/perl6/doc/trunk/design/syn/S03.pod>
+-- search for C<=head1 Smart matching>
+
+With that done and published, someone (else) can then map any changed Perl 6
+semantics back to Perl 5, based on how the existing semantics map to Perl 5:
+L<http://search.cpan.org/~rgarcia/perl-5.10.0/pod/perlsyn.pod#Smart_matching_in_detail>
+
+
+There are also some questions that need answering:
+
+=over 4
+
+=item *
+
+How do you negate one? (documentation issue)
+http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00071.html
+
+=item *
+
+Array behaviors
+http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2007-12/msg00799.html
+
+* Should smart matches be symmetrical? (Perl 6 says no)
+
+* Other differences between Perl 5 and Perl 6 smart match?
+
+=item *
+
+Objects and smart match
+http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2007-12/msg00865.html
+
+=back
+
=head2 Remove duplication of test setup.
Schwern notes, that there's duplication of code - lots and lots of tests have
End of Patch.
