This week on the Perl 6 mailing lists
"That fuzziness is classic $Larry. Some of the rest of @Larry can be
more *mumble*matic."
-- chromatic in 'where constraints as roles <http://xrl.us/susf>'
Language
where constraints as roles <http://xrl.us/susf>
A few clarifications were added to the original thread 'how typish are
roles'.
In the subthread 'where constraints as roles', started by Trey Harris,
the discussion from the previous week continued.
Last week, Trey asked if a `where` clause or junctive type defines an
anonymous role, while a type parameter defines a lexical role, and
suggested adding this information to S12. Larry Wall replied, saying
that a `where` clause is there for pattern matching...but went on to
note other possibilities. Jonathan Lang felt that S02 gave some
indication of what Trey suggested, and that `where` clauses and
junctive types should not be turned in to roles: roles and junctive
types should be turned in to `where` constraints.
[svn:perl6-synopsis] r13350 - doc/trunk/design/syn <http://xrl.us/szne>
Larry Wall committed a patch on applying dwimmy hypers to hashes, then
disagreed with himself...maybe. He sees two ways of looking at it, and
finds merit in both.
mmd-draft.txt <http://xrl.us/susg>
Earlier, TSa noted that multi-method dispatch is not yet in S06 and
asked if someone could explain the voting mechanism used to select the
dispatch target.
This week, Audrey Tang replied that the plan had been for Larry Wall
to review it in Brazil, but that it may now have to wait a while as
Larry cannot make it to Brazil. She tried to answer the question on
voting, and elaborated further on #perl6. TSa summarized her
explanation.
Parrot Porters
[perl #40443] Separate vtable functions from methods (using :vtable)
<http://xrl.us/r5xe>
Earlier, in ticket [perl #40443] <http://xrl.us/r5xf>, Matt Diephouse
noted that it was decided at OSCON 2006 that vtables and methods
should be separated.
Jonathan wondered if this should be postponed until the object and
namespace issues have been dealt with. Allison Randal summarized the
results of her last conversation with Chip Salzenberg on the topic.
Jonathan thanked her for the specifications and said he would work on
an implementation.
This week, Jonathan reported the implementation in r15039. Allison
suggested a two release cycle for deprecating the old syntax. A bug
she reported with Punie was addressed in r15048, but some tests
continued to fail (the bug was covered in '[perl #40626] [BUG] :vtable
fails for subclasses of core classes <http://xrl.us/szn7>'). There was
further discussion about optimization, with it being agreed that first
the functionality would be added, and later the code could be
improved.
Anyone relying on objects stringifying to class names?
<http://xrl.us/sznk>
Jonathan Worthington noted that if you have a ParrotObject instance
and write `$S0 = foo`, $S0 will contain the name of the class. He
finds this problematic because you cannot overload what class it
stringifies to. He would like to get rid of this but asked if anyone
was relying on the current behavior. He wants to get rid of it in a
week.
Patrick R. Michaud joked that he thought a week was too long to wait
for its removal. He had no objections so long as tests still pass.
Allison Randal agreed with a week, provided tests pass.
Later, Jonathan wrote that he had been confused when he wrote the
post; the code is being used in PGE, for instance.
[perl #40608] key_append segfault <http://xrl.us/sznm>
In ticket [perl #40608] <http://xrl.us/sznn>, Jonathan Worthington
showed a program which segfaults in Parrot on Windows. This issue was
resolved in r15043.
RFC: Actions without barriers <http://xrl.us/szno>
Bob Rogers considered different approaches to eliminating the
continuation barrier from action invocation and wondered if his latest
idea was worth pursuing. Allison Randal replied that she saw the
temptation in the solution, but was glad Bob had paused to ask because
it would ultimately lead in the wrong direction. They discussed the
matter further.
:init Where should we put the flag? <http://xrl.us/sznp>
Kevin Tew implemented `:init` some time ago but cannot check it in
because it requires a flag. Currently he is using
`PObj_private7_FLAG`; Leopold Toetsch suggested `PObj_private2_FLAG`
but that broke tests. He would like to know what flag he should use.
Jonathan Worthington asked if `PObj_private3_FLAG` could be used, as
it is labeled as unused.
Leopold Toetsch suggested 2 or 0. Kevin included his failing test
results with these flags.
[perl #40616] [PATCH] Helping splint check further through the parrot
source <http://xrl.us/sznq>
This week, Paul Cochrane submitted the following patches:
* In ticket [perl #40616] <http://xrl.us/sznr>, he submitted a patch
to enable lint checking of Parrot source code.
* In '[perl #40618] [TODO] Tcl - Missing channelId tests in t/cmd_puts.t
<http://xrl.us/szns>' (ticket [perl #40618] <http://xrl.us/sznt>), he
responded to task [perl #39704] <http://xrl.us/sznu> with tests for
channelld for Tcl.
* In '[perl #40619] [TODO] Tcl - need -regexp tests
in t/cmd_switch.t <http://xrl.us/sznv>' (ticket [perl #40619]
<http://xrl.us/sznw>), he supplied Tcl tests of `-regexp` in response
to cage ticket [perl #39704] <http://xrl.us/sznu>.
* '[perl #40620] [TODO] Tcl - tests error wrongly in t/cmd_expr.t
<http://xrl.us/sznx>' is ticket [perl #40620] <http://xrl.us/szny>
and relates to task [perl #39704] <http://xrl.us/sznu>. It corrects a
false negative in Tcl's stringified integers test.
* '[perl #40627] [TODO] Tcl - test actual flushing in t/cmd_flush.t
<http://xrl.us/szn8>' is ticket [perl #40627]
<http://rt.perl.org/rt3/Ticket/Display.html?id=40627> and
relates to cage task [perl #39704] <http://xrl.us/sznu> on testing
flushing for Tcl.
* '[perl #40628] [TODO] Tcl - need to test reading something in
t/cmd_gets.t <http://xrl.us/szn9>' (ticket [perl #40628]
<http://xrl.us/szvh>) addresses cage task [perl #39704]
<http://xrl.us/sznu> and tests reading something in `t/cmd_gets.t` for
Tcl.
* '[perl #40629] [TODO] Tcl - need to test classes in
t/cmd_stringOld.t <http://xrl.us/szoa>' addresses cage task [perl
#39704] <http://xrl.us/sznu>. The patch tests classes in
`t/cmd_stringOld.t` for Tcl and is ticket [perl #40629]
<http://xrl.us/szvi>.
* In '[perl #40637] [TODO] Tcl - Throw exception
about invalid boolean type in src/pmc/tclstring.pmc
<http://xrl.us/szof>' (ticket [perl #40637] <http://xrl.us/szvj>) in
response to cage task [perl #39704] <http://xrl.us/sznu>, Paul
submitted a patch to throw an exception about an invalid boolean type
for Tcl in `src/pmc/tclstring.pmc`.
* In ticket [perl #40638]
<http://xrl.us/szvk>, posted as '[perl #40638] [TODO] Tcl - work out
why hash implementation insufficient in src/pmc/tclarray.pmc
<http://xrl.us/szog>', Paul responded to cage task [perl #39704]
<http://xrl.us/sznu> with a patch to
`languages/tcl/src/pmc/tclarray.pmc`.
* Message '[perl #40639] [TODO]
Tcl - hack src/pmc/tclfloat.pmc to approximate right precision output
<http://xrl.us/szoh>' (ticket [perl #40639] <http://xrl.us/szvm>,
addressing cage task [perl #39704] <http://xrl.us/sznu>) fixes
`tclfloat.pmc` to the right precision of output.
* '[perl #40640]
[TODO] Tcl - move backslash hash and hex hash into a class attribute
<http://xrl.us/szoi>' (ticket [perl #40640] <http://xrl.us/szvn>) is
in response to cage task [perl #39704] <http://xrl.us/sznu>. The patch
moves backslash and hexadecimal hashes into a class attribute.
'make rsync' failing - required anyway? <http://xrl.us/sznz>
Paul Cochrane reported a "is this still working" comment he found in
`config/gen/makefiles/root.in`. He found that it didn't work, and
wondered if this was something which should be fixed. If so, someone
else should look at it because Paul does not have privileges to do it.
PDD 25 "Concurrency" - first review <http://xrl.us/szn2>
Allison Randal announced the first version of PDD25 on threading and
concurrency. She opened the floor to discussion. Joshua Gatcomb linked
to a related Perlmonks thread <http://perlmonks.org/?node_id=580004>.
Allison thanked him for the link and wrote a bit about the lo
language, which uses 'futures' for concurrency. Larry Wall replied
that lazy lists can be viewed as a form of futures.
[perl #40625] [BUG] website pointer to PDD25 is broken
<http://xrl.us/szn3>
Jerry Gay created ticket [perl #40625] <http://xrl.us/szn4> to note
that the link on parrotcode.org to PDD25 is broken.
STM runtime test hanging intermittently <http://xrl.us/szn6>
Paul Cochrane reported a hanging test in `t/stm/runtime.t` and
wondered if other people have seen the same problem. He included his
configuration.
[perl #40631] [TODO] add tests for native PMC types <http://xrl.us/szob>
In ticket [perl #40631] <http://xrl.us/szvo>, Jerry Gay requested some
tests for native PMC types in the `t/pmc` directory. At the moment
there is just one test for each which verifies if they can be created.
The testing should be much more extensive.
[perl #40632] [TODO] classify failing tests for next release
<http://xrl.us/szoc>
In ticket [perl #40632] <http://xrl.us/szvp>, Jerry Gay noted the
tests which are failing. Will Coleda included his list of failures.
[perl #40634] leftover files... <http://xrl.us/szod>
Will Coleda created ticket [perl #40634] <http://xrl.us/szvq>. He
listed some unexpected files. He thought that one should be ignored by
svn, and the others should be cleaned up after creation.
[perl #40635] osx build warning: <http://xrl.us/szoe>
Will Coleda posted some warnings he got on OSX to ticket [perl #40635]
<http://xrl.us/szvr>.
[perl #40646] [TODO] PGE - add tests for <alpha+[_]>, <alpha-[Jj]>, etc.
<http://xrl.us/szoj>
In ticket [perl #40646] <http://xrl.us/szvs>, Patrick R . Michaud
invited people to write tests for code which adds combined enumerated
classes to PGE.
[perl #40653] [CAGE] [TODO] test pdd format <http://xrl.us/szom>
Jerry Gay created ticket [perl #40653] <http://xrl.us/szvt> for the
task of testing that PDDs follow the format laid out in
`docs/pdds/pdd_template.pod`.
Users
variables inside an eval <http://xrl.us/szop>
Richard Hainsworth asked how to use a scalar inside an eval with Perl
5 from within Pugs. Audrey Tang reported the bug fixed as of r14574.
Acknowlegements
This summary was prepared using Mail::Summary::Tools
<http://xrl.us/qvno>, available on CPAN.
If you appreciate Perl, consider contributing to the Perl Foundation
<http://donate.perlfoundation.org> to help support the development of
Perl.
Yuval Kogman helped with this week's summary.
Thank you to everyone who has pointed out mistakes and offered
suggestions for improving this series. Comments on this summary can be
sent to Ann Barcomb, <[EMAIL PROTECTED]>.
Distribution
This summary can be found in the following places:
* use.perl.org <http://use.perl.org/>
* The Pugs blog <http://pugs.blogs.com/>
* The perl6-announce mailing list <http://xrl.us/qycj>
* ONLamp <http://www.oreillynet.com/onlamp/blog/>
See Also
* Perl Foundation activities <http://blog.perlfoundation.org>
* Perl 6 Development <http://dev.perl.org/perl6>
* Planet Perl Six <http://planetsix.perlfoundation.org/>
