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Perl 6 summary, 18-24 Feb, 2007
"'Course, if someone goes ahead and adds the Y combinator, one must naturally begin to wonder what the YY combinator would be... :-) "
-- Larry Wall
"Obviously it generates a function so anonymous that it can't even refer to itself. I call it the depressed existentialist solipsist operator."
-- chromatic, in 'Y not'
Larry Wall announced the demise of
¥, which was not much lamented.
Thomas Wittek suggested calling it
zip and there was some discussion
of whether it is better to use terms like
zip, or to use
ZZ. Several jokes were made along the way.
A commit by Larry Wall replaced ¥ is replaced by Z.
There was also a change with the
XX operator, which became
Steve Lukas remarked that Larry Wall had asked for ideas about good
names for various states of write access. He offered a proposal which
involves indicating that the writeability can be described as variable,
constant, or final. Dr. Ruud added a brief comment about the length of
variable, which he didn't find to be too long.
A commit from Larry Wall clarified that a named argument may name either a label or a variable.
Blair Sutton asked if the synopsis repository is publicly available, and if it is part of the Parrot or Pugs repository. The URL of the repository was posted.
Some time ago, in ticket [perl #29994], Jens Rieks reported an error
imcc/parser_util.c. Klaas-Jan Stol updated the ticket and noted that
the loadlib op works on windows. However, another error was found: when
loading a non-existent library, no exception is raised.
Earlier, chromatic created a patch for
get_name, which Jerry Gay
forwarded to RT to create ticket [perl #41235]. Jerry wanted to
apply the patch before 0.4.8, but chromatic said that he had been waiting
because Allison Randal wanted a deprecation cycle for the rename of
get_name(). Allison replied that she had made a note
that it was deprecated (r17030) and said that the patch could be applied
after the release.
Klaas-Jan Stol reminded people that an issue had not been decided.
Earlier, Jerry Gay created ticket [perl #41237] to address an item in DEPRECATED.pod about PMC Class name IDs. He felt that either it should use one syntax or the other, but not both.
Allison Randal preferred eliminating the dot in classname IDs. Matt Diephouse, on the other hand, liked the dot. Klaas-Jan Stol added that the dot indicates that it is PIR not pure PASM.
Allison thought that if Matt used it to disambiguate between types and local variables, it was a matter of sigils. She asked why put sigils on types instead of putting them in variables, and if a dot was the ideal sigil for types.
In ticket [perl #41529], James Keenan reported that there was a new
Parrot_Distribution.t. Jerry Gay explained that the test
exposes a bug in Parrot::Distribution, which classifies files as Perl
even when they are not. He noted that failing tests had been used as
a reminder of things which needed to be fixed, and this was still used
to some extent, although there was a movement towards RT.
The problem was resolved in r17069.
There was some discussion about the difficulty of identifying the problem. Jerry Gay mentioned that he was working on refactoring Parrot::Distribution.
Eric Hanchrow reported a problem in r16999. Patrick R. Michaud offered some suggestions for correcting the code in question.
Klaas-Jan Stol submitted a patch which adds the description of
Klaas-Jan Stol made some updates to
faq.pod which related to ticket
Klaas-Jan Stol had a question relating to a fix for [perl #39196]. An anonymous subroutine was unexpectedly being found, and he wondered if that was a bug.
Klaas-Jan Stol submitted a patch to replace his earlier one.
A patch by Klaas-Jan Stol made some corrections to
In ticket [perl #41538], Joshua Isom described a problem which could be replicated by creating a small file without a newline at the end. chromatic applied it in r17103.
Klaas-Jan Stol responded to ticket [perl #37542] which he claimed
stated that the behavior of multiple subroutines marked with the
subpragma in the same compilation unit is undefined. However, Klaas-Jan
pointed out that it is defined and wondered if the ticket could be closed.
Patrick R. Michaud agreed with closing the ticket. Will Coleda explained how Klaas-Jan could update the ticket directly.
Nicholas Clark suggested that release versions of Parrot should have debugging flags off so that it will benchmark nicely. This came from a public discussion of the speed of the Ruby implementation.
Tewk noted that the numbers generated by Cardinal are probably incorrect because the current implementation is very minimal.
Joshua Isom wondered if it was best for the default core to be the slow core. Although this makes testing easier, it gives misleading benchmarks.
Earlier, in ticket [perl #40544], Paul Cochrane submitted a test which checks for DOS line endings in the Parrot distribution.
Will Coleda recently noted that some of the problems are related to [perl #41485] and that when he sets the properties in his working copy, the tests succeed. Paul provided an update: he will be do a few commits which update the svn eol property. Because a large number of files will be affected, the update will done in a small time slot.
As of r17102, it was fixed.
Will Coleda reported a failing test in [perl #41548].
Klaas-Jan Stol noted that there are some operations which have been
deprecated but which have not been listed in
suggested adding a check which will emit a warning if an operator is
Klaas-Jan Stol submitted a patch for the Lua grammar file.
Aldo Calpini resurrected comments from Dan Sugalski in 2004 which dealt with cross-compiling. In order to submit patches which do not break the existing code, he asked some questions about how people are using cross-compilation at the moment.
Jerry Gay wanted to see some development in this field, and suggested an approach based upon test-driven development for configuration system changes. Joshua Isom remarked that Perl 5's configure is somewhat limited, and Perl 5 may not always be available. While Aldo agreed that Perl 5's configure is a bad way to go, he didn't see anything wrong with using Perl 5 as the tool to build. Allison Randal also indicated that reliance on Perl 5's configure would be a problem. She proposed that Aldo start with a proposal and patches.
chromatic remarked that it would be nice to be able to put data files somewhere and have configure read those instead of probing the system.
Sam Vilain reported problems with inheritance which can result in the exception 'object has no parent'. Tests were added in r17031 to demonstrate the issue. This problem was explained in ticket [perl #41557].
In ticket [perl #41558], Shawn M Moore submitted a patch which adds a new utility script to create a summary of all the operators.
In ticket [perl #39196], Klaas-Jan Stol submitted a patch which adds
a test for
In ticket [perl #41569], Jerry Gay indicated a problem with a test which fails on Win32.
In preparation for the 0.4.9 release, Patrick R. Michaud asked some questions of people who have previously worked on release management. Allison Randal, chromatic and Nuno Carvalho replied.
In ticket [perl #41576], Patrick R . Michaud reported a failure
Patrick R. Michaud reported in ticket [perl #38983] that he had changed the roadmap to refer to PDD01 instead of the 'PLATFORMS' file which doesn't exist. However, PDD01 is still in draft status, so Patrick asked if it can be approved.
Patrick R . Michaud reported in ticket [perl #41577] that there are some points in the roadmap which may no longer be relevant. Allison Randal fixed them in r17210.
In ticket [perl #41579], Patrick R . Michaud reported two failing tests. chromatic confirmed that this was not restricted to x86_64.
Bram Geron reported that tail calls within v-table methods are broken. Ticket [perl #41583] tracks this bug.
In ticket [perl #41584], Patrick R . Michaud noted that the release instructions should include a reminder to update the website.
Klaas-Jan Stol submitted a patch which contains a simple example which can be added to PDD16. chromatic applied it in r17164.
Earlier, James Keenan noted that he had some new patches for tests. They were added in r17061. The patches can be seen in [perl #41455].
Aldo Calpini submitted a patch to ticket [perl #41597]. This patch adds an 'osname' key to Parrot's configuration data, which is used in the configure process.
Patrick R. Michaud announced the release of Parrot 0.4.9, "Socorro".
chromatic objected to a patch which removed access to a null pointer in
stm/backend.c. He thought that the best solution would be to have the
init() throw an exception.
Allison Randal thought that it made sense to return with no action.
reply_extracted already has the same check, and
should have the check added. Jerry Gay added it in r17159.
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